激光与光电子学进展, 2015, 52 (7): 071401, 网络出版: 2015-05-29   

基于注入式有源双环腔的高功率单频窄线宽光纤激光器 下载: 940次

A High Power, Single-Frequency, Narrow Linewidth Fiber Laser Based on an Active Double-Ring Cavity
作者单位
1 南京邮电大学, 江苏 南京 210046
2 上海贝尔股份有限公司, 江苏 南京 210037
3 南京林业大学, 江苏 南京 210037
摘要
提出了一种注入式有源双环腔结构光纤激光器。采用双环复合腔结构,通过对主环腔增益控制以及子环腔光注入的方法,获得了单频、窄线宽、无跳模的连续稳定激光输出。实验测得激光器的输出功率达36 dBm,信噪比为40 dB,频谱线宽为7.1 kHz,中心波长为1550 nm。数小时运行时间内,激光器的输出功率与波长稳定性较高。该激光器的单频运行取决于主环腔的增益和振荡波长与子环腔内种子激光器的功率和中心波长之间的匹配情况,其中主环腔的增益通过调节抽运光功率、腔内耦合系数进行控制。激光器输出的中心波长可通过改变种子激光器波长进行调谐。利用多模振荡半经典理论模型分析了有源双环腔内实现单频激光输出的物理过程,仿真结果与实验结果一致。该光纤激光器在相干光通信和光纤传感领域将具有广阔的应用前景。
Abstract
A high power, single-frequency, narrow linewidth fiber laser based on an active double-ring cavity under optical injection is proposed. The laser produces power of 36 dBm, signal-to-noise ratio (SNR) of 40 dB and linewidith of 7.1 kHz. The wavelength and power are stable within several hours of observing time. The allfiber double-ring cavity consists of two sub-ring cavities: the main-ring cavity is gain-controlled through adjustment of the pump power and the intracavity feedback ratio, however, the sub-ring cavity is injected by a master laser whose power and wavelength are tunable. To achieve single-frequency lasing, the intracavity gain and oscillation mode′s frequency of double-ring cavity should be matched with the optical power and frequency of the master laser, respectively. This frequency locking condition is achieved by adjusting the pump power and variable optical coupler. The single-longitudinal-mode selection regime is analyzed by a semi-classical multimode oscillation theory. Simulation results are in good accordance with the experimental results. This fiber laser can be useful in current coherent communication systems and distributed optical fiber sensors.

万洪丹, 鲁志明, 胡涛平. 基于注入式有源双环腔的高功率单频窄线宽光纤激光器[J]. 激光与光电子学进展, 2015, 52(7): 071401. Wan Hongdan, Lu Zhiming, Hu Taoping. A High Power, Single-Frequency, Narrow Linewidth Fiber Laser Based on an Active Double-Ring Cavity[J]. Laser & Optoelectronics Progress, 2015, 52(7): 071401.

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