Thermal control of optical components
US7720328B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2008 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Sep 30, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/0286
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A linearized thermal and optical model of an optical integrated circuit can be used to temperature-stabilize one or more optical elements of the circuit using active temperature regulation. To stabilize a single optical element, a temperature sensor and a heater can be provided proximate to the grating. Thermal and optical coefficients can be then used to select an appropriate temperature set-point for the temperature controller that receives readings from the sensor and determines the power dissipated in the heater. Multiple optical elements can be stabilized individually, using the same process and lumping cross-heating factors together with other environmental factors. Alternatively, multiple AWG's can be stabilized using fewer sensors than optical elements, by stabilizing one of the optical elements in the same manner as in the case of a single optical elements, and determining power dissipated in the heaters of the remaining optical elements based on the linearized model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.