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Broadband or mid-infrared fiber light sources

  • US 9,077,146 B2
  • Filed: 02/21/2014
  • Issued: 07/07/2015
  • Est. Priority Date: 11/18/2005
  • Status: Expired due to Fees
First Claim
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1. An optical system for use in material processing, the system comprising:

  • a plurality of semiconductor diodes, each of the diodes configured to generate an optical beam;

    a beam combiner configured to receive at least a portion of the optical beams from the plurality of semiconductor diodes and to generate a multiplexed optical beam; and

    a cladding-pumped fiber amplifier or laser configured to receive at least a portion of the multiplexed optical beam and to form an intermediate beam having at least a first wavelength;

    an optical element configured to receive at least a portion of the intermediate beam and to form an output beam with an output beam wavelength, wherein at least a portion of the output beam wavelength is longer than at least a portion of the first wavelength; and

    a subsystem comprising one or more lenses or mirrors configured to receive a received portion of the output beam and to deliver a delivered portion of the output beam to a sample, wherein the delivered portion of the output beam has a temporal duration greater than approximately 30 picoseconds, wherein the delivered portion of the output beam has a repetition rate between continuous wave and Megahertz or higher, wherein a time averaged output power of the output beam is about 20 mW or more, and wherein a time averaged intensity of the delivered portion of the output beam is less than approximately 50 MW/cm2.

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