Broadband or mid-infrared fiber light sources

  • US 9,476,769 B2
  • Filed: 09/22/2015
  • Issued: 10/25/2016
  • Est. Priority Date: 11/18/2005
  • Status: Active Grant
First Claim
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1. An optical system comprising:

  • one or more tunable semiconductor light emitters configured to generate an input beam, wherein at least a portion of the input beam comprises a wavelength shorter than about 2.5 microns;

    one or more optical isolators coupled to the one or more tunable semiconductor light emitters and configured to substantially prevent a reflected light into the one or more tunable semiconductor light emitters;

    one or more optical amplifiers configured to receive at least a part of the portion of the input beam and to output an intermediate beam from one of the one or more optical amplifiers;

    one or more optical fibers configured to receive at least a portion of the intermediate beam and to form an output beam with an output beam wavelength;

    a subsystem comprising one or more lenses or mirrors configured to receive a received portion of the output beam, the one of more lenses or mirrors configured to deliver a delivered portion of the output beam to a sample, wherein the subsystem comprises an Optical Coherence Tomography (OCT) apparatus comprising a sample arm and a reference arm, wherein the delivered portion of the output beam has a pulse width greater than approximately 100 picoseconds, wherein the delivered portion of the output beam has a repetition rate between continuous wave and Megahertz or higher, and wherein an average intensity of the delivered portion of the output beam is less than approximately 50 MW/cm2; and

    a light detection system capable of collecting at least a fraction of the delivered portion of the output beam that reflects or transmits from the sample.

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