Wavelength reference apparatus and method
US7120176B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2002 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Jun 23, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4215
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Apparatus and methods usable for wavelength references and measurement of wavelength of a light beam. The apparatus comprise at least two wavelength reference or filter elements positioned in a light beam, each wavelength reference element having a different free spectral range and operable to define a joint free spectral range, and a detector positioned in the beam after the wavelength reference elements. The joint free spectral range provided by the multiple wavelength reference elements results in a joint transmission peak that is centered at a unique wavelength, and maximum optical power detectable from the beam by the detector occurs at the center wavelength of the joint transmission peak.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.