Wavelength tunable light source
US6850545B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 2001 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Jan 22, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/143
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is provided a wavelength tunable light source 10 in which one end surface 1a of a semiconductor laser 1 is applied anti-reflection film, a lens 6 collimates a light beam emitted from the one end surface 1a of the semiconductor laser 1 onto which the anti-reflection film is applied, and a wavelength selection portion constituted by a combination of a diffraction grating 2 and a mirror 3 selects a light beam having a desired wavelength to return the selected light to the semiconductor laser 1 to make laser oscillation. A center of rotation of the mirror 3 is provided in a position P0 where mode hopping can be suppressed when the wavelength is tuned and rotation of the mirror 3 is driven by a direct drive system by using a motor 4 having a rotation shaft 4a in the center of rotation of the mirror 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.