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Compensated broadband fiber light source with stable mean wavelength

  • US 9,683,830 B2
  • Filed: 12/10/2014
  • Issued: 06/20/2017
  • Est. Priority Date: 10/29/2014
  • Status: Active Grant
First Claim
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1. A fiber light source comprising:

  • a pump laser configured to generate a pump laser beam at a predetermined wavelength;

    a first segment of rare earth doped fiber;

    a second segment of rare earth doped fiber; and

    an optical coupler coupled to a first end of the first segment and a first end of the second segment, the optical coupler configured to split the pump laser beam based on a power coupling ratio such that a first portion of the pump laser beam is coupled to the first segment at a first power level and a second portion of the pump laser beam is coupled to the second segment at a second power level;

    wherein the first segment of rare earth doped fiber generates a first stimulated emission having a first mean wavelength sensitivity to pump laser power fluctuations and the second segment of rare earth doped fiber generates a second stimulated emission having a second mean wavelength sensitivity to pump laser power fluctuations such that, when the first stimulated emission is combined with the second stimulated emission, a combined stimulated emission is approximately insensitive to pump laser power fluctuations.

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