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Статті в журналах з теми "OPO Fibre"

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Автор: Grafiati

Опубліковано: 7 липня 2024

Оновлено: 7 липня 2024

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1

Antipov, O. L., D. B. Kolker, A. A. Dobrynin, Yu A. Getmanovskii, V. V. Sharkov, M. A. Chuvakova, A. R. Akhmatkhanov, V. Ya Shur, I. A. Shestakova, and S. V. Larin. "Mid-IR optical parametric oscillation and second harmonic generation of repetitively pulsed output of a fibre-laser pumped Tm³⁺ :YAP laser in a fan-out periodically poled MgO:LiNbO₃ crystal." Quantum Electronics 52, no. 3 (March 1, 2022): 254–61. http://dx.doi.org/10.1070/qel18006.

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Abstract The nonlinear optical frequency conversions of repetitively pulsed output of a 1941-nm Tm3+ : YAP laser pumped by a cw 1670-nm fibre laser are studied experimentally. Both mid-IR optical parametric oscillation (OPO) and second harmonic generation (SHG) are obtained in the same periodically poled MgO : LiNbO3 crystal with a fan-out domain design by tuning the grating period and temperature. The energy conversion efficiency of the degenerate OPO at 3820 – 3970 nm exceeds 43 % at a 0.5 kHz repetition rate, while the energy conversion efficiency of SHG at 970.5 nm reaches 34 %.

2

Ashimatey, Bright S., Brett J. King, Stephen A. Burns, and William H. Swanson. "Evaluating glaucomatous abnormality in peripapillary optical coherence tomography enface visualisation of the retinal nerve fibre layer reflectance." Ophthalmic and Physiological Optics 38, no. 4 (March 30, 2018): 376–88. http://dx.doi.org/10.1111/opo.12449.

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3

Südmeyer, T., J. Aus der Au, R. Paschotta, U. Keller, P. G. R. Smith, G. W. Ross, and D. C. Hanna. "Novel ultrafast parametric systems: high repetition rate single-pass OPG and fibre-feedback OPO." Journal of Physics D: Applied Physics 34, no. 16 (August 7, 2001): 2433–39. http://dx.doi.org/10.1088/0022-3727/34/16/307.

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4

Ashimatey, Bright S., Brett J. King, and William H. Swanson. "Functional characteristics of glaucoma related arcuate defects seen on OCT en face visualisation of the retinal nerve fibre layer." Ophthalmic and Physiological Optics 41, no. 2 (January 25, 2021): 437–46. http://dx.doi.org/10.1111/opo.12780.

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5

Cheloni, Riccardo, and Jonathan Denniss. "Depth‐resolved variations in visibility of retinal nerve fibre bundles across the retina in enface OCT images of healthy eyes." Ophthalmic and Physiological Optics 41, no. 1 (November 4, 2020): 179–91. http://dx.doi.org/10.1111/opo.12756.

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6

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

7

Gspann, Thurid S., Nicola Montinaro, and Alan H. Windle. "CNT fibres - yarns between the extremes." MRS Proceedings 1752 (2015): 117–23. http://dx.doi.org/10.1557/opl.2015.251.

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AbstractThe carbon nanotube community swims in the sea of superlatives. Researchers expect mechanical performance to achieve two extremes, an ultrastrong fibre taking us into space, and a superlubricant saving energy otherwise lost as heat. We examine CNT fibres in the light of traditional yarn science and present an interpretation of properties which combines aspects of these two extremes of performance.

8

Teixeira, Flavia, Bruna Aparecida dos Santos, Graziela Nunes, Jaqueline Machado Soares, Luane Aparecida do Amaral, Gabriel Henrique Oliveira de Souza, Juliano Tadeu Vilela de Resende, et al. "Addition of Orange Peel in Orange Jam: Evaluation of Sensory, Physicochemical, and Nutritional Characteristics." Molecules 25, no. 7 (April 4, 2020): 1670. http://dx.doi.org/10.3390/molecules25071670.

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Orange is highly nutritious and a source of phytochemical compounds. However, its by-products are usually discarded. In this study, we evaluated the effect of orange peel (OP) addition in orange jam on sensory, physicochemical, and nutritional characteristics. Four jam formulations were elaborated with different OP levels: OP0 (standard), OP4, OP8, and OP12 (Orange Peel 0, 4, 8 and 12%, respectively). All samples were evaluated for sensory acceptability, and physicochemical and nutritional composition. The addition of 12% orange peel in jam reduced (p < 0.05) the acceptability for all evaluated attributes, as well as overall acceptance and purchase intention. However, OP utilization increased (p < 0.05) the levels of water activity, soluble solids, titratable acidity, and sugars. Soluble solids/titratable acidity ratio, luminosity (L*), and yellow content (b*) decreased in all added OP jams, while red content (a*) increased. No change in the pH and moisture values of the product were observed after OP addition. Ash, protein, lipid, dietary fiber, ascorbic acid, carotenoids, phenolic compounds, and antioxidant capacity values increased after OP addition, while carbohydrate and energy content decreased. A texture test showed that adhesiveness decreased, while gumminess, chewiness, and elasticity increased after OP addition. We concluded that the addition of up to 8% orange peel in jam maintains sensory acceptability similar to that of the standard product. OP addition is a viable alternative to improve some of the product’s physicochemical and nutritional characteristics.

9

Borshchev, V. Ya, and Yu A. Apporotova. "Organization of Solid Waste Management at an Industrial Company." Voprosy sovremennoj nauki i praktiki. Universitet imeni V.I. Vernadskogo, no. 3(81) (2021): 007–13. http://dx.doi.org/10.17277/voprosy.2021.03.pp.007-013.

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The main types of waste in the production of bulk insulation made of polyester fiber are considered. The physicochemical, toxic and fire hazardous properties of materials have been investigated. The paper presents the findings of the study of an industrial waste management enterprise (OOO Kotovsky Zavod Netkanykh Materialov), where the work on waste management is quite clearly and highly efficient.

10

Çayıroğlu, H., G. Filik, İ. Coşkun, A. Gül Filik, H. Çayan, and A. Şahin. "Spraying opened sugar beet pulp silage with oregano essential oil helps to sustain quality and stability." South African Journal of Animal Science 50, no. 1 (April 16, 2020): 9–16. http://dx.doi.org/10.4314/sajas.v50i1.2.

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This study was conducted to determine the effects of spraying oregano essential oil (OEO) onto sugar beet pulp silage (SBPS) on silage quality and aerobic stability after opening. A factorial experiment with three replicates of three treatments and four time periods was conducted using laboratory-type plastic silos. The treatments were an untreated control, silage sprayed with 10 ml/75 cm2 OEO, and silage sprayed with 20 ml/75 cm2 OEO. The silages were sampled at 0, 72, 120, and 168 hours after spraying. Temperature, L*, a*, and b* colour values, pH, water-soluble carbohydrates, crude nutrient contents, Fleig score, metabolizable energy (ME) value, lactic acid bacteria (LAB), total live bacteria (TLB), yeast, and mould formation were assessed. Spraying OEO onto SBPS did not affect L*, a*, and b* values, pH, water-soluble carbohydrates, and Fleig score values, but decreased temperature. Spraying OEO onto the silage increased organic matter, ether extract, acid detergent fibre, neutral detergent fibre and acid detergent lignin contents without affecting crude protein, crude fibre, nitrogen free extract, and ME contents. Irrespective of treatment, crude protein, ether extract, acid detergent fibre, acid detergent lignin, nitrogen free extract, Fleig score, and ME contents of silages increased with time after spraying. The OEO spraying reduced LAB, TLB, and yeast contents in silages. In conclusion, OEO spraying onto opened SBPS reduced LAB, TLB, and yeast formation and stopped mould growth up to 72 hours without affecting their nutritional properties, suggesting that OEO could be used to ensure the stability of SBPS. Keywords: aerobic stability, mould growth, silage microbiology, nutrients, feeding management

11

Hu, Liemao, Yuning Shao, Xinjie Lv, Jian Ning, Gang Zhao, and Shining Zhu. "Performance Studies of High-Power Optical Parametric Oscillators Pumped by a Pulsed Fiber Laser." Applied Sciences 13, no. 13 (June 21, 2023): 7356. http://dx.doi.org/10.3390/app13137356.

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High-power optical parametric oscillators (OPOs), as mature radiation sources in mid-infrared (MIR), degenerate gradually with wavelength increase, mainly above 3700 nm. Using a periodically poled magnesium-oxide-doped lithium niobate (MgO:PPLN) as the nonlinear crystal, we build a high-power signal-resonant OPO pumped by ytterbium-doped fiber laser (YDFL). To improve the OPO’s output power at ~3.8 μm, the parameters, such as the pump beam’s waist diameter and location, the curvature radius of the output coupler and the length of MgO:PPLN, are discussed in detail. When pump power is 79 ± 4 W with a repetition rate of 200 kHz, the OPO provides up to 8 ± 0.4 W average power in beam quality with M2 factors of ~1.84 and ~1.69 in the two axes. Under the highest output power, the center wavelength of the idler beam is 3768.4 nm with a full-width at half-maximum (FWHM) bandwidth of ~18.6 nm. When the output power reaches ~6.3 W, its power stability is 1.6% root mean square (RMS) over 7 h. Further analysis of the factors affecting OPO’s performance and simple structure are critically essential for compact OPO prototypes with a capacity of high output power.

12

Allan, Ewan, Craig Ballantine, Sebastian C. Robarts, David Bajek, and Richard A. McCracken. "Modelling Dispersion Compensation in a Cascaded-Fiber-Feedback Optical Parametric Oscillator." Optics 2, no. 2 (May 28, 2021): 96–102. http://dx.doi.org/10.3390/opt2020010.

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Fiber-feedback optical parametric oscillators (OPOs) incorporate intracavity fibers to provide a compact high-energy wavelength-tunable laser platform; however, dispersive effects can limit operation to the sub-picosecond regime. In this research article, we modeled pulse propagation through systems of cascaded fibers, incorporating SMF-28 and ultra-high numerical aperture (UHNA) fibers with complementary second-order dispersion coefficients. We found that the pulse duration upon exiting the fiber system is dominated by uncompensated third-order effects, with UHNA7 presenting the best opportunity to realise a cascaded-fiber-feedback OPO.

13

Lin, S. T., Y. Y. Lin, R. Y. Tu, T. D. Wang, and Y. C. Huang. "Fiber-laser-pumped CW OPO for Red, Green, Blue Laser Generation." Optics Express 18, no. 3 (January 21, 2010): 2361. http://dx.doi.org/10.1364/oe.18.002361.

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14

Leaver, K. D., and G. Pagiatakis. "Fabrication tolerances in fibre directional couplers designed to maximise coupling between fibres and diode lasers." IEE Proceedings - Optoelectronics 141, no. 1 (February 1, 1994): 69–74. http://dx.doi.org/10.1049/ip-opt:19949848.

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15

DING, JIANWU, BRUCE W. ODOM, ALLEN R. GEIGER, and RICHARD D. RICHMOND. "A COMPACT EYE-SAFE OPO PUMPED BY A Nd:YAG MICROCHIP MOPA." International Journal of High Speed Electronics and Systems 18, no. 02 (June 2008): 483–92. http://dx.doi.org/10.1142/s0129156408005503.

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A compact high peak power eye-safer optical parametric oscillator was constructed by pumping it with a master oscillator power amplifier consisting of a large-mode-area ytterbium doped fiber amplifier and a diode-pumped, passively Q-switched Nd : YAG microchip laser. The master oscillator power amplifier has the maximum output pulse energy of 570 μJ with a 3 nanosecond pulse width and a 3 kHz pulse repetition rate. The compact singly resonating optical parametric oscillator utilized a 50 mm periodically poled Lithium Niobate crystal and generated high peak power 1.5 μm eye-safe laser pulses with more than 140 μJ pulse energy, 3 nanosecond pulse width and 3 kHz repetition rate.

16

Wang, Kaifeng, Xiao Li, Peng Wang, Weihong Hua, Zefeng Wang, and Kai Han. "Broadband, Continuous-Wave, Mid-Infrared Generation Based on ASE Fiber Source." Photonics 9, no. 10 (October 5, 2022): 724. http://dx.doi.org/10.3390/photonics9100724.

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The research reports broadband, continuous-wave (CW), mid-infrared generation based on an optical parametric oscillator (OPO), pumped by an amplified spontaneous emission (ASE) fiber source. The ASE fiber source has a ytterbium (Yb)-doped fiber master oscillator power amplifier (MOPA) structure. By injecting another fiber laser with high power and a narrow linewidth into the nonlinear crystal, the phase-matching difference frequency generation (DFG) can be realized at a low pumping threshold. It is shown that during the down-conversion of the ASE fiber source, the intracavity DFG can steadily and effectively generate a broadband mid-infrared laser, with a central wavelength of 3713 nm. The bandwidth of the mid-infrared laser is 122 nm. The pump power of 2 W generates a 0.238 W mid-infrared laser with a pump-idler conversion efficiency of 11.6%. It has tremendous application potential in the research of broadband CW mid-infrared lasers.

17

Wang, Ying, Wan Hui Liu, Ke Min Wang, Jiang Hong Tang, Feng Guo Li, Guo Li Shen, and Ru Qin Yu. "Optical Fiber Fluorometric Determination ofo-Nitrophenol." Microchemical Journal 58, no. 1 (January 1998): 90–98. http://dx.doi.org/10.1006/mchj.1997.1521.

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18

Henderson, Angus, and Ryan Stafford. "Low threshold, singly-resonant CW OPO pumped by an all-fiber pump source." Optics Express 14, no. 2 (2006): 767. http://dx.doi.org/10.1364/opex.14.000767.

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19

Cao, Jianjun, Dongyi Shen, Yuanlin Zheng, Yaming Feng, Yan Kong, and Wenjie Wan. "Femtosecond OPO based on MgO:PPLN synchronously pumped by a 532 nm fiber laser." Laser Physics 27, no. 5 (March 23, 2017): 055402. http://dx.doi.org/10.1088/1555-6611/aa637b.

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20

Flügel-Koch, Cassandra M., Mary Ann Croft, Paul L. Kaufman, and Elke Lütjen-Drecoll. "Anteriorly located zonular fibres as a tool for fine regulation in accommodation." Ophthalmic and Physiological Optics 36, no. 1 (October 21, 2015): 13–20. http://dx.doi.org/10.1111/opo.12257.

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21

Symeonidou, Antonia, Rose L. Spear, Roger A. Brooks, and Athina E. Markaki. "Human Mesenchymal Stem Cell Response to 444 Ferritic Stainless Steel Networks." MRS Proceedings 1569 (2013): 73–78. http://dx.doi.org/10.1557/opl.2013.795.

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ABSTRACTThe aim of this work is to improve bone-implant bonding. This can, potentially, be achieved through the use of an implant coating composed of fibre networks. It is hypothesised that such an implant can achieve strong peri-prosthetic bone anchorage, when seeded with human mesenchymal stem cells (hMSCs). The materials employed were 444 and 316L stainless steel fibre networks of the same fibre volume fraction. The present work confirms that hMSCs are able to proliferate and differentiate towards the osteogenic lineage when seeded onto the fibre networks. Cellular viability, proliferation and metabolic activity were assessed and the results suggest higher proliferation rates when hMSC are seeded onto the 444 networks as compared to 316L. Cell distribution was found uniform across the seeded surfaces with 444 showing a somewhat higher infiltration depth.

22

Kezys, D., M. Gecevičius, A. Piskarskas, V. Pyragaitė, V. Smilgevičius, and A. Stabinis. "Multibeam pumping of OPA by radiation of fibre amplifiers." Lithuanian Journal of Physics 51, no. 2 (2011): 137–42. http://dx.doi.org/10.3952/lithjphys.51205.

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23

A, Shah N. "Comparative Study of Strength of Fibre Reinforced Geo polymer Concrete and Conventional OPC Concrete." International Journal of Trend in Scientific Research and Development Volume-2, Issue-5 (August 31, 2018): 378–83. http://dx.doi.org/10.31142/ijtsrd15860.

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24

Imaduddin, Ilmrrizki, Faisal Wiji Prasetya, Muhammad Hasan Basri Hasan, Fachrudin Sofyan, Jalaluddin, Farhan Rizki, and M. Afin. "PKM-Perancangan Automatic Temperatur Control Menggunakan Pd Pada Mesin Pengering Gabah Tipe Rotary." SIPAKARAYA Jurnal Pengabdian Masyarakat 2, no. 1 (September 25, 2023): 41–47. http://dx.doi.org/10.31605/sipakaraya.v2i1.3002.

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During the Community Service (PKM) activities carried out by students and lecturers in Opo-opo Village, Krejengan District, Probolinggo Regency, to assist farmers in the grain drying process. Where the simple drying process generally takes 3 days. To overcome the problem of manual drying, the PKM will design an automatic temperature control using pd on a rotary type grain drying machine. The test results were carried out 3 times, including the first test with 8 kg of grain with a fire setting, a temperature of 57 ℃ was obtained, and the required drying time was 50 minutes, so that the final weight was obtained lower than the initial weight due to a decrease in water content with the result the final grain weight was 7.23 kg and there was a decrease in grain weight of 1.37 kg. For the two grain tests of 7 kg with the fire setting, a temperature of 57 ℃ was obtained, and the drying time required was 30 minutes, so that the final weight was obtained which was lower than the initial weight due to a decrease in water content with the final grain weight being 6.73 kg and there was a decrease in grain weight of 1.87 kg. And for the three grains of 6.15 kg with the fire setting, a temperature of 69 ℃ was obtained, and the required drying time was 20 minutes, so that the final weight was obtained which was lower than the initial weight due to a decrease in water content with the final grain weight being 6. 40 Kg and there was a decrease in grain weight of 1.75 Kg.

25

Yoshino, T., K. Inoue, and Y. Kobayashi. "Spiral fibre microbend sensors." IEE Proceedings - Optoelectronics 144, no. 3 (1997): 145. http://dx.doi.org/10.1049/ip-opt:19971272.

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26

Tang Zhao, 唐. 钊., 张钧翔 Zhang Junxiang, 付士杰 Fu Shijie, 白晓磊 Bai Xiaolei, 盛. 泉. Sheng Quan, 史. 伟. Shi Wei, and 姚建铨 Yao Jianquan. "Tunable CW all-fiber optical parametric oscillator based on the multimode interference filter." Infrared and Laser Engineering 48, no. 5 (2019): 520002. http://dx.doi.org/10.3788/irla201948.0520002.

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27

Feng, Danqi, Yangxu Tang, Run Lei, Ziqing Feng, and Ming Deng. "A Polarimetric Fiber Ring Laser Incorporating a Coupled Optoelectronic Oscillator and Its Application to Magnetic Field Sensing." Photonics 10, no. 6 (June 7, 2023): 662. http://dx.doi.org/10.3390/photonics10060662.

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A novel configuration for a polarimetric fiber ring laser incorporating a coupled optoelectronic oscillator (COEO) is proposed and experimentally demonstrated, and its application to magnetic field sensing is studied. The COEO-based polarimetric fiber ring laser has two mutually coupled loops: the fiber ring laser loop and the OEO loop. In the fiber ring laser loop, longitudinal modes break up into orthogonal polarization modes because of birefringence. The frequency of the polarization mode beat (PMB) signals is determined by the cavity birefringence. In the OEO loop, a microwave signal with its frequency equal to the PMB signal is generated. By feeding the oscillation mode to modulate the optical loop, mode-locking can be achieved, rendering the mode spacing of the laser equal to the frequency of the oscillating OEO mode. We can estimate the birefringence variation by measuring the oscillating frequency of the COEO. To validate the proposed sensing system, a circular birefringence change is introduced in a magneto-optic crystal via the Faraday rotation effect. Then, the magnetic field sensing is implemented. Such configuration can achieve single longitudinal oscillation and realize high-speed and high-precision measurements.

28

Ren, Tingwei, Chunting Wu, Yongji Yu, Tongyu Dai, Fei Chen та Qikun Pan. "Development Progress of 3–5 μm Mid-Infrared Lasers: OPO, Solid-State and Fiber Laser". Applied Sciences 11, № 23 (3 грудня 2021): 11451. http://dx.doi.org/10.3390/app112311451.

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A 3–5 μm mid-infrared band is a good window for atmospheric transmission. It has the advantages of high contrast and strong penetration under high humidity conditions. Therefore, it has important applications in the fields of laser medicine, laser radar, environmental monitoring, remote sensing, molecular spectroscopy, industrial processing, space communication and photoelectric confrontation. In this paper, the application background of mid-infrared laser is summarized. The ways to realize mid-infrared laser output are described by optical parametric oscillation, mid-infrared solid-state laser doped with different active ions and fiber laser doped with different rare earth ions. The advantages and disadvantages of various mid-infrared lasers are briefly described. The technical approaches, schemes and research status of mid-infrared lasers are introduced.

29

Leindecker, Nick, Alireza Marandi, Robert L. Byer, Konstantin L. Vodopyanov, Jie Jiang, Ingmar Hartl, Martin Fermann, and Peter G. Schunemann. "Octave-spanning ultrafast OPO with 26-61µm instantaneous bandwidth pumped by femtosecond Tm-fiber laser." Optics Express 20, no. 7 (March 13, 2012): 7046. http://dx.doi.org/10.1364/oe.20.007046.

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30

Zhong, Kai, Jian-quan Yao, De-gang Xu, Yu-ye Wang, and Peng Wang. "A low-threshold efficient KTA OPO by a fiber-coupled diode-end-pumped Nd:YVO4 laser." Optoelectronics Letters 6, no. 6 (November 2010): 412–16. http://dx.doi.org/10.1007/s11801-010-0078-4.

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31

Riishede, Jesper, Jesper Lægsgaard, Jes Broeng, Anders Bjarklev, Fei Lu, Wayne H. Knox, T. Sørensen, et al. "Fiber Optics." Optics and Photonics News 15, no. 12 (December 1, 2004): 26. http://dx.doi.org/10.1364/opn.15.12.000026.

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32

Besley, J. A., and J. D. Love. "Supermode analysis of fibre transmission." IEE Proceedings - Optoelectronics 144, no. 6 (December 1, 1997): 411–19. http://dx.doi.org/10.1049/ip-opt:19971381.

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33

LIN Qiao, 林巧, 陈柳华 CHEN Liu-hua, 李书 LI Shu, and 吴兴坤 WU Xing-kun. "Fiber optic accelerometer based on fiber-mirror interference cavity." Optics and Precision Engineering 19, no. 6 (2011): 1179–84. http://dx.doi.org/10.3788/ope.20111906.1179.

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34

Castaño, L. F., L. C. Gutiérrez, J. C. Quijano, J. A. Herrera-Ramírez, A. Hoyos, F. J. Vélez, V. H. Aristizábal, L. C. da Silva-Núnez, and J. A. Gómez. "Temperature measurement by means of fiber specklegram sensors (FSS)." Optica Pura y Aplicada 51, no. 3 (October 5, 2018): 1–7. http://dx.doi.org/10.7149/opa.51.3.50306.

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35

Li, Chung-Yi, Hai-Han Lu, Chun-Yu Lin, Chien-An Chu, Bo-Rui Chen, Hung-Hsien Lin, and Chang-Jen Wu. "Fiber-Wireless and Fiber-IVLLC Convergences Based on MZM-OEO-Based BLS." IEEE Photonics Journal 8, no. 2 (April 2016): 1–10. http://dx.doi.org/10.1109/jphot.2016.2538967.

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36

Nuryawan, Arif, C. Abdullah, Che Hazwan, N. Olaiya, Esam Yahya, Iwan Risnasari, Nanang Masruchin, M. Baharudin, Hasmawi Khalid, and H. Abdul Khalil. "Enhancement of Oil Palm Waste Nanoparticles on the Properties and Characterization of Hybrid Plywood Biocomposites." Polymers 12, no. 5 (April 27, 2020): 1007. http://dx.doi.org/10.3390/polym12051007.

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Using oil palm trunk (OPT) layered with empty fruit bunch (EFB), so-called hybrid plywood enhanced with palm oil ash nanoparticles, with phenol-formaldehyde (PF) resin as a binder, was produced in this study. The phenol-formaldehyde (PF) resins filled with different loading of oil palm ash (OPA) nanoparticles were prepared and used as glue for layers of the oil palm trunk (OPT) veneer and empty fruit bunch fibre mat. The resulting hybrid plywood produced was characterised. The physical, mechanical, thermal, and morphological properties of the hybrid plywood panels were investigated. The results obtained showed that the presence of OPA nanoparticles significantly affected the physical, mechanical, and thermal properties of the plywood panels. Significant improvements in dimension from water absorption and thickness swelling experiments were obtained for the plywood panels with the highest OPA nanoparticles loading in PF resin. The mechanical properties indicated that plywood composites showed improvement in flexural, shear, and impact properties until a certain loading of OPA nanoparticles in PF resin. Fracture surface morphology also showed the effectiveness of OPA nanoparticles in the reduction of layer breakage due to force and stress distribution. The thermal stability performance showed that PF filled OPA nanoparticles contributed to the thermal stability of the plywood panels. Therefore, the results obtained in this study showed that OPA nanoparticles certainly improved the characteristic of the hybrid plywood.

37

Tanaka, S., and Y. Ohtsuka. "Fibre optic spectral polarimetry for sensing multiple stress-loaded locations along a length of fibre." IEE Proceedings - Optoelectronics 144, no. 3 (1997): 176. http://dx.doi.org/10.1049/ip-opt:19971185.

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38

Jiang, Ying, and Mingjin Yu. "Influence of birefringence fibre length on demodulation sensitivity based on a fibre loop mirror sensor." IET Optoelectronics 12, no. 5 (October 1, 2018): 254–57. http://dx.doi.org/10.1049/iet-opt.2018.5016.

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39

Caucheteur, Christophe, Tuan Guo, and Jacques Albert. "Multiresonant Fiber Gratings." Optics and Photonics News 33, no. 5 (May 1, 2022): 42. http://dx.doi.org/10.1364/opn.33.5.000042.

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40

Savage, Neil. "Too Much Fiber?" Optics and Photonics News 13, no. 3 (March 1, 2002): 32. http://dx.doi.org/10.1364/opn.13.3.000032.

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41

Behr, Michael, James Rix, Brian Landes, Bryan Barton, Eric Hukkanen, Jasson Patton, Steven Weigand, and Denis Keane. "Evolution of Carbon Fiber Microstructure During Carbonization and High-Temperature Graphitization Measured In Situ Using Synchrotron Wide-Angle X-ray Diffraction." MRS Proceedings 1754 (2015): 13–18. http://dx.doi.org/10.1557/opl.2015.636.

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ABSTRACTThis paper will discuss the structure-property model developed that correlates the tensile modulus to the elastic properties and angular distribution of constituent graphitic layers for carbon fiber derived from a polyethylene precursor. In addition, a high-temperature fiber tensile device was built to enable heating of carbon fiber bundles at a variable rate from 25 °C to greater than ∼2300 °C, while simultaneously applying a tensile stress. This capability combined with synchrotron wide-angle x-ray diffraction (WAXD), enabled observation in situ and in real time of the microstructural transformation from different carbon fiber precursors to high-modulus carbon fiber. Experiments conducted using PAN- and PE-derived fiber precursors reveal stark differences in their carbonization and high-temperature graphitization behavior.

42

Mahnke, Peter, Peter Peuser, and Philipp Huke. "Nd:YAG laser/KTiOAsO4 (KTA) OPO system for laser ultrasound measurements on carbon-fiber-reinforced composite materials." Applied Physics B 116, no. 2 (January 7, 2014): 333–38. http://dx.doi.org/10.1007/s00340-013-5696-7.

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43

Melentiev, Ruslan. "Numerical investigation of thermal field expansion in fiber reinforced composites." Odes’kyi Politechnichnyi Universytet. Pratsi, no. 1 (April 27, 2016): 10–20. http://dx.doi.org/10.15276/opu.1.48.2016.03.

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44

Zhang, Tao, Ji Gui Zhu, and Sheng Hua Ye. "Effect of the Fiber Length of Optoelectronic Oscillator on Sensitivity of Distance Measurement." Advanced Materials Research 753-755 (August 2013): 2099–102. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2099.

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The ultra-long optical fiber of optoelectronic oscillator (OEO) and the high spectral purity of the high frequency microwave signal open the possibility of high-accuracy distance measurement at long range. Sensitivity of distance measurement is highly depending on the length of the cavity. Base on the theory of optoelectronic oscillator and the distance measurement method, the sensitivity is calculated and the demand for spectral-purity of microwave signal are proposed and verified by experiments. Consider the demands of the measurement sensitivity, the spectral purity and the measurement range, as well as the error introduced by environment, the fiber length of OEO would be about 1km when the resolution of frequency measurement is 1Hz.

45

Park, Chanuk, and Sin-Bok Lee. "The Effect of O2O Service Characteristics on Behavioral Intention through the Satisfaction and Dissatisfaction Coexistence: An Investigation on KakaoT." International Journal of Membrane Science and Technology 10, no. 1 (June 22, 2023): 72–80. http://dx.doi.org/10.15379/ijmst.v10i1.1431.

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The study aims to examine the impact of O2O services that have become a ubiquitous part of our daily lives, with a specific focus on the widely used O2O service, KakaoT. Despite a recent setback in the form of a fire that caused inconvenience and harm to its users, some temporarily switched to alternative O2O services but eventually returned to KakaoT, which can be seen as a demonstration of the fact that these alternatives do not fully understand the needs of the users. The research endeavors to distinguish the characteristics of O2O services used by users and analyze the effect on their behavioral intentions through two-factor coexistence. The results of this study are expected to provide valuable insights for existing and future companies providing O2O services

46

Greedy, S. C., H. F. Arrand, P. D. Sewell, and T. M. Benson. "Fibre coupling to SiGe optoelectronic devices." IEE Proceedings - Optoelectronics 147, no. 6 (2000): 391. http://dx.doi.org/10.1049/ip-opt:20000867.

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47

Vorgul, I., A. Vukovic, T. M. Benson, and P. Sewell. "Optical fibre facets: a vector analysis." IEE Proceedings - Optoelectronics 150, no. 6 (December 1, 2003): 508–12. http://dx.doi.org/10.1049/ip-opt:20030375.

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48

Farghal, Ahmed E. A. "Joint impact of fibre dispersion and frequency chirp on MCF-based radio-over-fibre mobile fronthaul." IET Optoelectronics 14, no. 4 (August 1, 2020): 189–98. http://dx.doi.org/10.1049/iet-opt.2019.0051.

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49

Mathura, Nadira, Duncan Cree, and Ryan P. Mulligan. "Characterization and Utilization of Coconut Fibers of the Caribbean." MRS Proceedings 1611 (2014): 95–104. http://dx.doi.org/10.1557/opl.2014.764.

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ABSTRACTIn many tropical countries coconut (coir) fiber production is a major source of income for rural communities. The Caribbean has an abundance of coconuts but research into utilizing its by-products is limited. Environmentally friendly coir fibers are natural polymers generally discarded as waste material in this region. Research has shown that coir fiber from other parts of the world has successfully been recycled. This paper therefore investigates the mechanical properties of Caribbean coir fiber for potential applications in civil engineering.Approximately four hundred fibers were randomly taken from a coir fiber stack and subjected to retting in both distilled and saline water media. The mechanical properties of both the retted and unretted coir fibers were evaluated at weekly increments for a period of 3 months. Tensile strength test, x-ray diffraction analysis and scanning electron micrographs were used to assess trends and relationships between fiber gauge lengths, diameter, tensile strength and Young’s modulus. Diameters ranged between 0.11 mm-0.46 mm, while fiber samples were no longer than 250 mm in length. The tensile strength and strain at break decreased as the gauge length increased for both unretted and retted fibers. The opposite occurred for the relationship between the gauge length and Young’s modulus. Additionally, the tensile strength and modulus decreased as the fiber diameter increased. Neither distilled nor saline water improved the coir fiber’s crystalline index. Scanning electron micrographs qualitatively assessed fiber surfaces and captured necking and microfibril degradation at the fractured ends.The analysis revealed that the tensile strength, modulus, strain at break and crystallinity properties of the Caribbean coir fibers were comparable to commercially available coir fiber which are currently being used in many building applications.

50

Smolskiy, Sergey, and Alexander Bortsov. "Opto-Electronic Oscillator with Mach-Zender Modulator." Infocommunications journal, no. 1 (2019): 45–53. http://dx.doi.org/10.36244/icj.2019.1.6.

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The non-standard opto-electronic oscillator (OEO) operation is discussed in the generation mode of a single-side optical harmonic on the base of external and internal modulation of the laser signal. The OEO mathematical model is formed basing on laser differential equations for the closed radiofrequency network. With the help of the model offered, the phase noise of OEO radiofrequency oscillations is analyzed. It is shown that phase noise reduction in the circuit with external modulation depends not only on the increased laser power and growth of the geometric length of the optical fiber, but on reduction of the laser phase noise.