Grin lens based astigmatism correcting optical coupler

Details Grin lens based astigmatism correcting optical coupler Grin lens based astigmatism correcting optical coupler

2005-02-01

2005-02-01

Dang, Hung Xuan (Department: 2873)

Optical waveguides

With optical coupler

C385S033000

Reexamination Certificate

active

06850659

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.

REFERENCES:
patent: 5802224 (1998-09-01), Okuta et al.
Zemax, Optical Design Program, User's Guide, Version 10.0, Focus Software, Inc., Apr. 2001, 13 pp.

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