Method and system for forming an optical fiber microlens

Details Method and system for forming an optical fiber microlens Method and system for forming an optical fiber microlens

1996-10-07

1998-09-01

Kunemund, Robert

Adhesive bonding and miscellaneous chemical manufacture

Differential fluid etching apparatus

With microwave gas energizing means

216 11, 216 24, 216 26, 216 91, C03C 2506

Patent

active

058006664

ABSTRACT:
A method and system for forming microlens (78) on an optical fiber (60) include optical fiber lensing device (10) having lowering mechanism (18) for inserting optical fiber (60) at a predetermined and controlled speed to a predetermined depth in oil-acid bath having oil layer (62), acid layer (64), and boundary (68) between oil layer (62) and acid layer (64). The next step is to etch optical fiber (60) at boundary (68) by forming meniscus (66) around optical fiber (60) to selectively and controllably form on optical fiber (60) a microlens (78) having a predetermined shape, preferably a hyperbolic shape. The etching includes the steps of first tapering optical fiber (60) to a shape determined by the distance that optical fiber (60) is first inserted into acid layer (64). The etch step further chemically mills microlens (78) on optical fiber (60) to the predetermined shape by controlling the etch time and position of optical fiber (60) relative to boundary (68) for etching optical fiber (60) at boundary (68).

REFERENCES:
patent: 4265699 (1981-05-01), Ladany
patent: 4469554 (1984-09-01), Turner
patent: 5011254 (1991-04-01), Edwards et al.
patent: 5101457 (1992-03-01), Blonder et al.
patent: 5290398 (1994-03-01), Feldman et al.
patent: 5598493 (1997-01-01), Bonham, Jr. et al.

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