[1]郭春雨,阮双琛,闫培光,等.光子晶体光纤拉曼激光器研究[J].深圳大学学报理工版,2006,23(3):263-267.
 GUO Chun-yu,RUAN Shuang-chen,YAN Pei-guang,et al.Research on the Raman photonic crystal fiber laser[J].Journal of Shenzhen University Science and Engineering,2006,23(3):263-267.
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光子晶体光纤拉曼激光器研究()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第23卷
期数:
2006年3期
页码:
263-267
栏目:
生命科学
出版日期:
2006-07-30

文章信息/Info

Title:
Research on the Raman photonic crystal fiber laser
文章编号:
1000-2618(2006)03-0263-05
作者:
郭春雨1阮双琛1闫培光1杜戈果1于永芹1郭媛12
1)深圳大学工程技术学院,深圳518060,深圳市激光工程重点实验室,深圳518060;
2)太原理工大学理学院,太原030024
Author(s):
GUO Chun-yu RUAN Shuang-chen YAN Pei-guang DU Ge-guo YU Yong-qin and GUO Yuan
1)Shenzhen Key Laboratory of Laser Engineering College of Engineering and Technology Shenzhen University
2)College of Science Taiyuan University of Technology
关键词:
光子晶体光纤拉曼光纤激光器光纤光柵多极Stokes光拉曼频移
Keywords:
photonic crystal fiber Raman fiber laser fiber Bragg grating higher-order Stokes Raman frequency shift
分类号:
TN248.1; TN 253
文献标志码:
A
摘要:
利用100m非线性光子晶体光纤,以光纤光栅对作为谐振腔,研制成功了低阈值光子晶体光纤拉曼激光器.该光子晶体光纤拉曼激光器的阈值为2W,在抽运动功率6.2W时,得到最大功率为1.8W,波长为1115.9nm的连续拉曼激光器输出,拉曼半峰全宽为1.39nm,对应光-光转化效率为29%,斜率效率41%.且在低功率连续光泵浦下观察到5级拉曼荧光.
Abstract:
Photonic crystal fibers(PCFs) can be designed with a much larger nonlinear coefficient by reducing mode area through its air hole microstructure region,thus leading to orders of magnitude higher Raman gain. So PCF Raman laser(PCF-RL)can greatly reduce cavity length while maintaining a low-pump-threshold. A low-pump-threshold photonic crystal fiber Raman laser was demonstrated, with 100m nonlinear photonic crystal (Crystal Fiber A /S,NL-1550) fiber as gain medium. Both ends of the PCF were spliced to standard single mode fiber using a piece of tapered fiber to provide matched mode field diameter. The cavity utilized a pair of fiber Bragg gratings (FBGs) at 1 115.7 nm as resonator. The FBG at the input end has a reflectivity larger than 99.9%and spectral width of~0.26 nm, while the other at the output end is of 92% reflectivity and~0.1 nm spectral width. A 20W,CW ytterbium fiber laser (IPGModelPYL-20M) with a single-mode randomly polarized 1070 nm output was used as the pump. The collimated laser beam emerging from the pumping source was coupled into the input FBG with a coupling efficiency of 46%. The Stokes spectral evolution was studied. The luminescence spectrum of the fifth order Stokes was observed at a low continuous wave pump power of0.046W. The peak wavelength of each order stokes luminescencewas1 124.1 nm(S1),1 187. 3 nm(S2), 1 259.9 nm(S3),1 323.9 nm(S4),1 400.5 nm (S5), corresponding respectively to a frequency shiftX1=444.6 cm-1,X2=473.3 cm-1,X3=485.8 cm-1,X4=383.2 cm-1,X5=413.4 cm-1. When reaching the threshold pump power of 2W, the Raman luminescence disappeared and the laserof1 115.9 nm was emitted. Increasing the pump power, the pump translated to Raman laser and the central wavelength of the laser was basically stable, with the spectrum width gradually broadening. The maximum outputpowerwas1.8W at the incident pump power of 6.2W. Consequently, the optical conversion efficiency and the maximum slope efficiency were 29%and 41%respectively. The FWHM of lasing light was1.39 nm. From ASE measurements, the peak Raman gain was found to be at1 124.6 nm rather than 1 115.9nm. When the incident pump power was over 6.67 W, the 1124.6nm Stokes at the peak Raman gain would be generated. Because the cavity gain at this wavelength is higher than the cavity loss beyond this pump power level, so the 1124.6nm lasing light would take part in the mode competition. We believe that, with a pair of specially designed FBG at the peak Raman gain region, lower threshold pump power and higher output power would be achieved.

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更新日期/Last Update: 2015-06-26