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Journal articles on the topic 'Dual-wavelength pumping'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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1

Seidel, Marcus, Jonathan Brons, Fabian Lücking, Vladimir Pervak, Alexander Apolonski, Thomas Udem, and Oleg Pronin. "Carrier-envelope-phase stabilization via dual wavelength pumping." Optics Letters 41, no. 8 (April 15, 2016): 1853. http://dx.doi.org/10.1364/ol.41.001853.

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2

Semmalar, S., and S. Malarkkan. "Output Signal Power Analysis in Erbium-Doped Fiber Amplifier with Pump Power and Length Variation Using Various Pumping Techniques." ISRN Electronics 2013 (November 26, 2013): 1–6. http://dx.doi.org/10.1155/2013/312707.

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The scope of this paper is to analyze the output signal power with pump power and length variation in cascaded EDFA simulation model performance. This paper describes the simulation model of Erbium-Doped Fiber Amplifier (EDFA) of variable lengths (10 m, 50 m, and 120 m) with dual pumping techniques (dual forward pumping with two 980 nm wavelengths, dual forward and backward pumping with two 980 nm wavelengths) and Tri-pumping techniques. The simulation models consist of input source and pump power coupled by WDM coupler which gives optimized signal power in the above-mentioned simulation model. The simulation model consists of source with multiple wavelengths (1520 nm–1618 nm), pumping source with the wavelength 980 nm, isolator, and filter. The resulting models accurately represent EDFA optimized output signal power. Simulation results show that choosing careful fiber length 120 m and pump power 1 W in dual pumping provided 0.07 W optimized output signal power compared to other pumping techniques.

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3

He, Jin-Qi, Yuan Dong, Feng-Dong Zhang, Yong-Ji Yu, Guang-Yong Jin, and Li-Da Liu. "The space-dependent model and output characteristics of intra-cavity pumped dual-wavelength lasers." International Journal of Modern Physics B 30, no. 03 (January 25, 2016): 1550265. http://dx.doi.org/10.1142/s0217979215502653.

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The intra-cavity pumping scheme which is used to simultaneously generate dual-wavelength lasers was proposed and published by us and the space-independent model of quasi-three-level and four-level intra-cavity pumped dual-wavelength lasers was constructed based on this scheme. In this paper, to make the previous study more rigorous, the space-dependent model is adopted. As an example, the output characteristics of 946 nm and 1064 nm dual-wavelength lasers under the conditions of different output mirror transmittances are numerically simulated by using the derived formula and the results are nearly identical to what was previously reported.

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4

Wang, Ke, Liejia Qian, Hang Luo, Peng Yuan, and Heyuan Zhu. "Ultrabroad supercontinuum generation by femtosecond dual-wavelength pumping in sapphire." Optics Express 14, no. 13 (2006): 6366. http://dx.doi.org/10.1364/oe.14.006366.

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5

Zhu, Kaiyan, Jiangyong He, Kun Chang, Dengke Xing, Yange Liu, and Zhi Wang. "Tunable and narrow linewidth multi-wavelength Brillouin-erbium fiber laser using dual-wavelength pumping." Optoelectronics Letters 18, no. 6 (June 2022): 349–53. http://dx.doi.org/10.1007/s11801-022-1173-z.

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6

Singh, Kulwinder, Manjeet Singh Patterh, and Manjit Singh Bhamrah. "A Comparative Analysis of Dual-Order Bidirectional Pumping Schemes in Optical Fiber Raman Amplification." Journal of Optical Communications 40, no. 1 (January 28, 2019): 1–6. http://dx.doi.org/10.1515/joc-2017-0018.

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Abstract In this paper, dual-order bidirectional pumping schemes of distributed fiber Raman amplifier are compared with standard first-order pumping in wavelength division multiplexed optical transmission systems. The novel comparison analysis is carried out in terms of Optical signal-to-noise ratio and Q-factor, on-off gain and noise figure by varying optical input power and fiber lengths. The results indicate that dual-order schemes present 0.02 dB higher OSNR and 5 dB higher Q-factor in comparison to first-order pumping when input optical power is varied from −4 to 5 dBm. Similarly, there is 4 dB higher on-off gain with dual order comparatively to first order when fiber length varied from 10 to 100 km. However, there is degradation in noise figure and Q-factor due to DRBS noise with dual-order pumping when fiber length from 10 to 100 km. Further, the signal power evolutions along fiber length show that there is 5 dBm improvement for 100 km fiber. The novelty of the work is that comparative analysis exhibits improvement in OSNR, on-off gain and Q-factor using dual-order bidirectional pumping.

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7

Wang, Yan Bin, Jing Hou, Chun Le Xiong, Yang Peng, Rui Song, and Qi Sheng Lu. "Supercontinuum Generation with Dual-Wavelengthpumping in an All-Fiber Device." Advanced Materials Research 216 (March 2011): 553–57. http://dx.doi.org/10.4028/www.scientific.net/amr.216.553.

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We have theoretically investigated supercontinuum (SC) generation with dual-wavelength pumping. The dual-wavelength-pumped source at 1064/686nm generated through four-wave mixing and SC generation have been realized in an all-fiber device. A good agreement between our simulation and experimental results has proved the conjugate action of cross-phase modulation and soliton self-frequency shift can obviously improve the power at the visible wavelengths with group-velocity matching between the visible wave at 686nm and the infrared wave at 1064nm.

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8

Nyushkov, Boris, Aleksey Ivanenko, Gleb Vishnyakov, Alexey Kharauzov, and Sergey Smirnov. "Active Compensation of Differential Group Delay in a Dual-Wavelength Pulsed Fiber Laser Driven by Quasi-Synchronous Pumping." Photonics 10, no. 1 (December 31, 2022): 42. http://dx.doi.org/10.3390/photonics10010042.

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We report on synchronized dual-wavelength (1.07 μm and 1.24 μm) pulsed lasing driven by a quasi-synchronous primary pumping (at 0.98 μm) of an Yb-doped fiber laser, which incorporates also a P2O5-doped fiber as an intracavity Raman converter. The original method developed for such lasing does not require saturable absorbers (or optical modulators) and dispersion management. We demonstrated that the mechanism of the quasi-synchronous pumping enables the aforesaid stationary lasing in spite of significant differential group delay (DGD) inevitably acquired by light pulses with such different wavelengths during an intracavity round trip due to large normal chromatic dispersion. This DGD can be actively compensated at every round trip by the forced “acceleration” of the pulses at 1.07 μm in the Yb-doped active fiber due to the overrated frequency of the quasi-synchronous pumping at 0.98 μm. This mechanism is related to the particular pulse amplification dynamics in a such gain-modulated active fiber. The demonstrated approach to synchronized dual-wavelength pulsed lasing in a single-cavity fiber laser features remarkable simplicity and reliability. Our proof-of-concept setup enabled the stable two-wavelength generation of regular trains of nanosecond pulses with energy up to 34 nJ at equal repetition rates.

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9

Räikkönen, E., G. Genty, O. Kimmelma, M. Kaivola, K. P. Hansen, and S. C. Buchter. "Supercontinuum generation by nanosecond dual-wavelength pumping in microstructured optical fibers." Optics Express 14, no. 17 (2006): 7914. http://dx.doi.org/10.1364/oe.14.007914.

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10

Tombelaine, Vincent, Philippe Leproux, Vincent Couderc, and Alain Barthelemy. "Visible Supercontinuum Generation in Holey Fibers by Dual-Wavelength Subnanosecond Pumping." IEEE Photonics Technology Letters 18, no. 23 (December 2006): 2466–68. http://dx.doi.org/10.1109/lpt.2006.886859.

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11

Hu, Guanqu, Jinhui Cui, Fengjun Tian, Zhengxin Gao, Shixiong Yan, Sichen Liu, Xinlu Zhang, and Li Li. "Orthogonally Polarized Dual-Wavelength Gain-Switched Ho:LuLiF4 Pulse Laser." Photonics 10, no. 1 (January 6, 2023): 62. http://dx.doi.org/10.3390/photonics10010062.

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A compact, orthogonally polarized, gain-switched a-cut Ho:LuLiF4 laser with intra-cavity pumping by a self-Q-switched Tm:YAP laser is demonstrated here for the first time. The π-polarization laser at 2052 nm and σ-polarization laser at 2066 nm were experimentally observed with the maximum output power values of 299 mW and 126 mW, respectively, and the two polarization directions were always kept mutually orthogonal as the pump power increased. The ratio of the output power between the two orthogonal polarization lasers was nearly 1:1 at a pump power of 18.4 W. The minimum pulse width of the Ho:LLF laser was 326 ns, the maximum repetition rate was 24 kHz, and the maximum average energy was 28 μJ.

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12

Zhao, Xinmiao, Jingliang Liu, Mingming Liu, Ruobing Li, Luan Zhang, and Xinyu Chen. "An Orbital-Angular-Momentum- and Wavelength-Tunable 2 μm Vortex Laser." Photonics 9, no. 12 (December 1, 2022): 926. http://dx.doi.org/10.3390/photonics9120926.

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In this paper, dual tuning of orbital angular momentum (OAM) and the wavelength of a Tm:YLF vortex laser was realized by off-axis pumping and F-P etalon. The tuning of Hermite–Gaussian (HG) modes by off-axis pumping was theoretically analyzed. In the experiment, the highest 17th order HG17,0 mode was realized by off-axis pumping. The threshold power increased from 2 to 17.51 W with the increase in off-axis distance, and the curve of threshold power vs. off-axis distance was partially consistent with the theoretical simulation analysis. The Laguerre–Gaussian (LG) modes carrying OAM were produced by mode converter, and the beam quality of LG modes was good. The phase distribution of the LG modes was verified by interference. Subsequently, an F-P etalon was inserted into the resonant cavity to tune the wavelength. Finally, the OAM tuning of the vortex beam from LG1,0(OAM = ) to LG16,0(OAM = ) was realized, and the corresponding wavelength tuning range was from 1898–1943 nm to 1898–1937 nm.

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13

Cai, Kaidi, Xin Zhang, Lijie Wang, Yanjing Wang, Huanyu Lu, Cunzhu Tong, and Lijun Wang. "Numerical Analysis of a Dual-Wavelength-Clad-Pumped 3.5 μm Erbium-Doped Fluoride Fiber Laser." Applied Sciences 12, no. 15 (July 29, 2022): 7666. http://dx.doi.org/10.3390/app12157666.

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The stability and efficiency of a 3.5 μm erbium-doped fluoride fiber is strongly limited by the core pumping setup of a 1976 nm pump. A dual-wavelength-clad-pumped scheme was put forward for a more robust and higher electro-optical efficiency in this paper, and a numerical model was built up to stimulate the fiber. Parameter optimizations were given for both the traditional dual-wavelength pump setup and our new scheme. The results show the possibility of using a laser diode as pump source for the generation of a 3.5 μm laser, and the characteristics were analyzed.

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14

Mohamed, Mahmoud, Bin Zhang, Qianli Ma, Josh Kneller, and Chang-Qing Xu. "Efficient Dual-Wavelengths Continuous Mode Lasers by End-Pumping of Series Nd:YVO4 and Nd:GdVO4 Crystals and Speckle Reduction Study." Photonics 6, no. 2 (May 17, 2019): 53. http://dx.doi.org/10.3390/photonics6020053.

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In this paper, diode pumped solid state (DPSS) lasers based on end-pumping series N d : Y V O 4 and N d : G d V O 4 crystals were studied. Dual-, tri-, and quad-wavelength emissions were achieved. In the dual-wavelength emission operation, an optical-to-optical efficiency (O-O) of 48.9% and the power instability was 0.4% were obtained. These are the most efficient and compact lasers operating in continuous wave mode reported to date with series crystals. Besides this, the effect of changing power ratio between the output laser powers on speckle reduction was investigated for the first time. In addition, tri and quad wavelength emissions were achieved with a reasonable efficiency simply by optimizing the cavity parameters.

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15

Aporta Litago, Inaki, Rosa Ana Perez-Herrera, Maria Angeles Quintela, Manuel Lopez-Amo, and Jose Miguel Lopez-Higuera. "Tunable Dual-Wavelength Random Distributed Feedback Fiber Laser With Bidirectional Pumping Source." Journal of Lightwave Technology 34, no. 17 (September 1, 2016): 4148–53. http://dx.doi.org/10.1109/jlt.2016.2585742.

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16

Hong, Yongfeng, Yuan Dong, Jinqi He, Yan Wang, Shutao Li, and Guangyong Jin. "Theoretical model of simultaneous dual-wavelength laser based on intra-cavity pumping." Journal of Optics 17, no. 1 (December 12, 2014): 015702. http://dx.doi.org/10.1088/2040-8978/17/1/015702.

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17

Sheng, Quan, Lu Liu, Xin Ding, Pengbo Jiang, Jian Liu, Xuanyi Yu, Liang Wu, et al. "Thermal Management of Nd:YVO4 Laser by 808-/880-nm Dual-Wavelength Pumping." IEEE Photonics Journal 9, no. 2 (April 2017): 1–7. http://dx.doi.org/10.1109/jphot.2017.2672040.

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18

Ibarra-Garrido, A., M. Durán-Sánchez, O. Pottiez, M. Bello-Jiménez, J. Alaniz-Baylón, L. A. Rodríguez-Morales, I. Armas-Rivera, and B. Ibarra-Escamilla. "Solitons, single- and synchronous dual-wavelength noise-like pulses and hybrid regimes from a thulium-doped fiber laser." Laser Physics Letters 19, no. 12 (November 2, 2022): 125101. http://dx.doi.org/10.1088/1612-202x/ac9cdf.

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Abstract In a passively mode-locked thulium-doped fiber laser within the anomalous dispersion regime, we experimentally demonstrate conventional soliton (CS), hybrid (noise-like pulse (NLP) and solitons), as well as switchable single-wavelength and synchronous dual-wavelength NLP regimes. By properly adjusting the PCs, we can switch between CS to hybrid and single- or dual-wavelength NLP regimes. With sufficient pumping power and through manual polarization adjustments, self-starting mode locking at 1996 nm can be observed. At the pump power of 2.5 W, stable mode locking with an output power of 86 mW is obtained. When generating the CS state, Kelly sidebands due to the spectral interference of dispersive waves are observed. Keeping the pump power at 2.5 W but with a modification of the polarization adjustment we can switch to five different regimes involving NLPs with squared envelope. The noise-like nature of the squared pulses was confirmed in each case through an autocorrelation measurement. By additional adjusting of the PCs, single- and synchronous dual-wavelength squared NLPs can be generated, at either one of two wavelengths in the former case, and at both simultaneously in the latter. The pulse trains from the single-wavelength operations display a small difference in their repetition frequencies inherently determined by intracavity dispersion, whereas in dual-wavelength operation the pulse train displays a single repetition rate whose value is intermediate between the single-wavelength frequencies. The obtained results are valuable to deepen our understanding on the formation of CS and dual-wavelength pulses with noise-like squared profiles in fiber lasers.

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19

Mirza, Jawad, Salman Ghafoor, Ammar Armghan, Osama I. Elhamrawy, Laiq Jamal, Musab Magam, Sharif Iqbal Mitu Sheikh, and Khurram Karim Qureshi. "Performance Enhancement of Ytterbium-Doped Fiber Amplifier Employing a Dual-Stage In-Band Asymmetrical Pumping." Micromachines 13, no. 9 (September 7, 2022): 1488. http://dx.doi.org/10.3390/mi13091488.

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The performance of doped fiber amplifiers can be enhanced significantly with the help of multi-stage pumping technique provided that various critical parameters of pumps including their optical power and wavelength are optimized. We report the performance enhancement of a ytterbium doped fiber amplifier (YDFA) for a 1.02–1.08 μm spectral region with an optimized design based on a novel dual-stage in-band asymmetrical pumping scheme. By accurately adjusting the optical power and wavelength of pumps in both the stages, a record peak gain of around 62.5 dB and output power of 4.5 W are achieved for a signal wavelength of 1.0329 μm at an optimized length of Ytterbium-doped silica fiber and optimized doping concentration of Yb3+. Moreover, a minimum noise figure (NF) of 4 dB is observed for a signal wavelength of 1.0329 μm at the optimized parameters. Similarly, the effect of using high and low pump powers at the first and the second stage, respectively, on NF of the amplifier is also investigated at different values of signal powers. It is observed that the value of NF increases significantly by using high pump power at the first stage and low pump power at the second stage.

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20

Henderson-Sapir, Ori, Jesper Munch, and David J. Ottaway. "Mid-infrared fiber lasers at and beyond 35 μm using dual-wavelength pumping." Optics Letters 39, no. 3 (January 21, 2014): 493. http://dx.doi.org/10.1364/ol.39.000493.

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21

Liu, Hui, Gregory Gredat, Syamsundar De, Ihsan Fsaifes, Aliou Ly, Rémy Vatré, Ghaya Baili, Sophie Bouchoule, Fabienne Goldfarb, and Fabien Bretenaker. "Ultra-low noise dual-frequency VECSEL at telecom wavelength using fully correlated pumping." Optics Letters 43, no. 8 (April 11, 2018): 1794. http://dx.doi.org/10.1364/ol.43.001794.

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22

Anthur, Aravind P., Regan T. Watts, Kai Shi, John O’ Carroll, Deepa Venkitesh, and Liam P. Barry. "Dual correlated pumping scheme for phase noise preservation in all-optical wavelength conversion." Optics Express 21, no. 13 (June 21, 2013): 15568. http://dx.doi.org/10.1364/oe.21.015568.

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23

Jiang, P. B., Q. Sheng, X. Ding, B. Sun, J. Liu, C. Zhao, G. Z. Zhang, et al. "Dual-wavelength eye-safe Nd:GYSGG/YVO 4 intracavity Raman laser under in-band pumping." Optics Communications 383 (January 2017): 6–10. http://dx.doi.org/10.1016/j.optcom.2016.08.054.

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24

Gomes, A. S. L., M. T. Carvalho, and M. L. Sundheimer. "Comparison of distributed gain in two dual-wavelength pumping schemes for thulium-doped fibre amplifiers." Electronics Letters 39, no. 8 (2003): 647. http://dx.doi.org/10.1049/el:20030454.

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25

Lijuan Chen, 陈丽娟, 徐晓东 Xiaodong Xu, 王正平 Zhengping Wang, 李东振 Dongzhen Li, 于浩海 Haohai Yu, 徐军 Jun Xu, 庄士栋 Shidong Zhuang, 郭磊 Lei Guo, 赵永光 Yongguang Zhao, and 许心光 Xinguang Xu. "Efficient dual-wavelength operation of Nd:LYSO laser by diode pumping aimed toward the absorption peak." Chinese Optics Letters 9, no. 7 (2011): 071403–71405. http://dx.doi.org/10.3788/col201109.071403.

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26

Roy, F., D. Bayart, A. Le Sauze, and P. Baniel. "Noise and gain band management of thulium-doped fiber amplifier with dual-wavelength pumping schemes." IEEE Photonics Technology Letters 13, no. 8 (August 2001): 788–90. http://dx.doi.org/10.1109/68.935804.

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27

Tanabe, Setsuhisa, and Takeshi Tamaoka. "Gain characteristics of Tm-doped fluoride fiber amplifier in S-band by dual-wavelength pumping." Journal of Non-Crystalline Solids 326-327 (October 2003): 283–86. http://dx.doi.org/10.1016/s0022-3093(03)00410-1.

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28

Gomes, A. S. L., M. T. Carvalho, M. L. Sundheimer, C. J. A. Bastos-Filho, J. F. Martins-Filho, M. B. Costa e Silva, J. P. von der Weid, and W. Margulis. "Characterization of efficient dual-wavelength (1050 + 800 nm) pumping scheme for thulium-doped fiber amplifiers." IEEE Photonics Technology Letters 15, no. 2 (February 2003): 200–202. http://dx.doi.org/10.1109/lpt.2002.806847.

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29

Liu, Yang, Kai Zhong, Ze Zhang, and Xianzhong Zhang. "High-Power Dual-Wavelength Laser Based on Coaxial End-Pumping Scheme With Combination of Gain Media." IEEE Photonics Journal 14, no. 2 (April 2022): 1–6. http://dx.doi.org/10.1109/jphot.2022.3160723.

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30

Lin, Bin, Kun Xiao, Qiu-Lin Zhang, Dong-Xiang Zhang, Bao-Hua Feng, Qi-Nan Li, and Jing-Liang He. "Dual-wavelength Nd:YAG laser operation at 1319 and 1338 nm by direct pumping at 885 nm." Applied Optics 55, no. 8 (March 7, 2016): 1844. http://dx.doi.org/10.1364/ao.55.001844.

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31

Lin, Zhiquan, Chunlei Yu, Dongbing He, Suya Feng, Danping Chen, and Lili Hu. "Dual-Wavelength Laser Output in Nd3+/Yb3+Co-Doped Phosphate Glass Fiber Under 970 nm Pumping." IEEE Photonics Technology Letters 28, no. 23 (December 1, 2016): 2673–76. http://dx.doi.org/10.1109/lpt.2016.2615058.

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32

Li, Mingzhu, Fang Lu, Fei Xu, Zuimin Jiang, Xiao Wang, Haonan Lou, Zhongquan Ma, and Lingling Zheng. "Realization of modulating broadband emission from Er–Tm codoped calcium boroaluminate glasses by dual-wavelength pumping." Materials Chemistry and Physics 137, no. 1 (November 2012): 270–75. http://dx.doi.org/10.1016/j.matchemphys.2012.09.020.

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33

Kasamatsu, Tadashi, Yutaka Yano, and Hitoshi Sekita. "150-µm-band gain-shifted thulium-doped fiber amplifier with 105- and 156-µm dual-wavelength pumping." Optics Letters 24, no. 23 (December 1, 1999): 1684. http://dx.doi.org/10.1364/ol.24.001684.

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34

Tanabe, Setsuhisa, and Takeshi Tamaoka. "Gain characteristics of Tm-doped fiber amplifier by dual-wavelength pumping with a tunable L-band source." Optical Materials 25, no. 2 (March 2004): 165–69. http://dx.doi.org/10.1016/j.optmat.2003.05.001.

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35

He, Zhibin, Yulun Wu, Anxin Yu, and Wensong Li. "Enhancement of visible emission in an Ho3+-doped fluorozirconate fiber using dual-wavelength pumping at 44X nm." Journal of Luminescence 254 (February 2023): 119542. http://dx.doi.org/10.1016/j.jlumin.2022.119542.

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36

Wang, Chenchen, Hongyu Luo, Jian Yang, Jianfeng Li, and Yong Liu. "Watt-Level ~3.5 μm Er³⁺-Doped ZrF₄ Fiber Laser Using Dual-Wavelength Pumping at 655 and 1981 nm." IEEE Photonics Technology Letters 33, no. 15 (August 1, 2021): 784–87. http://dx.doi.org/10.1109/lpt.2021.3090372.

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37

Gao, Weiqing, Qiang Xu, Xue Li, Wei Zhang, Jigang Hu, Yuan Li, Xiangdong Chen, et al. "Experimental investigation on supercontinuum generation by single, dual, and triple wavelength pumping in a silica photonic crystal fiber." Applied Optics 55, no. 33 (November 17, 2016): 9514. http://dx.doi.org/10.1364/ao.55.009514.

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38

Schreiber, T., T. V. Andersen, D. Schimpf, J. Limpert, and A. Tünnermann. "Supercontinuum generation by femtosecond single and dual wavelength pumping in photonic crystal fibers with two zero dispersion wavelengths." Optics Express 13, no. 23 (November 14, 2005): 9556. http://dx.doi.org/10.1364/opex.13.009556.

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39

Kumar, Chakresh, and Rakesh Goyal. "Flattened gain S + C + L Band RAMAN–Thulium-Doped Tellurite Fiber Amplifier Hybrid Optical Amplifier for Super Dense Wavelength Division Multiplexing System." Journal of Optical Communications 40, no. 3 (July 26, 2019): 167–70. http://dx.doi.org/10.1515/joc-2017-0068.

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Abstract In this paper we have examined the performances of 180×10 Gbps super dense wavelength division multiplexing (SD-WDM) system using the RAMAN–thulium-doped tellurite fiber amplifier (TDTFA) hybrid optical amplifier (HOA) with the channel spacing of 50 GHz in S+C+L band. Accepted rating flattened gain of 39.21 dB with the noise figure less than 5 dB is archived with the dual-pumping ( power level of 500 mW at 980 nm and at 1100 nm for RAMAN optical amplifier and similar, power level of TDTF amplifier is set to 500 mW and 350 mW at 1150 nm) technique. The effect of the proposed hybrid amplifier is evaluated in terms of gain and noise figure without using any coast effective technique. The outcome from the proposed model is also compared here with the existing optical amplifier.

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40

Bi, Wanjun, Xia Li, Juanjuan Gao, Lei Zhang, and Meisong Liao. "Numerical simulations of the ultrabroadband supercontinuum generation by dual-wavelength pumping in photonic crystal fiber with two zero dispersion wavelengths." Applied Optics 54, no. 14 (May 8, 2015): 4542. http://dx.doi.org/10.1364/ao.54.004542.

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41

Jia, Jing, Zhe Kang, Qiangsheng Huang, and Sailing He. "Mid-Infrared Highly Efficient, Broadband, and Flattened Dispersive Wave Generation via Dual-Coupled Thin-Film Lithium-Niobate-on-Insulator Waveguide." Applied Sciences 12, no. 18 (September 11, 2022): 9130. http://dx.doi.org/10.3390/app12189130.

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We designed a structure of dual-coupled ridge waveguide in thin-film lithium-niobate-on-insulator (LNOI) and numerically studied the highly efficient, broadband, and flattened dispersive wave-enhanced supercontinuum generation in the mid-infrared region. By leveraging the mode coupling of the proposed dual-coupled waveguide structure, one of the supermodes, namely the anti-symmetric mode, can produce additional zero-dispersion wavelengths in the mid-infrared region, and consequently multiple normal dispersion regions for dispersive wave emission. Given the rich geometrical degrees of freedom powered by this dual-coupled LNOI waveguide structure, we can tailor the dispersion profile so that a well-established mode-locked fiber laser in the telecommunication band can serve as the pump. Thus, the whole system can potentially be fiber-to-chip integrated and packaged, enabling a compact, cost-effective, and low system-complexity platform. We numerically show that the broadband dispersive wave covering the wavelength range of 1.92~3.55 μm (−20 dB level, near octave-spanning) with spectral flatness of 6.31 dB can be achieved using a 1550 nm, 190 pJ femtosecond pump seed. When the dual hump-shaped spectrum is obtained, the conversion efficiency of the mid-infrared dispersive wave can be up to 19.31%. The influence of the pumping conditions on the performance of mid-infrared dispersive wave generation was also studied. This work provides a competitive candidate for efficient, broadband, and flattened mid-infrared spectrum generation, which can find important applications in spectroscopy, metrology, and communication.

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42

Suresh, K., K. Venkata Krishnaiah, Ch Basavapoornima, Shobha Rani Depuru, and C. K. Jayasankar. "Enhancement of 1.8 μm emission in Er3+/Tm3+ co-doped tellurite glasses: Role of energy transfer and dual wavelength pumping schemes." Journal of Alloys and Compounds 827 (June 2020): 154038. http://dx.doi.org/10.1016/j.jallcom.2020.154038.

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Kaur, Palvinder, Karamdeep Singh, Shivinder Devra, Gagandeep Kaur, and Maninder Lal Singh. "Evaluation of Gain Spectrum of Silica-Based Single/Dual-Pumped Thulium-Doped Fiber Amplifier (TDFA) by Optimizing Its Physical and Pumping Parameters in the Scenario of Dense Wavelength Division Multiplexed Systems (DWDM)." Journal of Optical Communications 40, no. 4 (October 25, 2019): 353–62. http://dx.doi.org/10.1515/joc-2017-0100.

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Abstract Thulium-doped fiber amplifier is a very proficient broadband fiber amplifier in S-band. Silica-based TDFA is a popular choice due to some of its evident features such as non-toxic nature, easy splicing and simple assembling. In this work, we have simulated and optimized various TDFA’s physical and operational parameters in order to obtain required gain spectra at different channel spacings. Further, a comparative study has been carried out between single and dual-pumped TDFAs. By using dual pumping scheme (1040 nm and 1000 nm) as fundamental source of excitation, maximum gain of 23.31 dB has been achieved at 1468.8 nm in region spanning 1400 nm to 1470 nm wavelengths with noise figure of 3.72 dB.

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Sewify, Gamal Hassan, Khurram Javid, Muhammad Adeel, Aamar Abbasi, Sami Ullah Khan, Mohamed Omri, and Lioua Kolsi. "Blood Flow in Multi-Sinusoidal Curved Passages with Biomimetic Rheology: An Application of Blood Pumping." Mathematics 10, no. 9 (May 7, 2022): 1579. http://dx.doi.org/10.3390/math10091579.

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The unsteady flow of biological liquid through non-uniform pumps under porosity impacts is considered. The Jeffrey fluid is used as blood in the current study, which is also characterized as viscoelastic fluid because of its dual characteristics: on the one hand, its viscosity in nature; on the other hand, its elastic effect. Rheological equations are framed in a curvilinear coordinates system, and porosity influences are simulated with the body force term in momentum equations. The flow system has been transformed from fixed to wave frame using a linear–mathematical transformation between these two frames. In the next mathematical steps, these transformed equations are given in non-dimensional form using physical variables. The system of PDE is reduced to an ODE under lubrication theory and long wavelength approximation. Solutions to reduced ordinary differential equations are obtained numerically in MATLAB software via a BVP4C scheme. The physical impacts of the involved parameters on flow features, such as curvature, porosity (Darcy’s number), non-uniformity, and viscoelastic parameters, have been visualized graphically. Multi-sinusoidal waves are used in the boundary wall of the curved pump for peristaltic pumping. The magnitude of velocity profile for a saw-tooth wave (trapezoidal wave) is larger (smaller) than all other natures of peristaltic waves. The larger intensity of Darcy’s number has a dynamic role in the reduction of peristaltic pumping, whereas the opposite behavior is noticed when increasing the non-uniform nature of a channel. A comparison between all multi-sinusoidal waves is also addressed. The results of the present research shall be very productive for the manufacture of peristaltic pumps for drug delivery and bio-medical systems.

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Singh, Karamdeep, Palvinder Kaur, Shivinder Devra, and Gagandeep Kaur. "Evaluation of gain spectrum of dual/triple pumped fiber Raman amplifier (FRA) by optimizing its pumping parameters in the scenario of dense wavelength division multiplexed (DWDM) systems." Optik 176 (January 2019): 246–53. http://dx.doi.org/10.1016/j.ijleo.2018.09.067.

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Kaminskii, A. A., L. Bohatý, P. Becker, H. Rhee, H. J. Eichler, O. Lux, and V. V. Koltashev. "Stimulated Raman scattering in natural crystals of SrSO4, BaSO4 and PbSO4: High-order Stokes and anti-Stokes generation with single-wavelength UV, visible, and near-IR excitation, as well as cascaded up-conversion nonlinear χ (3)↔χ (3) lasing effects under dual-wavelength picosecond collinear coherent pumping." Applied Physics B 105, no. 2 (February 5, 2011): 363–78. http://dx.doi.org/10.1007/s00340-011-4388-4.

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Kaminskii, A. A., O. Lux, H. Rhee, H. J. Eichler, H. Yoneda, A. Shirakawa, K. Ueda, R. Rückamp, L. Bohatý, and P. Becker. "Manifestations of nonlinear optical effects in a novel SRS-active crystal—natural topaz, Al2(F1−x(OH)x)2SiO4: many-phonon χ(3)-lasing, more than sesqui-octave Stokes and anti-Stokes multi-wavelength comb lasing, cascaded and cross-cascaded χ(3)↔χ(3)Raman-induced interactions under single- and dual-wavelength picosecond collinear coherent pumping, THG and combined SRS-promoting phonon modes." Laser Physics Letters 10, no. 7 (June 4, 2013): 073001. http://dx.doi.org/10.1088/1612-2011/10/7/073001.

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Grzegorczyk, Adrian, and Marcin Mamajek. "A 70 W thulium-doped all-fiber laser operating at 1940 nm." Photonics Letters of Poland 11, no. 3 (September 30, 2019): 81. http://dx.doi.org/10.4302/plp.v11i3.928.

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An all-fiber thulium-doped fiber laser operating at a wavelength of 1940 nm is reported. A maximum output continuous-wave power of 70.7 W with a slope efficiency of 59%, determined with respect to the absorbed pump power, was demonstrated. The laser delivered almost a single-mode beam with a beam quality factor of < 1.3.Full Text: PDF ReferencesM. N. Zervas and C. A. Codemard, "High Power Fiber Lasers: A Review", IEEE J. Sel. Top. Quantum Electron. 20, 0904123 (2014). CrossRef D. J. Richardson, J. Nilsson, and W. A. Clarkson. "High power fiber lasers: current status and future perspectives [Invited]", J. Opt. Soc. Am. B 27, B63 (2010). CrossRef J. Swiderski, A. Zajac, and M. Skorczakowski, "Pulsed ytterbium-doped large mode area double-clad fiber amplifier in MOFPA configuration", Opto-Electron. Rev. 15, 98 (2007). CrossRef M. Eckerle et al. "High-average-power actively-modelocked Tm3+ fiber lasers", Proc. SPIE 8237, 823740 (2012). CrossRef J. Swiderski, D. Dorosz, M. Skorczakowski, and W. Pichola, "Ytterbium-doped fiber amplifier with tunable repetition rate and pulse duration", Laser Phys. 20, 1738 (2010). CrossRef P. Grzes and J. Swiderski, "Gain-Switched 2-μm Fiber Laser System Providing Kilowatt Peak-Power Mode-Locked Resembling Pulses and Its Application to Supercontinuum Generation in Fluoride Fibers", IEEE Phot. J. 10, 1 (2018). CrossRef S. Liang et al. "Transmission of wireless signals using space division multiplexing in few mode fibers", Opt. Express 26, 6490 (2018). CrossRef J. Swiderski, M. Michalska, and P. Grzes, "Broadband and top-flat mid-infrared supercontinuum generation with 3.52 W time-averaged power in a ZBLAN fiber directly pumped by a 2-µm mode-locked fiber laser and amplifier", Appl. Phys. B 124, 152 (2018). CrossRef F. Zhao et al. "Electromagnetically induced polarization grating", Sci. Rep. 8, 16369 (2018). CrossRef J. Sotor et al. "Ultrafast thulium-doped fiber laser mode locked with black phosphorus", Opt. Lett. 40, 3885 (2015). CrossRef M. Olivier et al. "Femtosecond fiber Mamyshev oscillator at 1550 nm", Opt. Lett. 44, 851 (2019). CrossRef J. Swiderski and M. Michalska, "Over three-octave spanning supercontinuum generated in a fluoride fiber pumped by Er & Er:Yb-doped and Tm-doped fiber amplifiers", Opt. Laser Technol. 52, 75 (2013). CrossRef C.Yao et al. "High-power mid-infrared supercontinuum laser source using fluorotellurite fiber", Optica 5, 1264 (2018). CrossRef J. Swiderski and M. Maciejewska, "Watt-level, all-fiber supercontinuum source based on telecom-grade fiber components", Appl. Phys. B 109, 177 (2012). CrossRef O. Traxer and E. X. Keller, "Thulium fiber laser: the new player for kidney stone treatment? A comparison with Holmium:YAG laser", World J. Urol., 1-12 (2019). CrossRef M. Michalska, et al. "Highly stable, efficient Tm-doped fiber laser—a potential scalpel for low invasive surgery", Laser Phys. Lett. 13, 115101 (2016). CrossRef R. L. Blackmon et al. "Thulium fiber laser ablation of kidney stones using a 50-μm-core silica optical fiber", Opt. Eng., 54, 011004 (2015). CrossRef A. Zajac et al. "Fibre lasers – conditioning constructional and technological", Bull. Pol. Ac.: Tech. 58, 491 (2010). CrossRef C. Guo, D. Shen, J. Long, and F. Wang, "High-power and widely tunable Tm-doped fiber laser at 2 \mu m", Chin. Opt. Lett. 10, 091406 (2012). CrossRef F. Liu et al. "Tandem-pumped, tunable thulium-doped fiber laser in 2.1 μm wavelength region", Opt. Express 27, 8283 (2019). CrossRef H. Ahmad, M. Z. Samion, K. Thambiratnam, and M. Yasin, "Widely Tunable Dual-Wavelength Thulium-doped fiber laser Operating in 1.8-2.0 mm Region", Optik 179, 76 (2019). CrossRef N. M. Fried, "Thulium fiber laser lithotripsy: An in vitro analysis of stone fragmentation using a modulated 110‐watt Thulium fiber laser at 1.94 µm", Lasers Surg. Med. 37, 53 (2005). CrossRef N. M. Fried, "High‐power laser vaporization of the canine prostate using a 110 W Thulium fiber laser at 1.91 μm", Lasers Surg. Med. 36, 52 (2005). CrossRef E. Lippert et al. "Polymers Designed for Laser Applications-Fundamentals and Applications", Proc. SPIE 6397, P639704 (2006). CrossRef N. Dalloz et al. "High power Q-switched Tm3+, Ho3+-codoped 2μm fiber laser and application for direct OPO pumping", Proc. SPIE 10897, 108970J (2019). CrossRef N. J. Ramírez-Martinez, M. Nunez-Velazquez, A. A. Umnikov, and J. K. Sahu, "Highly efficient thulium-doped high-power laser fibers fabricated by MCVD", Opt. Express 27, 196 (2019). CrossRef T. Ehrenreich et al. "1-kW, All-Glass Tm:fiber Laser", Proc. SPIE 7580, 758016 (2010). DirectLink L. Shah et al. "Integrated Tm:fiber MOPA with polarized output and narrow linewidth with 100 W average power", Opt. Express 20, 20558 (2012). CrossRef H. Zhen-Yue, Y. Ping, X. Qi-Rong, L. Qiang, and G. Ma-Li, "227-W output all-fiberized Tm-doped fiber laser at 1908 nm", Chin. Phys. B 23, 104206 (2014). CrossRef

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Semmalar, S., and S. Malarkkan. "EDFA AND EYCDFA POWER BOOSTER FOR SECURED, HIGH SPEED AND MULTIPLE WAVELENGTH SERVICES IN OPTICAL COMMUNICATION SYSTEMS USING WDM AND QUAD-SINGLE FORWARD AND TRI BACKWARD PUMPING TECHNIQUE." International Journal of Engineering Applied Sciences and Technology 5, no. 12 (April 1, 2021). http://dx.doi.org/10.33564/ijeast.2021.v05i12.032.

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Proposed the EDFA and EYCDFA power booster (Erbium Doped Fiber Amplifier- Erbium ytterbium co doped fiber amplifier) with quad pumping for high speed and multi wavelength services in an optical communication. The proposed EDFA and EYCDFA power booster with WDM(Wavelength division multiplexing) simulated by dual forward and Backward pumping, Dual-backward pumping, Tri-single forward and dual backward pumping and Quadsingle forward and tri-backward pumping with respect to Pump power and fiber Length. The parameters Input Optical power, Output Optical power, Forward Signal power, Backward Signal power measured and determined the speed of transmission in all types of pumping methods. From that the proposed EDFA- ans EYCDFA power booster with WDM quad pumping is the best suitable for secured high speed optical telecommunication systems. The results shown in Quad pumping Output optical power is maximum 25.2dB and optimum spectral forward Signal power is 30.5dBm and very less spectral optical backward signal power of -25.4dBm with Length 5m

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50

Zhang, Xin, Cunzhu Tong, Kaidi Cai, and Wang Yanjing. "Pulse light manipulate output state of 3.6 µm fluoride fiber laser in DWP system." Japanese Journal of Applied Physics, June 28, 2022. http://dx.doi.org/10.35848/1347-4065/ac7cab.

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Abstract Strong driving with light offers the potential to manipulate the properties of fluoride fiber on absorbed characteristics. A 3.6 µm continuous wave (CW) fiber laser pumped by the 1973 nm CW fiber laser and the 976 nm pulsed diode sources was demonstrated in dual-wavelength pumping system. The output state could be changed from pulse to CW by controlling the repetition frequency and pumping power of the 976 nm pulsed pump source. By optimizing the pumping parameter, a maximum output power of 1.2 W was achieved for the 3.6 µm CW fiber laser. The demonstrated method shows a new solution for controlling output state of 3.6 µm fiber lasers, which can be used to achieve high power CW laser output. And it would be helpful for better understanding the interaction process of particle transition in dual-wavelength pumping system.

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