OPTICAL AMPLIFIER AND AN OPTICAL AMPLIFICATION METHOD
First Claim
1. An optical amplifier comprising:
- a waveguide path configured to transmit an optical signal;
an optical amplification unit formed on the waveguide path and configured to amplify the optical signal by an excitation light;
an irradiation unit configured to irradiate the excitation light to the optical amplification unit;
an optical detection unit configured to detect a light and generate an electric signal which corresponds to the detected light;
a branching unit configured to branch an evanescent light being the optical signal outputted from the optical amplification unit to the waveguide path and leaked outside the waveguide path, and focus the evanescent light on the optical detection unit;
a wavelength detection unit configured to detect a wavelength multiplicity of the optical signal based on the evanescent light detected by the optical detection unit; and
a light amount adjustment unit configured to adjust a light amount of the excitation light irradiated by the irradiation unit based on the wavelength multiplicity.
1 Assignment
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Accused Products
Abstract
An optical amplifier using the evanescent light to control the optical output level is provided. The optical amplifier includes: a waveguide path transmitting an optical signal; an optical amplification unit formed on the waveguide path and amplifying the optical signal by an excitation light; an irradiation unit irradiating the excitation light to the optical amplification unit; an optical detection unit generating an electric signal which corresponds to a detected light; a branching unit branching an evanescent light being the optical signal outputted from the optical amplification unit and leaked outside the waveguide path, and focusing the evanescent light on the optical detection unit; a wavelength detection unit detecting a wavelength multiplicity of the optical signal based on the detected evanescent light; and a light amount adjustment unit adjusting a light amount of the excitation light irradiated by the irradiation unit based on the wavelength multiplicity.
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Citations
7 Claims
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1. An optical amplifier comprising:
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a waveguide path configured to transmit an optical signal; an optical amplification unit formed on the waveguide path and configured to amplify the optical signal by an excitation light; an irradiation unit configured to irradiate the excitation light to the optical amplification unit; an optical detection unit configured to detect a light and generate an electric signal which corresponds to the detected light; a branching unit configured to branch an evanescent light being the optical signal outputted from the optical amplification unit to the waveguide path and leaked outside the waveguide path, and focus the evanescent light on the optical detection unit; a wavelength detection unit configured to detect a wavelength multiplicity of the optical signal based on the evanescent light detected by the optical detection unit; and a light amount adjustment unit configured to adjust a light amount of the excitation light irradiated by the irradiation unit based on the wavelength multiplicity. - View Dependent Claims (2, 3, 4, 5)
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6. An optical amplifying method comprising:
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amplifying an optical signal which transmits through a waveguide path by an excitation light by an optical amplification unit formed on the waveguide path; irradiating the excitation light to the optical amplification unit; detecting a light and generate an electric signal which corresponds to the detected light by an optical detection unit; branching an evanescent light being the optical signal outputted from the optical amplification unit to the waveguide path and leaked outside the waveguide path; focusing the evanescent light on the optical detection unit; detecting a wavelength multiplicity of the optical signal based on the evanescent light detected by the optical detection unit; and adjusting a light amount of the excitation light irradiated by the irradiation unit based on the wavelength multiplicity. - View Dependent Claims (7)
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Specification