0.02 nm带宽近衍射极限输出的双外腔反馈半导体激光器
Broad-area laser diode with 0.02 nm bandwidth and diffraction limited output due to double external cavity feedback
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摘要: 实验研究了宽接触条形双外腔反馈半导体激光器，在该激光器的输出表面镀增透膜，反馈是由高反射率平面镜和闪耀光栅组成，通过调整平面镜和光栅的倾斜角度，使得特定的空间模式和纵模注入半导体激光器，使之产生振荡，并抑制了激光腔内振荡的其他横模和纵模数，从而输出单瓣近衍射极限的激光束。同时在腔内插入标准具，使得输出激光线宽达到0.02 nm，输出功率在150 mW。输出光束的光束质量因子M2为1.16。
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关键词:
- 外腔注入 /
- 单瓣近衍射极限 /
- 宽接触条形半导体激光器
Abstract: External cavity feedback for a broad-area laser diode (BAL) with antireflection coating on the front facet was investigated experimentally. The feedback was created by a high-reflection mirror and a blazed grating, which reflected two parts of the laser emission back to the BAL, thereby forming an external resonator. When a Fabry-Perot etalon was inserted into the resonator, an output beam with a bandwidth of 0.02 nm and a power of 150 mW was obtained. The beam diffraction limited factor M2 is 1.16.-
Key words:
- external feedback /
- single diffraction limited /
- broad area laser diode
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