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LASER DEVICE

  • US 20180138654A1
  • Filed: 11/01/2017
  • Published: 05/17/2018
  • Est. Priority Date: 11/16/2016
  • Status: Active Grant
First Claim
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1. A laser device that outputs a laser beam by means of transmission through an optical fiber using a laser diode as a laser beam source or an excitation beam source, the laser device comprising:

  • at least one first photodetector that detects the quantity of a reflected beam being part of a reflected beam returning to the optical fiber of the laser device after being reflected off of a work and propagating mainly through a cladding of the optical fiber;

    at least one second photodetector that detects the quantity of a reflected beam being part of the reflected beam returning to the optical fiber and propagating mainly through a core of the optical fiber;

    a power supply unit that supplies a driving current to the laser diode; and

    a control unit that controls the power supply unit, whereinthe control unit controls the power supply unit in response to both an output from the first photodetector and an output from the second photodetector.

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