High-accuracy wavelength stabilization of angled-stripe super luminescent laser diode sources
US5008889A · kind A · utility
19Cited by
6References
26Claims
0Family size
Inventor
Key dates
| Filing date | Nov 6, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Nov 6, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/042
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An angled-stripe superluminescent laser diode (SLD) light source emits both coherent and incoherent radiation simultaneously, but the two beams are separated spatially. A method and apparatus for stabilizing the emission wavelength of a broadbent light source for a fiber-optic rotation-sensing gyro uses the coherent radiation from an angled-stripe SLD as the optical source in a large-optical-pathlength-difference interferometer to generate an error signal which is fed back to the current source of the SLD to stabilize the wavelength of the incoherent part of the SLD light output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.