Wavelength locker
US10670939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2017 |
| Grant date | Jun 2, 2020 |
| Priority date | — |
| Expiry date | Jul 10, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Conventionally, wavelength locking and monitoring has been achieved used various components, including calibrated etalon filters, gratings, and arrays of color filters, which offer fairly bulky solutions that require complicated controls. An improved on-chip wavelength monitor comprises: a combination comb filter comprising a plurality of comb filters, each for receiving a test beams, and each comb filter including a substantially different FSR, e.g. 10× to 20× the next closest FSR. A controller dithers a phase tuning section of each comb filter to generate a maximum or minimum output in a corresponding photodetector indicative of the wavelength of the test signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.