基于半导体激光器调制技术的978nm纳秒脉冲掺镱光纤激光器  

Nanosecond-Pulsed Yb-Doped Fiber Laser at 978 nm Based on Diode Laser Modulation Technique

作　　者：周冠锐 师红星[1] 金东臣 谭方舟[1] 刘江[1] 王潜[1] 王璞[1] 

机构地区：[1]北京工业大学激光工程研究院国家产学研激光技术中心,北京100124

出　　处：《中国激光》2016年第8期52-57,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金重大科研仪器研制项目(61527822);国家自然科学基金重点项目(61235010)

摘　　要：设计了一种基于半导体激光器调制技术的978nm纳秒脉冲掺镱全光纤激光器。该激光器采用主振荡功率放大结构，由调制半导体激光种子源和一级单模单包层掺镱光纤放大器组成。半导体激光种子源的光谱中心波长通过种子光自注入方式被定义为978．3nm，调制之后的激光脉冲宽度为4．5ns，重复频率在10～50MHz范围内可调。当半导体激光种子源调制重复频率为50MHz时，种子光被一级单包层掺镱光纤放大器放大至115mw，相应的激光中心波长为978．3nm，3dB光谱带宽为0．11nm，放大之后光谱中没有出现明显的放大自发辐射现象。Based on diode laser modulation technique, a 978 nm nanosecond-pulsed Yb-doped fiber laser is designed. The structure of the laser is master oscillator power amplifier. The laser system consists of the seed of modulated laser diode and one stage Yb-doped fiber amplifier with single-mode and single-cladding. The spectral central wavelength of laser diode seed is set as 978.3 nm by self-seeding. The laser pulse width after modulation is 4.5 ns and the repetition frequency is tunable at 10-50 MHz. The seed light is amplified to 115 mW by one stage Yb- doped fiber amplifier with single-cladding when the repetition frequency of laser diode seed modulation is 50 MHz. The corresponding central wavelength of the laser is 978.3 nm, 3 dB spectral bandwidth is 0.11 nm. The obvious amplified spontaneous emission does not appear in the spectrum after amplification.

关 键 词：激光器 光纤放大器 半导体激光器调制 掺镱光纤 

分 类 号：TN248[电子电信—物理电子学]