Use of the faraday effect for frequency stabilization and control of a semiconductor laser

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Published
1993-01
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  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/ecjb.4420760501
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Wiley

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<jats:title>Abstract</jats:title><jats:p>To date, frequency stabilization methods for semiconductor lasers mainly use the absorption line of an atom or molecule to modulate the frequency of laser light slightly so as to obtain a control signal. As a result, an oscillation bandwidth broadening will appear and the stabilization point will be restrained at the center frequency of the absorption line. This paper reports a frequency stabilization method using a magneto‐optical effect, the Faraday effect of an atomic absorption line, instead of direct modulation of the oscillation frequency. This stabilization method made it possible to control the stabilization point frequency by changing the dc magnetic field. With an Rb absorption line as the frequency reference, the controlled frequency range was about 1.5 GHz, which is wider than the Doppler width of the Rb absorption line at room temperature. The experimental results were consistent with the theoretical analysis.</jats:p>

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