Planar lightwave circuit for conditioning tunable laser output
US6735224B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2001 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Jan 30, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/18361
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A planar lightwave circuit (PLC) module for conditioning light output from a tunable laser designed to generate light at a target wavelength. The PLC module has a substrate; a primary waveguide embedded in said substrate, said primary waveguide having an input end for receiving light from the tunable laser and an output end for outputting said light; and at least a first secondary waveguide embedded in said substrate, said first secondary waveguide receiving a first portion of said light from the tunable laser. A filter having a passband centered on the target wavelength is coupled to an output of the first secondary waveguide to receive said first portion of light, and generates a signal related to the intensity of said first portion of light in the passband centered on the target wavelength. This may be used by a processor and associated laser control circuitry for wavelength locking purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.