Optical system including multiplexed volume Bragg grating, methods, and applications
US9551830B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2015 |
| Grant date | Jan 24, 2017 |
| Priority date | — |
| Expiry date | Aug 28, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/08059
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of reversible spatial mode selection and conversion between waveguides and free space is presented using a multiplexed volume Bragg grating (MVBG). The MVBG has an inherent angular selectivity, providing different losses for different transverse modes and converting a higher order mode in waveguide to a single fundamental mode in free space. Using the device in a resonator allows for a pure higher order mode to be guided and amplified in the gain medium, to increase the mode area, to extract accumulated excitation more efficiently, and, therefore, to increase gain of the amplifier. In the same resonator, the device is able to convert the higher order mode to a high brightness Gaussian beam in free space or to a fundamental mode in a waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.