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首页> 外文期刊>Optics Letters >Stable and spacing-adjustable multiwavelength Raman fiber laser based on mixed-cascaded phosphosilicate fiber Raman linear cavity
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Stable and spacing-adjustable multiwavelength Raman fiber laser based on mixed-cascaded phosphosilicate fiber Raman linear cavity

机译：基于混合级联磷硅酸盐光纤拉曼线性腔的稳定可调光程的多波长拉曼光纤激光器

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摘要

A novel multiwavelength Raman fiber laser based on the mixed-cascaded Stokes effects of phosphosilicate fiber is proposed and demonstrated experimentally. By using stimulated Raman scattering of both P_(2)O_(5) and SiO_(2) along 1 km phosphosilicate fiber pumped with a 1064 nm double-clad fiber laser, the mixed-cascaded Raman linear cavity is formed by a pair of fiber Bragg gratings at 1239 nm, a polarization-maintaining fiber (PMF) Sagnac loop filter, and a conventional optical loop mirror. Up to 15-wavelength stable oscillations around 1320 nm are obtained with a wavelength spacing of 0.44 nm and power nonuniformity of less than 4 dB. By changing the length of the PMF in the Sagnac loop filter from 10 to 5.5 m, the wavelength spacing is adjustable from 0.44 to 0.8 nm. The extinction ratio of the laser is more than 30 dB. Excellent stability is also observed with a peak power fluctuation of less than 0.8 dB in 1 h.
机译：提出了一种基于磷硅酸盐纤维混合级联斯托克斯效应的新型多波长拉曼光纤激光器，并进行了实验验证。通过沿由1064 nm双包层光纤激光器泵浦的1 km磷硅酸盐光纤使用P_（2）O_（5）和SiO_（2）的受激拉曼散射，混合级联拉曼线性腔由一对光纤形成1239 nm的布拉格光栅，保偏光纤（PMF）Sagnac环路滤波器和传统的光学环路镜。可获得1320 nm左右的多达15个波长的稳定振荡，波长间隔为0.44 nm，功率不均匀度小于4 dB。通过将Sagnac环路滤波器中PMF的长度从10更改为5.5 m，可以将波长间隔从0.44调整为0.8 nm。激光的消光比大于30 dB。在1小时内的峰值功率波动小于0.8 dB时，也观察到了出色的稳定性。

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