Optical waveguides – With optical coupler – Switch
Patent
1991-05-17
1992-03-10
Ullah, Akm
Optical waveguides
With optical coupler
Switch
G02B 610, G02B 626
Patent
active
050955152
ABSTRACT:
An optical switch which comprises a photoelastic, optically transparent material whose index of refraction is changed by stress and which propagates an optical beam or beams from an inlet window to an outlet window in the material, with the inlet window adapted to receive an optical beam from an optical source and the outlet window adapted to pass an optical beam from the photoelastic material to an optical output receptor, and a receptor means of applying a stress gradient to said photoelastic material to change the index of refraction and hence, the optical path of the optical beam between a normal, unstressed optical beam path and a bent, stressed optical beam path. Optical systems are described in which the optical switch is employed to form optical lenses wherein an optical beam is focused by stress within an optical material, such as a photoelastic cylindrical rod. Optical integrated systems are also described employing the optical switch with optical devices as an optical integrated module.
REFERENCES:
patent: 4684215 (1987-08-01), Shaw et al.
patent: 4735485 (1988-04-01), Fesler
patent: 4792207 (1988-12-01), Shaw et al.
patent: 4793676 (1988-12-01), Risk
patent: 5016957 (1991-05-01), Seaver
Crowley Richard P.
Ullah Akm
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