LASER DEVICE
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
To provide a laser device for adjusting a laser output by detecting the quantity of a reflected beam propagating within an optical fiber more accurately before an optical part is damaged due to an increase in quantity of the reflected beam. A laser device comprises: at least one first photodetector that detects the quantity of a reflected beam being part of a reflected beam returning to an 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 a laser diode; and a control unit that controls the power supply unit. The control unit controls the driving current to be supplied from the power supply unit to the laser diode in response to both an output from the first photodetector and an output from the second photodetector.
-
Citations
15 Claims
-
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, wherein the control unit controls the power supply unit in response to both an output from the first photodetector and an output from the second photodetector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
Specification