Wavelength stabilization for broadband light sources
US7326915B2 · kind B2 · utility
16Cited by
4References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2005 |
| Grant date | Feb 5, 2008 |
| Priority date | — |
| Expiry date | Apr 20, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/042
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A broadband light source, such as a light-emitting diode (LED), such as a superluminescent light-emitting diode (SLED), has its mean wavelength stabilized by using a filter to pass a characteristic of the output of the source, detecting the filtered output, and adjusting a parameter affecting the wavelength of the source, such as drive current or temperature. A Gaussian or near-Gaussian filter can be used to obtain an intensity detection, or two narrowband filters can be used where one filter passes a wavelength greater, and one passes a wavelength less, than the desired mean wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.