Optical switch

Details Optical switch Optical switch

2006-11-07

2006-11-07

Lee, John D. (Department: 2874)

Optical waveguides

Polarization without modulation

C385S016000

Reexamination Certificate

active

07133581

ABSTRACT:
The present invention provides an optical switch whose operational characteristics do not change, and which is not affected by polarization cross talk, even when the wavelength of a signal light or the ambient temperature of the optical switch varies. The optical switch comprises first and second polarization splitting/combining modules, (10,18), first and second polarization-maintaining single-mode fibers (12, 16), a first polarization plane conversion portion (14), third and fourth polarization-maintaining single-mode fibers (22, 26), and a second polarization plane conversion portion (24).

REFERENCES:
patent: 6587608 (2003-07-01), Cormack
patent: 6870974 (2005-03-01), Watanabe
patent: 6963675 (2005-11-01), Watanabe
“Ultrafast optical multi/demultiplexer utilizing optical Kerr effect in polarization-maintaining single-mode fibres”, T. Morioka et al., Electronic Letters, vol. 23, No. 9, pp. 453-454, Apr. 1987.

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