Optical switch

Details Optical switch Optical switch

2007-09-11

2007-09-11

Wong, Tina M (Department: 2874)

Optical waveguides

Directional optical modulation within an optical waveguide

C385S003000, C385S016000

Reexamination Certificate

active

11313655

ABSTRACT:
In order to provide a low-loss optical switch that is low in power consumption by providing the same as a self-holding type, and high speed and highly practicable, an optical switch of the present invention is composed of a quartz substrate (101), first and second input waveguides (102aand102b), a first directional coupler (103), first and second arm waveguides (104aand104b) of a Mach-Zehnder interferometric circuit, a second directional coupler (105), first and second output waveguides (106aand106b), and a phase change material portion (100). A control light (for an amorphous to crystal transition) pulse (pulse width: 20 ns, pulse intensity: 5 mW) having a wavelength of 0.78 microns is irradiated. As a result of the control light pulse irradiation, the phase change material portion (109) changes in phase to a crystal state, and the optical switch transits to a bar condition.

REFERENCES:
patent: 6844042 (2005-01-01), Ma et al.
patent: 2001/0014061 (2001-08-01), Ueyanagi
patent: 2002/0181822 (2002-12-01), Doerr et al.
patent: 2004/0096144 (2004-05-01), Ramalingam et al.
patent: 62-295005 (1987-12-01), None
patent: 4-304414 (1992-10-01), None
F. Ebisawa, et al.; “Self-Holding Optical Switch using a silica-based optical integrated Mach-Zehnder interferometer with a Photochromic Cladding Poymer,”The Institute of Electronics, Information and Communication Engineers, Technical Report of IEICE; vol. 96; No. 284; OME96-64; Oct. 1996; pp. 31-36./Discussed in the specification.

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