High-reliability MXN fiber optic switches

Details High-reliability MXN fiber optic switches High-reliability MXN fiber optic switches

1997-07-28

1999-02-02

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Switch

385 16, 385 17, 385 36, 385 47, G02B 636

Patent

active

058676171

ABSTRACT:
Optic switches manipulate an optical signal that has been expanded by a collimating lens. Switching is effected by introducing a prism between collimating lenses to redirect the optical signal to an alternative lens. The prism preferably has a cross-section defining a parallelogram, so that the optical signal is reflected twice within the prism to minimize cross-sectional distortion and avoid spectral effects. A circuit provides feedback on the actual position of the relay and prism for fault detection and diagnosis.

REFERENCES:
patent: 4239332 (1980-12-01), Inbar
patent: 4378144 (1983-03-01), Duck et al.
patent: 4611885 (1986-09-01), Boirat
patent: 4641915 (1987-02-01), Asakawa et al.
patent: 5359683 (1994-10-01), Pan
patent: 5420946 (1995-05-01), Tsai
patent: 5436986 (1995-07-01), Tsai
patent: 5444801 (1995-08-01), Laughlin

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