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讨论了分布式光纤拉曼增益放大器的工作原理 ,采用 132 0nm固体激光器作为抽运源 ,获得了 1410nm波段附近的光放大 ,在单模GI光纤长度为 2 3km时 ,初步研究了拉曼放大器增益与光纤作用长度的关系 ,抽运脉冲峰值功率分别为 5 0W、30W时 ,光纤的有效作用长度分别为 15 .5km和 10 .5km ;研究了在不同的光纤有效作用长度时 ,拉曼放大器增益与抽运功率的关系 ;从光纤拉曼光谱图估算了光纤拉曼放大器的光谱宽度为 5 0nm或2 5 0cm-1。
The working principle of the distributed Raman gain amplifier is discussed. Using the 132 0nm solid state laser as the pump source, the light amplification near the 1410nm band is obtained. When the single mode GI fiber length is 23km, the Raman gain The effective length of optical fiber is 15.5km and 10.5km respectively when the peak power of pump pulse is 50W and 30W, respectively. With the different effective length of optical fiber, the gain of Raman amplifier And the pumping power. The spectral width of the fiber Raman amplifier is estimated to be 50nm or 250cm-1 from the Raman spectrum of the fiber.