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Study of blaze grating feedback external-cavity semiconductor laser with narow-linewidth

Xie Fu-zeng

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Abstract

Based on the discussion of linewidth-narrowing of the semiconductor laser,experimental results of external cavity semiconductor laser with narrow-linewidth are reported.With a blaze grating offering external feedback,strong coupled external cavity for a commercial semiconductor laser can improve the output characteristics of 949.6nm semiconductor laser.Its side mode suppression ratio is more than 30dB,and spectrum linewidth is narrower than 3.6×10~(-6)nm.The experiment shows that the strong feedback can improve the dynamical characteristics of an external cavity semiconductor laser.

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What this paper is about

Based on the discussion of linewidth-narrowing of the semiconductor laser,experimental results of external cavity semiconductor laser with narrow-linewidth are reported.With a blaze grating offering external feedback,strong coupled external cavity for a commercial semiconductor laser can improve the output characteristics of 949.6nm semiconductor laser.Its side mode suppression ratio is more than 30dB,and spectrum linewidth is narrower than 3.6×10~(-6)nm.The experiment shows that the strong feedback can improve the dynamical characteristics of an external cavity semiconductor laser.

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Available abstract

Based on the discussion of linewidth-narrowing of the semiconductor laser,experimental results of external cavity semiconductor laser with narrow-linewidth are reported.With a blaze grating offering external feedback,strong coupled external cavity for a commercial semiconductor laser can improve the output characteristics of 949.6nm semiconductor laser.Its side mode suppression ratio is more than 30dB,and spectrum linewidth is narrower than 3.6×10~(-6)nm.The experiment shows that the strong feedback can improve the dynamical characteristics of an external cavity semiconductor laser.

Key concepts: Laser linewidth, Semiconductor, Laser, Semiconductor laser theory, Optics, Distributed feedback laser, Grating, Materials science

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