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Optical feedback locking of semiconductor lasers

  • US 4,907,237 A
  • Filed: 10/18/1988
  • Issued: 03/06/1990
  • Est. Priority Date: 10/18/1988
  • Status: Expired due to Fees
First Claim
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1. A stabilized semiconductor diode laser system comprising:

  • a semiconductor diode laser that emits a beam along a first axis;

    said laser having a laser optical field and a carrier densityan optical resonator means, located external to said laser, having a resonator frequency, and including an input port for receiving said laser beam and an output port through which a beam exits said resonator means, said resonator means for producing an enhanced optical output at said output port only when an optical beam supplied at said input port has a frequency substantially equal or exactly equal to said resonant frequency;

    first means for optically coupling at least a portion of said beam to said input port; and

    second means for optically coupling said output port to said laser as a positive optical feedback thereto whereby inherent coupling of the laser optical field to the carrier density of said laser results in a locking of the laser output frequency.

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