Optical coupler 2.times.2 optical switch and method for optical

Details Optical coupler 2.times.2 optical switch and method for optical Optical coupler 2.times.2 optical switch and method for optical

1996-06-24

1998-08-18

Lee, John D.

Optical waveguides

With optical coupler

Switch

385 25, 385 40, 385 50, G02B 635

Patent

active

057968861

ABSTRACT:
The present invention relates to an optical coupler 2.times.2 optical switch which can efficiently shorten the length of device by employing a cantilever and a movable optical waveguide and a method for optical switching with the optical coupler 2.times.2 optical switch. An optical coupler 2.times.2 optical switch of the present invention comprises: an optical coupler in which two fixed optical waveguides are provided on a substrate; an optical waveguide positioned between the fixed optical waveguides, which is moved up and down; and, a cantilever which is linked to the optical waveguide to move the optical waveguide up and down by the voltage applied to electrodes. Since the coupling length of the optical coupler(22) is changed depending on the distance between the fixed optical waveguides(21, 21') and the optical waveguide(23), length(D) of the optical, coupler(22) can be shortened to a great extent compared to the prior art optical coupler 2.times.2 optical switch, and the insertion loss of the device in the construction of optical communication system can be lowered significantly and optical switching can be carried out with a good performance.

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