Laser oscillator and filtering method
US8218585B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 2010 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Jan 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/08045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a fiber laser including a mode filter for selectively attenuating, among modes included in laser light propagating through a multi-mode fiber, any mode other than a radially polarized mode. Among the modes included in the laser light propagating through the multi-mode fiber, the fiber laser causes the radially polarized mode to resonate, so as to emit radially polarized laser light. The mode filter includes a long-period fiber grating obtained by writing, to a multi-mode fiber capable of guiding the radially polarized mode, a grating for selectively attenuating any waveguide mode other than the radially polarized mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.