Optical coupler using anamorphic microlens

Details Optical coupler using anamorphic microlens Optical coupler using anamorphic microlens

1998-03-06

2000-02-15

Ngo, Hung N.

Optical waveguides

With optical coupler

Input/output coupler

385 88, G02B 632

Patent

active

060262060

ABSTRACT:
An optical coupling arrangement comprises conventional focusing optics and an anamorphic (i.e., radially non-symmetric) lens positioned at the entrance to the optical fiber. The objective lens focuses the elliptical beam exiting a laser source and the anamorphic lens functions to change the beam mode from elliptical to circular. The positioning of the anamorphic lens at the fiber input (instead of the laser output) reduces the alignment tolerance problems associated with prior art arrangements.

REFERENCES:
patent: 5701373 (1997-12-01), Oleskevich
patent: 5745625 (1998-04-01), Aikiyo et al.
J.J. Snyder et al., "Fast diffraction-Limited cylindrical microlenses", Applied Optics, vol. 30, No. 19, Jul. 1991, p. 2743.
J.J. Synder et al., "Fast, inexpensive, diffraction limited cylindrical microlenses", SPIE, vol. 1544, 1991, p. 146.
S.W. Connely et al., "Diffraction Limited Virtual Point Source Microlenses", SPIE, vol. 2383, 1995, p. 252.
J. Braat, "Design of beam shaping optics", Applied Optics, vol. 34, No. 15, May 1995, p. 2665.

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