EP0527350A2
Expired / Lapsed
EP
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Optical demodulator
Assignee: Japan Science and Technology Agency
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Filing: 1992-07-15
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Granted: —
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Expires: 2012-07-15
Abstract
Abstract An optical demodulator comprises a nonlinear element which responds to both light and a microwave ∼ submillimeter wave (far infrared radiation). An optical signal modulated by a modulating wave in which a subcarrier consisting of the microwave ∼ submillimeter wave is modulated by a signal wave, and a local oscillated signal consisting of a microwave ∼ submillimeter wave the same in frequency as the subcarrier are added to the nonlinear element, to fetch the signal wave by a heterodyne system.
Inventors
- 👤 Koji Mizuno
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:58
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/60
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
81 words
An optical demodulator comprising a nonlinear element which responds to both light and a microwave ∼ submillimeter wave (far infrared radiation), wherein an optical signal modulated by a modulating wave in which a subcarrier consisting of a microwave ∼ submillimeter wave is modulated by a signal wave, and a local oscillated signal consisting of the microwave ∼ submillimeter wave the same in frequency as said subcarrier are added to the nonlinear element, to fetch said signal wave by a heterodyne system.
Claim 2
Dependent Claim
30 words
An optical demodulator according to claim 1, wherein said nonlinear element is a semiconductor diode, and said local oscillated signal is applied to said nonlinear element through a waveguide circuit.
Claim 3
Dependent Claim
30 words
An optical demodulator according to claim 1, wherein said nonlinear element is a semiconductor diode, and said local oscillated signal is applied to said nonlinear element through a microstrip line.
Claim 4
Dependent Claim
29 words
An optical demodulator according to claim 1, wherein said nonlinear element is an FET, and said local oscillated signal is applied to said nonlinear element through a microstrip line.
Claim 5
Dependent Claim
29 words
An optical demodulator according to claim 1, wherein said nonlinear element is an HEMT, and said local oscillated signal is applied to said nonlinear element through a microstrip line.
References Cited (Backward Citations)
No citation records indexed.
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