Cost-effective high precision wavelength locker
US6411634B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1998 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Nov 12, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/572
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A system and method for providing a wavelength locker is disclosed. In one aspect, the method and system include providing a reflector, a first filter, and a second filter. The reflector is for receiving an optical signal, transmitting a first portion of the optical signal, and reflecting a second portion of the optical signal. The first filter is for receiving the first portion and transmitting a third portion of the optical signal. The first filter includes a first axis and is capable of being tuned by rotation around the first axis to transmit the third portion including a particular wavelength. The second filter is for receiving the third portion and transmitting a fourth portion of the optical signal. The second filter includes a second axis substantially perpendicular to the first axis and is capable of being tuned by rotation around the second axis to transmit the fourth portion including the particular wavelength. In one aspect, the method and system also include photodetectors to receive the second and fourth portions of the optical signal. The photodetectors can measure a change in the wavelength of the optical signal from the particular wavelength using intensities of th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.