Fast axis thermal lens compensation for a planar amplifier structure
US11133639B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2018 |
| Grant date | Sep 28, 2021 |
| Priority date | — |
| Expiry date | Feb 15, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/2308
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Systems and methods described herein provide a thermally compensated waveguide structure having a thermal index profile configured to correct thermal aberrations caused by temperature gradients in a fast axis direction and/or correct other forms of distortions in an output beam generated by the waveguide structure. The waveguide structure includes a core region, one or more cladding, and one or more heat sinks. A geometry of these portions with respect to each other can provide a cold refractive index profile such that a cold refractive index value of a portion of the core region is less than a cold refractive index value of at least one of the one or more cladding regions. Responsive to thermal compensation, the cold refractive index profile is modified, through addition of a thermal index profile, to form a hot index profile having attributes including good overlap of the fundamental mode with the gain profile and mode clean-up through gain discrimination against higher order modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.