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Dual-wavelength random distributed feedback fiber laser with wavelength, linewidth, and power ratio tunability
Optics Express ( IF 3.8 ) Pub Date : 2020-03-25
Yang Zhang, Jun Ye, Jiangming Xu, Jiaxin Song, Tianfu Yao, and Pu Zhou

Owing to the special power distribution property, a random distributed feedback Raman fiber laser can achieve a high power spectrally flexible output with a low power spectrally tuning device. Here, an all-fiberized linearly polarized dual-wavelength random distributed feedback Raman laser with wavelength, linewidth, and power ratio tunability is demonstrated. By adopting two watt-level bandwidth adjustable optical filters, a spectrum-manipulable dual-wavelength output with nearly a 10 W output power is achieved. The wavelength separation can be tuned from 2.5 to 13 nm, and the 3 dB linewidth of the output can be doubled by increasing the bandwidth of the optical filter. The power ratio of each laser line can be tuned from 0 to nearly 100% with the help of two variable optical attenuators. A maximum output power of 9.46 W is realized, with a polarization extinction ratio up to 20.5 dB. The proposed dual-wavelength fiber laser can be employed as a pump source in frequency tunable, bandwidth adjustable terahertz microwave generation, and mid-infrared optical parametric oscillators.

中文翻译:

具有波长,线宽和功率比可调性的双波长随机分布反馈光纤激光器

由于特殊的功率分配特性,随机分布反馈拉曼光纤激光器可以通过低功率频谱调谐设备实现高功率频谱灵活的输出。在此,说明了具有波长,线宽和功率比可调性的全光纤线性偏振双波长随机分布反馈拉曼激光器。通过采用两个瓦特级带宽可调滤光器,可实现具有近10 W输出功率的频谱可控双波长输出。波长间隔可以从2.5 nm调整到13 nm,并且通过增加光学滤波器的带宽,输出的3 dB线宽可以加倍。每条激光线的功率比可借助两个可变光衰减器从0调整到接近100%。实现了9.46 W的最大输出功率,极化消光比高达20.5 dB。提出的双波长光纤激光器可用作频率可调,带宽可调的太赫兹微波产生和中红外光学参量振荡器的泵浦源。
更新日期:2020-03-26
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