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Wavelength locker with liquid crystal tunable filter generating transmitted and reflected outputs

  • US 7,221,429 B1
  • Filed: 11/21/2003
  • Issued: 05/22/2007
  • Est. Priority Date: 06/02/2003
  • Status: Expired due to Term
First Claim
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1. A wavelength locker system, comprising:

  • an optical tap placed in the optical path of a laser transmitter for splitting a laser signal into a tapped signal and a laser output signal,a free space tunable filter accepting the tapped signal and producing two signals that add to form a representation of the tapped signal,photodetectors coupled to the tunable filter, said photodetectors being configured to capture each of said signals output from said tunable filter and to produce two electrical signals that represent the power intensity of each of said two signals output from the tunable filter, andan electronics unit configured to accept the two electrical signals produced by the photodetectors and to generate a feedback signal in response thereto.

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