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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 26,
  • Issue 5,
  • pp. 588-599
  • (2008)

Generation of a CW Local Oscillator Signal Using a Stabilized Injection Locked Semiconductor Laser

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Abstract

We explore the technique of injection locking a semiconductor laser with a portion of the received optical signal to regenerate a local oscillator for eventual use with a homodyne receiver. In addition, we show that the injection locking process can be electronically stabilized by using the Modulation Transfer Ratio (MTR) of the slave laser as a monitor, given either a DFB or Fabry–Pérot slave laser. We show that this stabilization technique maintains injection lock (given a locking range of ~1 GHz) for laser drift much greater than what is expected in a typical transmission system. In addition, we explore the quality of the output of the slave laser, and analyze its suitability as a local oscillator signal for a homodyne receiver.

© 2008 IEEE

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