Method of masked two stage lithium niobate proton exchange

Details Method of masked two stage lithium niobate proton exchange Method of masked two stage lithium niobate proton exchange

1989-10-11

1991-03-19

Lacey, David L.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 3013, 350 961, C03C 1500

Patent

active

050007742

ABSTRACT:
Lithium niobate is Li.sup.+ /H.sup.+ proton exchange in two stages. The first masked stage is a treatment with benzoic acid followed by a thermal treatment in oxygen at about 400.degree. C. The thermal treatment is followed by masking a second coincident area and treating that area in a second Li.sup.+ /H.sup.+ proton exchange with benzoic acid and lithium benzoate without altering the refractive index of the region outside the second area.

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patent: 4705346 (1987-11-01), Miyawaki
patent: 4725774 (1988-02-01), Davis et al.
patent: 4755014 (1988-07-01), Stoll et al.
patent: 4778236 (1988-10-01), Miyawaki
patent: 4799750 (1989-01-01), Miyawaki

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