High power laser array with stable wavelength
US5022042A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1990 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Sep 10, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A semiconductor diode laser is aligned to a waveguide with two sections, a first section being a passive low-loss waveguide and a second section being a Bragg grating. The first section works to increase the total cavity length l of the laser by about 1 to 2 cm. The lengthening of the cavity reduces the longitudinal mode spacing .DELTA..lambda. according to the equation .DELTA..lambda.=.lambda..sup.2 /2nl, and provides a higher average output power level because it is substantially immune to mode hop-induced fluctuations. The second section causes the output to be centered at the desired wavelength depending on the grating spacing. An array of diode lasers with an array of waveguides as described above provides a high power source with a controlled bandwidth. The high power laser array with stabilized output wavelength is used to pump a solid state laser crystal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.