OPTICAL SWITCH AND OPTICAL TEST APPARATUS
First Claim
1. An optical switch comprisinga first distributed-coupling type optical coupler having a first optical waveguide and a second optical waveguide arranged in parallel with each other that outputs an input light inputted to an input end of the first optical waveguide from an output end of either the first optical waveguide or the second optical waveguide as output light;
- a first electrode that applies an electric field corresponding to the first input voltage to the first optical waveguide and the second optical waveguide and controls whether the input light inputted to the first optical coupler is outputted as the output light based on the first input voltage; and
a phase modulation reducing section that reduces the phase change of the output light in accordance with the change of the electric field applied to the first optical waveguide and the second optical waveguide.
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Accused Products
Abstract
An optical switch is provided. The optical switch includes: a first distributed-coupling type optical coupler having a first optical waveguide and a second optical waveguide arranged in parallel with each other that outputs an input light inputted to an input end of the first optical waveguide from an output end of either the first optical waveguide or the second optical waveguide as output light; a first electrode that applies an electric field corresponding to the first input voltage to the first optical waveguide and the second optical waveguide and controls whether the input light inputted to the first optical coupler is outputted as the output light based on the first input voltage; and a phase modulation reducing section that reduces the phase change of the output light in accordance with the change of the electric field applied to the first optical waveguide and the second optical waveguide.
52 Citations
16 Claims
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1. An optical switch comprising
a first distributed-coupling type optical coupler having a first optical waveguide and a second optical waveguide arranged in parallel with each other that outputs an input light inputted to an input end of the first optical waveguide from an output end of either the first optical waveguide or the second optical waveguide as output light; -
a first electrode that applies an electric field corresponding to the first input voltage to the first optical waveguide and the second optical waveguide and controls whether the input light inputted to the first optical coupler is outputted as the output light based on the first input voltage; and a phase modulation reducing section that reduces the phase change of the output light in accordance with the change of the electric field applied to the first optical waveguide and the second optical waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An optical test apparatus comprising
a light emitting section that emits light; -
a pulse generator that generates a pulse signal; an optical switch that switches whether the light emitted from the light emitting section is outputted based on the pulse signal; a directional coupler that inputs the light outputted from the optical switch to an external optical waveguide and acquires a reflected light from the external optical waveguide; and a phase detecting section that detects the phase of the reflected light acquired from the external optical waveguide, the optical switch including; a first distributed-coupling type optical coupler having a first optical waveguide and a second optical waveguide arranged in parallel with each other that outputs an input light inputted to an input end of the first optical waveguide from an output end of either the first optical waveguide or the second optical waveguide as output light; a first electrode that applies an electric field corresponding to the first input voltage to the first optical waveguide and the second optical waveguide and controls whether the input light inputted to the first optical coupler is outputted as the output light based on the first input voltage; and a phase modulation reducing section that reduces the phase change of the output light in accordance with the change of the electric field applied to the first optical waveguide and the second optical waveguide. - View Dependent Claims (16)
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Specification