Laser device
US10637205B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 2017 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Nov 1, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4012
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.