Monolithic temperature stabilized optical tuning circuit for channel separation in WDM systems utilizing tunable lasers
US4993032A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Dec 28, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/06255
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The feedback control loop for temperature stabilization of a tunable diode laser consists of a series of lenses or gratings and a detector array disposed in the optical path. The lenses or gratings of the feedback loop are formed in a planar optical waveguide which is temperature stabilized, being fabricated from a plurality of dielectric materials which have approximately equal and opposite changes in refractive index with temperature. Light from a tunable diode laser is input into the loop and is collimated, deflected, and focused onto a portion of the detector array depending on the wavelength of the light. Each detector within the array corresponds to a given wavelength. The detector converts the detected wavelength into an electrical signal which is fed back to the laser phase control to provide tuning to the desired channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.