光子学报, 2009, 38 (12): 3057, 网络出版: 2010-05-10
全光纤瓦级纳秒脉冲掺Yb放大器
All-fiber Watt-level Nanosecond Pulsed Yb-doped Fiber Amplifier
光纤放大器 级联波分复用器 脉冲放大 隔离度 信噪比 信号增益 Fiber amplifier Cascaded wavelength division multiplexing Pulse amplification Isolation Signal to noise ratio Gain of signal
摘要
采用单模放大和包层抽运放大的级联方式，在主振荡功率放大系统中，将平均功率0.5 mW、脉宽20 ns以及重复频率为50 kHz的光脉冲安全放大到平均功率0.6 W、峰值功率600 W的脉冲输出.相应增益为30.8 dB.放大输出的脉冲信号信噪比为30 dB，脉冲形状基本没有发生畸变.在前置放大结构中抽运光通过级联熔融拉锥型波分复用器耦合，有效确保了抽运源(976 nm)的正常工作.
Abstract
The fiber-based amplification of a commercially packaged,fiber pigtailed pulsed diode laser operating at wavelength of 1 064 nm (bandwidth of 0.45 nm) was reported.The cascaded Yb-doped fiber amplifier could operate safely by using cascaded fused wavelength division multiplexing (WDM) in each single-mode amplification stage.The total isolation of cascaded WDM could protect the laser diodes from being destroyed by feedback of pump/signal power.At repetition rate of 50 kHz,pulse duration of 20 ns and average power of 0.5 mW,output power up to 0.6 W and peak power up to 600 W were obtained,with a high signal to noise ratio of 30 dB.The gain of the whole system is 30.8 dB and pulse distortion is not been observed.
刘丰年, 徐玲玲, 范万德, 黄榜才, 姜明顺, 刘波, 开桂云, 袁树忠. 全光纤瓦级纳秒脉冲掺Yb放大器[J]. 光子学报, 2009, 38(12): 3057. LIU Feng-nian, XU Ling-ling, FAN Wan-de, HUANG Bang-cai, JIANG Ming-shun, LIU Bo, KAI Gui-yun, YUAN Shu-zhong. All-fiber Watt-level Nanosecond Pulsed Yb-doped Fiber Amplifier[J]. ACTA PHOTONICA SINICA, 2009, 38(12): 3057.
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