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2018 Volume 27 Issue 7
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Ning Ru, Yu Wang, Hui-Juan Ma, Dong Hu, Li Zhang, Shang-Chun Fan. 2018: Flexible control of semiconductor laser with frequency tunable modulation transfer spectroscopy, Chinese Physics B, 27(7): 363-367. doi: 10.1088/1674-1056/27/7/074201
Citation: Ning Ru, Yu Wang, Hui-Juan Ma, Dong Hu, Li Zhang, Shang-Chun Fan. 2018: Flexible control of semiconductor laser with frequency tunable modulation transfer spectroscopy, Chinese Physics B, 27(7): 363-367. doi: 10.1088/1674-1056/27/7/074201
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Flexible control of semiconductor laser with frequency tunable modulation transfer spectroscopy

  • School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China;Key Laboratory for Metrology, Changcheng Institute of Metrology and Measurement, Beijing 100095, China

  • Key Laboratory for Metrology, Changcheng Institute of Metrology and Measurement, Beijing 100095, China

  • School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China

  • Available Online: 01/01/2018
  • Fund Project: the National Key Scientific Instrument and Equipment Development Project, China (Grant 2014YQ35046103)
  • We introduce a new method of simultaneously implementing frequency stabilization and frequency shift for semicon-ductor lasers. We name this method the frequency tunable modulation transfer spectroscopy (FTMTS). To realize a stable output of 780 nm semiconductor laser, an FTMTS optical heterodyne frequency stabilization system is constructed. Before entering into the frequency stabilization system, the probe laser passes through an acousto-optical modulator (AOM) twice in advance to achieve tunable frequency while keeping the light path stable. According to the experimental results, the frequency changes from 120 MHz to 190 MHz after the double-pass AOM, and the intensity of laser entering into the system is greatly changed, but there is almost no change in the error signal of the FTMTS spectrum. Using this signal to lock the laser frequency, we can ensure that the frequency of the laser changes with the amount of AOM shift. Therefore, the magneto-optical trap (MOT)-molasses process can be implemented smoothly.
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Flexible control of semiconductor laser with frequency tunable modulation transfer spectroscopy

  • Available Online: 01/01/2018

Abstract: We introduce a new method of simultaneously implementing frequency stabilization and frequency shift for semicon-ductor lasers. We name this method the frequency tunable modulation transfer spectroscopy (FTMTS). To realize a stable output of 780 nm semiconductor laser, an FTMTS optical heterodyne frequency stabilization system is constructed. Before entering into the frequency stabilization system, the probe laser passes through an acousto-optical modulator (AOM) twice in advance to achieve tunable frequency while keeping the light path stable. According to the experimental results, the frequency changes from 120 MHz to 190 MHz after the double-pass AOM, and the intensity of laser entering into the system is greatly changed, but there is almost no change in the error signal of the FTMTS spectrum. Using this signal to lock the laser frequency, we can ensure that the frequency of the laser changes with the amount of AOM shift. Therefore, the magneto-optical trap (MOT)-molasses process can be implemented smoothly.

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