Author Affiliations
Abstract
1 Center of Ultra-precision Optoelectronic Instrument, Harbin Institute of Technology, Harbin 150080, China
2 Key Laboratory of Ultra-precision Intelligent Instrumentation, Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150080, China
A whispering gallery mode resonator (WGMR) filter can narrow laser linewidth while significantly changing the output power characteristics of fiber laser system. It is found that traditional laser output power model is invalid. We report a correction model of a narrow linewidth fiber laser filtered with a WGMR to analyze its power. We believe that the loss of the laser system and the threshold gain increase caused by the WGMR filter lead to the predominate amplified spontaneous emission during the original laser period. According to that, we assume the correction coefficient is an exponential decay related to the Er-doped fiber length in the large loss situation, and we verify it experimentally. As a result, the correction model is valid for WGMR-filtered fiber laser.
whispering gallery resonator filter narrow linewidth fiber laser power output correction model Chinese Optics Letters
2024, 22(3): 031401
强激光与粒子束
2020, 32(10): 101001
强激光与粒子束
2020, 32(1): 011005
Author Affiliations
Abstract
1 Shandong Key Laboratory of Optical Fiber Sensing Technologies, Laser Institute of Shandong Academy of Sciences, Jinan, 250014, China
2 School of Electrical Engineering & Telecommunications, The University of New South Wales, NSW, 2052, Australia
A narrow linewidth laser configuration based on distributed feedback fiber lasers (DFB-FL) with eight wavelengths in the international telecommunication union (ITU) grid is presented and realized. In this laser configuration, eight phase-shifted gratings in series are bidirectionally pumped by two 980-nm laser diodes (LDs). The final laser output with over 10-mW power for each wavelength can be obtained, and the maximum power difference within eight wavelengths is 1.2 dB. The laser configuration with multiple wavelengths and uniform power outputs can be very useful in large scaled optical fiber hydrophone fields.
Multi-wavelength fiber laser distributed feedback fiber laser narrow linewidth fiber laser Photonic Sensors
2016, 6(3): 256
山西大学光电研究所量子光学与光量子器件国家重点实验室, 山西 太原 030006
基于光纤延时声光调制器(AOM)频移自差拍法实验研究了不同线宽激光的功率谱特性，并作了相关的仿真分析；同时，提出了利用短光纤测量窄线宽激光器线宽的一种简单方法。当光纤延时时间小于激光器的相干时间时，自差拍频谱的3 dB带宽不能直接用于标定激光线宽。理论分析和实验均表明，此时激光的线宽信息主要由自差拍频谱中两翼的周期性振荡成分决定，几乎不受中央尖峰的影响。根据最小二乘法理论，对实验所测的自差拍频谱进行理论拟合可获得待测激光的线宽。该方案基本不受延时自差拍系统最小分辨率的限制，可以用于激光线宽的快速测量，特别是窄线宽激光的测量。
激光光学 窄线宽光纤激光器 光纤延时声光频移自差拍法 线宽测量 短光纤 激光与光电子学进展
2016, 53(6): 061407
1 National Engineering Laboratory for Next Generation Internet Access System, Huazhong University of Science and Technology, Wuhan 430074, China
2 School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
3 Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Frontiers of Optoelectronics
2013, 6(2): 180
