Optical fiber collimator using gradient index rod lens

Details Optical fiber collimator using gradient index rod lens Optical fiber collimator using gradient index rod lens

2005-05-31

2005-05-31

Lee, John R. (Department: 2881)

Optical waveguides

With optical coupler

Input/output coupler

C385S033000, C385S067000, C385S074000, C385S095000

Reexamination Certificate

active

06901186

ABSTRACT:
An optical fiber collimator using a gradient index rod lens for securing a required long opposing distance and easy handling. The collimator includes a single mode fiber and a gradient index rod lens for receiving an incident light from the single mode fiber and converting the incident light into a collimated light, or condensing an incident light and coupling the condensed incident light to the single mode fiber. A meandering period (pitch) of a ray determined by a refractive index distribution of the rod lens is decided. The gradient index rod lens has a lens length larger by 0.5 meandering periods than a minimum lens length required to obtain a predetermined opposing distance between a pair of the rod lenses.

REFERENCES:
patent: 2002/0094163 (2002-07-01), Ooyama et al.
patent: 2002/0168140 (2002-11-01), Asano et al.
patent: 2004/0114862 (2004-06-01), Taniyama et al.
patent: 0 370 663 (1990-03-01), None
patent: WO 01/11403 (2001-02-01), None
Selfoc Product Guide, (Sep. 1993).
Duncan T. Moore, Gradient Index Optics, XP-002194081,pp. 9.1-9.9, Chapter 9.

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