Grin lens based astigmatism correcting optical coupler
US6850659B2 · kind B2 · utility
12Cited by
1References
35Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 21, 2002 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Jul 25, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An astigmatism-correcting coupler includes a collimating lens for collimating a beam of coherent light output from a laser, a power adjusting lens for reducing any astigmatism of the collimated beam of coherent light output, and a focusing lens for focusing the collimated beam of coherent light output into an optical fiber. The focusing lens is a graded-index (GRIN) focusing lens that is cylindrically polished to have different focal powers in lateral and transverse planes. The cylindrical polished GRIN focusing lens corrects for astigmatic effects by adjusting the power of the light output on the transverse and lateral planes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.