Variable optical attenuator assisted control of optical devices
US11646540B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 2020 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | Jul 23, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0085
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Variable optical attenuator assisted control of optical devices is provided. A device comprises: an uncooled laser and ring resonator modulator, an optical waveguide configured convey an optical signal of the laser from an input to an output, a heater that heats the ring resonator modulator, a variable optical attenuator that attenuates the optical signal on the optical waveguide, one or more power monitors and a controller. The controller is configured to: in response to determining that one or more of: heater power overhead is unavailable to reduce heater power for laser wavelength tracking; and the heater power is at or below a given lower heater power; and determining that that laser current is increased to assist with ring resonator modulator control for the laser wavelength tracking: control, using the one or more power monitors, attenuation of the VOA to control the output power into a target output power range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.