• Infrared and Laser Engineering
  • Vol. 33, Issue 3, 253 (2004)
[in Chinese]1、2、*, [in Chinese]1, [in Chinese]2, and [in Chinese]2
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    DOI: Cite this Article
    [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Long distance microvibration measurement using external-cavity semiconductor laser[J]. Infrared and Laser Engineering, 2004, 33(3): 253 Copy Citation Text show less

    Abstract

    With Littrow-type external-cavity grating and temperature controlling, the spectral line width is compressed to be less than 1.2 MHz (Δλ<3.5×10~(-6) nm), while the original linewidth of the semiconductor laser is broader than 1200 GHz. Based on this, the system for measuring the amplitude and frequency of the microvibration with sinusoidal modulation is designed, detecting effect is good.