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Relevant bibliographies by topics / DISPERSION FLATTENED

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Academic literature on the topic 'DISPERSION FLATTENED'

Author: Grafiati

Published: 11 September 2023

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Journal articles on the topic "DISPERSION FLATTENED"

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NAKAJIMA, Kazuhide, and Takashi MATSUI. "Dispersion-Flattened Photonic Crystal Fiber." Review of Laser Engineering 34, no. 1 (2006): 17–21. http://dx.doi.org/10.2184/lsj.34.17.

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Al-Qdah, M. T. "Employing dispersion-flattened fiber for chromatic dispersion measurement." Optical Engineering 45, no. 5 (2006): 055005. http://dx.doi.org/10.1117/1.2205828.

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Heusinger, Martin, Thomas Flügel-Paul, Kevin Grabowski, Dirk Michaelis, Stefan Risse, and Uwe D. Zeitner. "High-dispersion TIR-GRISMs with flattened angular dispersion profile." Optica 9, no. 4 (2022): 412. http://dx.doi.org/10.1364/optica.427652.

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Guo, Yuhao, Zeinab Jafari, Anu M. Agarwal, et al. "Bilayer dispersion-flattened waveguides with four zero-dispersion wavelengths." Optics Letters 41, no. 21 (2016): 4939. http://dx.doi.org/10.1364/ol.41.004939.

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Abdur Razzak, S. M., Y. Namihira, and F. Begum. "Ultra-flattened dispersion photonic crystal fibre." Electronics Letters 43, no. 11 (2007): 615. http://dx.doi.org/10.1049/el:20070558.

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Survaiya, S. P., and R. K. Shevgaonkar. "Design of subpicosecond dispersion-flattened fibers." IEEE Photonics Technology Letters 8, no. 6 (1996): 803–5. http://dx.doi.org/10.1109/68.502100.

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Zhang, Lin, Yang Yue, Raymond G. Beausoleil, and Alan E. Willner. "Flattened dispersion in silicon slot waveguides." Optics Express 18, no. 19 (2010): 20529. http://dx.doi.org/10.1364/oe.18.020529.

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Yu, M., C. J. McKinstrie, and Govind P. Agrawal. "Modulational instabilities in dispersion-flattened fibers." Physical Review E 52, no. 1 (1995): 1072–80. http://dx.doi.org/10.1103/physreve.52.1072.

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Safaai-Jazi, A., and H. T. Hattori. "Large-effective-area dispersion-flattened fiber." Microwave and Optical Technology Letters 16, no. 6 (1997): 327–28. http://dx.doi.org/10.1002/(sici)1098-2760(19971220)16:6<327::aid-mop1>3.0.co;2-m.

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Islam, Raonaqul, Shubi Felix Kaijage, and Sohel Rana. "Low-loss and dispersion flattened terahertz fiber." Optik 229 (March 2021): 166293. http://dx.doi.org/10.1016/j.ijleo.2021.166293.

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Dissertations / Theses on the topic "DISPERSION FLATTENED"

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Reeves, William Henry. "Photonic crystal fibre : the ultra-flattened dispersion regime." Thesis, University of Bath, 2003. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275816.

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CHU, SHU-HAN, and 朱書漢. "Dispersion Flattened / Polarization Maintaining Photonic Crystal Fibers." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/8etq76.

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碩士<br>國立聯合大學<br>光電工程學系碩士班<br>106<br>Chromatic dispersion in single mode fibers (SMFs) may induce temporal optical pulse broadening; result in serious restrictions in transmission data rates in high-speed optical fiber communication systems. In order to use wavelength band effectively in communication systems, a characteristic of nearly zero flattened dispersion in broadband is desirable to avoid pulse broadening and increase transmission rate. Therefore, there had many studies of dispersion flattened fiber (DFF) published in the past time. In addition, in the fabrication process of conventional optical fiber, an asymmetry of the fiber shape, impurities contained in fiber; and in fiber installment construction, the banding and wiring stress ; these all may result in polarization modal dispersion (PMD). To reduce the transmission rate limited by PMD, many scholars had contributed to articles of polarization maintaining fibers (PMF). In order to reduce excessive loss and poor matching between two kind of fiber, this study merged the functions of DFF and PMF in one fiber, and designed a dual function of dispersion flattened and polarization maintaining fiber based on a photonic crystal fiber (DF/PM PCF). This study used the dispersion slope matching method to design a photonic crystal fiber with broadband nearly zero flattened dispersion and polarization maintain characteristics.

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Chen, Yong-yu, and 陳詠裕. "A Study of Liquid-filled Dispersion-flattened Photonic Crystal Fiber." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/66721740160767554677.

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碩士<br>國立聯合大學<br>光電工程學系碩士班<br>98<br>Photonic Crystal Fiber ( PCF ) is a novel fiber’s structure, which has more outstanding performance than traditional fiber has on the optic characteristics. In general, photonic crystal fiber can be classified into two types. The first one guides light by a principle of “ modified total internal reflection ( MTIR ) ”, which is named as “ Index-guiding Photonic Crystal Fiber ”. The other type of PCF guides light in the photonic band gap which is caused by its periodic structure. This kind of fiber is known as “ photonic band gap fiber ” because its light-guidance complies with photonic band gap effect. In this thesis, we will design an ultra-flatten dispersion fiber based on “ Index-guiding Photonic Crystal Fiber ” by using plane wave expansion ( PWE ) method ( BandSOLVE by RSoft Incorporated ). The material dispersion of a photonic crystal fiber is computed firstly, and then we simulate several PCF structures which fill some liquid of different index in specific cladding holes. To achieve nearly-zero dispersion of the fiber in ultra-wide band, we design the liquid-filled PCF structure deliberately and nullify the waveguide dispersion and material dispersion in the band as wide as possible. Finally, a liquid-filled PCF with ultra-flatten dispersion is designed, which with dispersion of ±1( ps/km-nm) from 1.28μm to 1.74μm is numerically demonstrated.

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KHAMARU, AKASH, and KAJAL SHARMA. "MID-IR SUPERCONTINUUM GENERATION IN DISPERSION FLATTENED AS38SE62 CHALCOGENIDE PHOTONIC CRYSTAL FIBER." Thesis, 2022. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19530.

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Photonic Crystal Fiber has property of generating SC due to non-linear properties and dispersion. SC has many applications like spectroscopy, hyper spectral microscopy, and spectral tissue imaging, optical coherence tomography, optical metrology, frequency comb generation, spectroscopy, and multiplexing of wavelength bisection. In this report, we discuss about the square core photonic crystal fiber using chalcogenide glass As38Se62 as core and air holes in IR region. The designing and virtual simulation is performed by applying the Modal Analysis segment in the Electromagnetic Wave Frequency Domain (EWFD) in COMSOL Multiphysics® software, which further calculated the eigenvalue problem for the Maxwell’s electromagnetic equations by an approach of vectorial finite element method (FEM). The design contains a core and a cladding. In this design, the cladding contains circular air holes whereas the core consists of square chalcogenide glass. As core matter, chalcogenide material As38Se62 was used because non-linear index of refraction that is two to three orders of magnitude higher than silicon dioxide. we observe that, at pump wavelength 3.5 m, the nonlinear coefficient is spotted as 1290 W-1 km-1 and effective mode area as 15.3 m 2 . After calculating various useful values noted above, we moved towards our main goal is to generate supercontinuum pulse. We had taken observation of SCG at different peak powers and different fiber lengths by keeping peak pulse at constant value of 50 fs. When performed experiment, we got a maximum broadened pulse of 2000 nm to 12000 nm in 4200 W peak power and 10 mm of fiber length.

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Huang, Kuo-Ming, and 黃國民. "The dispersion compensation and gain flattened in 4×10 GHz RZ transmission system by using Raman amplifier with DCF and FBGs." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/71004347591704217894.

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碩士<br>國立東華大學<br>光電工程研究所<br>96<br>Since the wavelength dependence of the dispersion in the fiber, the signals of different channels suffer different dispersion, a single bare dispersion-compensated fiber (DCF) cannot compensate for the dispersion of all channels in an optical wavelength division multiplex (WDM) transmission system. However, the chromatic dispersion by which the different wavelength produces must compensate individually, and after long distance transmission the signal energy would decay significantly and must be individually amplified. Although progress in the optical fiber technology had led to the high density wavelength division multiplex (DWDM) transmission, it was still unable regarding the original WDM shortcoming to overcome completely. However the traditional compensation technology still had to penetrate parts, such as optical filter, optical coupler, which constitute a complicated compensation system. Therefore, we proposed in this thesis a new dispersion slope compensator that can simultaneously carry on the chromatic dispersion compensation and the gain-flattening to the DWDM system. This research is also the first experimental demonstration to realize this aspect. An optical gain flattening and double-pass chromatic dispersion compensation system is proposed, the main discussion is under the linear system. We select four wavelengths in C-band to take the DWDM channel and carry on the chromatic dispersion compensation and the gain-flattening in view of the 50km single mode fiber (SMF) optic transmission. We used 4×10GHz electroabsorption modulators integrated distributed feedback laser diode (EA-DFB LD) as the light source, the transmission 50km SMF has the total chromatic dispersion value of 800ps/nm. We used fiber Bragg gratings (FBG’s) to reflect the different channel pulses at different positions for the accumulated dispersion and flatten the signal gain by Raman amplifier (RA) in WDM system. The used pump wavelengths for RA were 1420nm, 1435nm, 1450nm and 1480nm. In the penetration way back and forth compensates two mechanisms, the profile may reply the close primitive optical signals in the time domain full width at half maximum (FWHM), the extinction ratio still held about 10dB, the signals still possess the same central frequencies with their energies restore to the original ones because of the flattened gain. This experimental characteristic lies in the penetration light circulator and the FBG’s having two chromatic dispersion compensations and two Raman gains in the DCF that reduces the DCF length effectively and simultaneously reduces complexity of compensation construction and compensation cost. Besides it is suitable in the RZ transmission system, it will also suitable in the NRZ transmission system as a convenient and effective compensation technology for the high speed and the high bandwidth DWDM system transmission.

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Jian, You-Ren, and 簡佑任. "Design of Broad Band and Gain Flattened Dispersion Compensating Raman/Erbium Doped Fiber Hybrid Amplifiers with All-Optical Gain-Clamped for WDM Systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/76832515025912033936.

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碩士<br>國立東華大學<br>光電工程研究所<br>96<br>In this thesis, we design dispersion-compensated Raman/erbium-doped fiber hybrid amplifiers recycling residual Raman pump for wavelength-division multiplexing (WDM) systems. The hybrid amplifiers system only require single Raman pump source. The experimental results showed that the hybrid amplifiers scheme have net gain of more than 17 dB which provide gain bandwidth over 70 nm from 1525 to 1595 nm for input signal power of -20 dBm. Compared with the conventional dispersion-compensated Raman amplifiers (DCRA), the net gain increases 4.36 dB and the gain bandwidth broadens 50 nm. Besides, there is no significant increase of noise figure (NF) in our experimental setup. The NF is about 6.79 dB. In order to increase gain bandwidth and to flatten gain of the hybrid amplifiers. We used multiple wavelengths Raman pump units to pump the Raman fiber amplifiers. The gain ripple of less than ±1.47 dB can be achieved over 65 nm from 1525 to 1590 nm by the optimal combination of pump wavelength at 1435 and 1480 nm. The gain bandwidth is over 80 nm at a wavelength range of 1520 to 1600 nm. The net gain and NF are 20.01 dB and 5.74 dB for input signal power of -20 dBm, respectively. The all-optical gain clamped technique is a simple and effective way to achieve constant gain characteristics regardless of input signal power variations. To our knowledge, this is the first experimentally demonstration gain-clamped broad band and gain flattened dispersion-compensated Raman/erbium-doped fiber hybrid amplifiers by recycling residual Raman pump with only using a single FBG for WDM systems. The optimum gain clamped wavelength is 1564 nm. The gain variation of less than 0.21 dB can be achieved over 100 nm from 1525 to 1625 nm and the dynamic signal input exceed 18 dBm ranging from -20 to -2 dBm. Besides, the gain ripple of less than ±1.75 dB is achievable over 65 nm from 1530 to 1595 nm. The gain bandwidth is over 80 nm from 1520 to 1600 nm. This hybrid amplifiers system has the advantages of the high transmission capacity, high gain, low noise, broad gain bandwidth, high flattened gain and large dynamic range of input power.

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Wen, Yu-Hsiang, and 溫裕翔. "The Study of Broadband and Gain Flatten double-pass Raman Amplifier in Dispersion Compensating Fiber using Multi-Wavelength Pumping and Residual Pump Power for Increased Efficiency." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/19147554517217888996.

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碩士<br>國立東華大學<br>電機工程學系<br>97<br>In this thesis, because the short dispersion compensation fiber (DCF) length reduces the amount of available gain for a given amount of pump power in the double-pass dispersion compensation Raman amplifier (double-pass DCRA), we proposed double-pass DCRA with pump-reflector. The circulator loop composed of an optical circulator used as pump-reflector so as to recycle residual Raman pump for increase efficiency of the system. When input signal is -25dBm at 1550nm, Raman pump is 260mW at 1450nm, the net gain of the backward pumping double-pass DCRA increased 3.09 dB form 10.49 dB to 13.58 dB and NF decrease 0.35 dB form 7.18 dB to 6.83 dB by adding circulator loop. In addition, the forward pumping double-pass DCRA also increased 3.09 dB form 11.24 dB to 14.33 dB and NF decrease 0.3 dB form 6.55 dB to 6.25 dB by adding circulator loop. We successfully showed that the net gain can be increase and NF decrease of the double-pass DCRA by recycling residual Raman pump. Next, we compared the measured results of the backward pumping scheme with the forward pumping scheme, the net gain of the forward pumping scheme is higher than that backward pumping scheme about 0.75dB with the same components. In addition, the NF of the forward pumping scheme is lower than that backward pumping scheme about 0.58dB. We experimentally demonstrated that the proposed forward pumping scheme is better than the backward pumping scheme form the aspect of Raman gain and NF. And then, we applied the forward pumping double-pass DCRA with pump-reflector into the WDM system further. We compare the measured results of forward multi-pumping scheme with and without circulator loop. When the input signal power level of -25dBm, the results showed overall net gain increase 2.31dB, noise figure decrease 0.36dB and the gain ripple maintain less than ±0.81dB in the gain bandwidth of 52nm form 1533nm to 1585nm just by using 3 wavelength channels Raman pump including 1435nm, 1450nm and 1480nm. In addition, in the same gain bandwidth of 52nm, the proposed forward pumping scheme applied here is also better than the backward pumping scheme because the net gain is 0.59dB higher and the NF is 0.8dB lower with gain ripple ±0.81dB. Finally, we discussed the effects of double Rayleigh scattering/double Rayleigh back scattering (DRS/DRBS) on the above proposed structure by means of modified time-domain extinction method (MTEM). For the forward pumping double-pass DCRA, the multi-path interference (MPI) noise of with circulator loop scheme is lower than that of without circulator loop scheme.

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Book chapters on the topic "DISPERSION FLATTENED"

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Weik, Martin H. "dispersion-flattened optical fiber." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_5292.

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Karak, Anup, and Sanchita Pramanik. "Analysis and Dispersion Engineering for Generation of Ultra-flattened Dispersion in Photonic Crystal Fibers." In Advances in Computer, Communication and Control. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-3122-0_18.

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Kaur, Amritveer, Julie Devi, Ritu Sharma, Varshali Sharma, and Santosh Chaudhary. "Design of Octagonal and Decagonal Lattice Photonic Crystal Fiber for Achieving Ultra Low Flattened Dispersion." In Lecture Notes in Electrical Engineering. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7395-3_5.

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Devi, Julie, Amritveer Kaur, Ritu Sharma, Varshali Sharma, and Santosh Chaudhary. "Design and Analysis of Spiral Photonic Crystal Fiber for Ultra-Flattened Dispersion for C+L+U." In Lecture Notes in Electrical Engineering. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7395-3_3.

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Cai, Yi-Jun, Shu-Han Chu, and Jui-Ming Hsu. "Ultra-broadband dispersion-flattened/polarization-maintaining photonic-crystal fiber." In Engineering Innovation and Design. CRC Press, 2019. http://dx.doi.org/10.1201/9780429019777-6.

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Conference papers on the topic "DISPERSION FLATTENED"

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BHAGAVATULA, V. A. "Dispersion-shifted and dispersion-flattened single-mode designs." In Optical Fiber Communication Conference. OSA, 1986. http://dx.doi.org/10.1364/ofc.1986.wf1.

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Heusinger, M., T. Flügel-Paul, K. Grabowski, D. Michaelis, and U. D. Zeitner. "High dispersive TIR-GRISMs with flattened angular dispersion profile." In Optics and Photonics for Sensing the Environment. OSA, 2020. http://dx.doi.org/10.1364/es.2020.em2c.7.

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Malheiros-Silveira, G. N., J. A. Mores-Jr, E. F. Chillcce, H. E. Hernández-Figueroa, and H. L. Fragnito. "Tellurite Based PCF with Flattened Dispersion." In Latin America Optics and Photonics Conference. OSA, 2010. http://dx.doi.org/10.1364/laop.2010.we30.

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Lucki, M. "Photonic crystal fiber with flattened dispersion." In SPIE Optics + Optoelectronics, edited by Francesco Baldini, Jiri Homola, Robert A. Lieberman, and Kyriacos Kalli. SPIE, 2011. http://dx.doi.org/10.1117/12.886807.

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Liao, Meisong, ZhongChao Duan, Weiqing Gao, Xin Yan, Takenobu Suzuki, and Yasutake Ohishi. "A dispersion flattened tellurite composite holey fiber." In SPIE OPTO, edited by Shibin Jiang, Michel J. F. Digonnet, and J. Christopher Dries. SPIE, 2012. http://dx.doi.org/10.1117/12.905737.

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Chavez Boggio, J. M., D. Bodenmueller, T. Fremberg, et al. "Silicon nitride waveguide with flattened chromatic dispersion." In SPIE Optics + Optoelectronics. SPIE, 2013. http://dx.doi.org/10.1117/12.2017302.

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Huang, Guan-Ru, and Jui-Ming Hsu. "Liquid-filled dispersion-flattened photonic crystal fiber." In 2017 International Conference on Applied System Innovation (ICASI). IEEE, 2017. http://dx.doi.org/10.1109/icasi.2017.7988176.

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Chu, Shu-Han, and Jui-Ming Hsu. "Dispersion flattened / polarization maintaining photonic crystal fiber." In 2018 IEEE International Conference on Applied System Innovation (ICASI). IEEE, 2018. http://dx.doi.org/10.1109/icasi.2018.8394440.

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Gao, Yangsheng. "Parametric study for low loss dispersion-flattened fibers." In OSA Annual Meeting. Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.thww4.

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The analytical formulas of dispersion and mode field radii variation due to the preformfiber drawing ratio (s) and the core-clad index difference (Δn) is derived to approach low loss dispersion-flattened fibers with multiple-cladding. If s2Δn is constant, bend and splice loss will be approximately invariant; both lowering s and raising Δn will lower the dispersion curve. This approach can result in great waveguide dispersion without increasing loss; if s Δn is enlarged, the dispersion curve can be designed to be basically invariant by appropriately lowering s and raising Δn, while bend and splice loss is reduced. Hence the combination of higher core-clad index difference and smaller drawing ratio will be more reasonable for actual low loss dispersion-flattened fibers. On the other hand, adjusting s can compensate dispersion deviation due to disturbed Δn, especially for λ < 1.55 μm. Beyond 1.55 μm, lowering s and raising Δn might make the dispersion-flattening property poor. By selecting suitable s and Δn and adjusting other parameters of arbitrary quadruple-clad profile, low loss dispersion-flattened fibers may be optimized and trial-fabricated.

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Ferrando, Albert, J. J. Miret, Enrique Silvestre-Mora, Miguel V. Andres, Pedro Andres, and Philip S. Russell. "Designing a photonic crystal fiber with flattened dispersion." In ICO XVIII 18th Congress of the International Commission for Optics, edited by Alexander J. Glass, Joseph W. Goodman, Milton Chang, Arthur H. Guenther, and Toshimitsu Asakura. SPIE, 1999. http://dx.doi.org/10.1117/12.354920.

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