Opto-electronic integrated circuit, array antenna transmitter, array antenna receiver, and transmitter
First Claim
Patent Images
1. An opto-electronic integrated circuit comprising:
- an optical splitter formed on a substrate, the optical splitter branching an input optical beat signal, which is in a terahertz wave region and is obtained by multiplexing two optical signals of different wavelengths, into N (N is an integer of not less than
2) optical beat signals, and outputting the optical beat signals; and
N optical phase modulators formed on the substrate for the respective optical beat signals output from the optical splitter, the optical phase modulators having a phase modulation characteristic which causes a phase change amount to be changed depending on a wavelength of light, and phases of the optical beat signals which are in the terahertz wave region are adjusted and output from the optical splitter based on the characteristic.
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Abstract
An opto-electronic integrated circuit includes an optical splitter (12, 13A, 13B) formed on a substrate, the optical splitter branching an input optical signal into N (N is an integer of 2 or more) optical signals, and outputting the optical signals, and N optical phase modulators (15A-15D) formed on the substrate for the respective optical signals output from the optical splitter, the optical phase modulators adjusting the phases of the optical signals based on a phase modulation characteristic in which the phase change amount changes depending on the wavelength of light, and output the optical signals.
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Citations
9 Claims
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1. An opto-electronic integrated circuit comprising:
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an optical splitter formed on a substrate, the optical splitter branching an input optical beat signal, which is in a terahertz wave region and is obtained by multiplexing two optical signals of different wavelengths, into N (N is an integer of not less than
2) optical beat signals, and outputting the optical beat signals; andN optical phase modulators formed on the substrate for the respective optical beat signals output from the optical splitter, the optical phase modulators having a phase modulation characteristic which causes a phase change amount to be changed depending on a wavelength of light, and phases of the optical beat signals which are in the terahertz wave region are adjusted and output from the optical splitter based on the characteristic. - View Dependent Claims (2, 3)
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4. An opto-electronic integrated circuit comprising:
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an optical splitter formed on a substrate, the optical splitter branching an input optical beat signal, which is in a terahertz wave region and is obtained by multiplexing two optical signals of different wavelengths, into N (N is an integer of not less than
2) optical beat signals, and outputting the optical beat signals;N optical phase modulators formed on the substrate for the respective optical beat signals output from the optical splitter, the optical phase modulators having a phase modulation characteristic which causes a phase change amount to be changed depending on a wavelength of light, and phases of the optical beat signals which are in the terahertz wave region are adjusted and output from the optical splitter based on the characteristic; N OE conversion devices formed on the substrate for the respective optical phase modulators, the OE conversion devices outputting electrical signals obtained by OE-converting the optical signals that have been output from the optical phase modulators and have individual phases; N antenna devices formed on the substrate for the respective OE conversion devices, the antenna devices operating as a phased array antenna as a whole; and N electrical input/output circuits formed on the substrate for the respective OE conversion devices, the electrical input/output circuits outputting demodulation signals obtained by demodulating, by the electrical signals that have been output from the OE conversion devices and have individual phases, received signals radio-received by the antenna devices.
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5. An opto-electronic integrated circuit comprising:
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an optical splitter formed on a substrate, the optical splitter branching an input optical beat signal, which is in a terahertz wave region and is obtained by multiplexing two optical signals of different wavelengths, into N (N is an integer of not less than
2) optical beat signals, and outputting the optical beat signals;N optical phase modulators formed on the substrate for the respective optical beat signals output from the optical splitter, the optical phase modulators having a phase modulation characteristic which causes a phase change amount to be changed depending on a wavelength of light, and phases of the optical beat signals which are in the terahertz wave region are adjusted and output from the optical splitter based on the characteristic; N OE conversion devices formed on the substrate for the respective optical phase modulators, the OE conversion devices outputting electrical signals obtained by OE-converting the optical signals that have been output from the optical phase modulators and have individual phases; N electrical input/output circuits formed on the substrate for the respective OE conversion devices, the electrical input/output circuits outputting transmission signals obtained by modulating, by input modulation signals, the electrical signals that have been output from the OE conversion devices and have individual phases; and power combining lines formed on the substrate, the power combining lines power-combining and outputting the N transmission signals output from the electrical input/output circuits.
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6. An array antenna transmitter comprising:
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an optical splitter formed on a substrate, the optical splitter branching an input optical beat signal, which is in a terahertz wave region and is obtained by multiplexing two optical signals of different wavelengths, into N (N is an integer of not less than
2) optical beat signals, and outputting the optical beat signals; andN optical phase modulators formed on the substrate for the respective optical beat signals output from the optical splitter, the optical phase modulators having a phase modulation characteristic which causes a phase change amount to be changed depending on a wavelength of light, and phases of the optical beat signals which are in the terahertz wave region are adjusted and output from the optical splitter based on the characteristic; N photodiodes formed on the substrate for the respective optical phase modulators, the photodiodes outputting electrical signals obtained by OE-converting the optical beat signals that have been output from the optical phase modulators and have individual phases; and N antenna devices formed on the substrate for the respective photodiodes, the antenna devices operating as a phased array antenna as a whole by radio-transmitting the electrical signals that have been output from the photodiodes and have individual phases.
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7. An array antenna receiver comprising:
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an optical splitter formed on a substrate, the optical splitter branching an input optical beat signal, which is in a terahertz wave region and is obtained by multiplexing two optical signals of different wavelengths, into N (N is an integer of not less than
2) optical beat signals, and outputting the optical beat signals; andN optical phase modulators formed on the substrate for the respective optical beat signals output from the optical splitter, the optical phase modulators having a phase modulation characteristic which causes a phase change amount to be changed depending on a wavelength of light, and phases of the optical beat signals which are in the terahertz wave region are adjusted and output from the optical splitter based on the characteristic; N photodiodes formed on the substrate for the respective optical phase modulators, the photodiodes outputting electrical signals obtained by OE-converting the optical signals that have been output from the optical phase modulators and have individual phases; N antenna devices formed on the substrate for the respective photodiodes, the antenna devices operating as a phased array antenna as a whole; and N electrical input/output circuits formed on the substrate for the respective photodiodes, the electrical input/output circuits outputting demodulation signals obtained by demodulating, by the electrical signals that have been output from the photodiodes and have individual phases, received signals radio-received by the antenna devices.
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8. A transmitter comprising:
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an optical splitter formed on a substrate, the optical splitter branching an input optical beat signal, which is in a terahertz wave region and is obtained by multiplexing two optical signals of different wavelengths, into N (N is an integer of not less than
2) optical beat signals, and outputting the optical beat signals; andN optical phase modulators formed on the substrate for the respective optical beat signals output from the optical splitter, the optical phase modulators having a phase modulation characteristic which causes a phase change amount to be changed depending on a wavelength of light, and phases of the optical beat signals which are in the terahertz wave region are adjusted and output from the optical splitter based on the characteristic; N photodiodes formed on the substrate for the respective optical phase modulators, the photodiodes outputting electrical signals obtained by OE-converting the optical signals that have been output from the optical phase modulators and have individual phases; N electrical input/output circuits formed on the substrate for the respective photodiodes, the electrical input/output circuits outputting transmission signals obtained by modulating, by input modulation signals, the electrical signals that have been output from the photodiodes and have individual phases; and power combining lines formed on the substrate, the power combining lines power-combining and outputting the N transmission signals output from the electrical input/output circuits.
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9. An opto-electronic integrated circuit comprising:
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a multiplexer configured to multiplex input signals; an optical splitter formed on a substrate, the optical splitter branching an input optical beat signal, which is in a terahertz wave region and is obtained by multiplexing two optical signals of different wavelengths, into N, N being an integer of not less than 2, optical beat signals, and outputting the optical beat signals; and N optical phase modulators formed on the substrate for the respective optical beat signals output from the optical splitter, the optical phase modulators having a phase modulation characteristic which causes a phase change amount to be changed depending on a wavelength of light, and phases of the optical beat signals which are in the terahertz wave region are adjusted and output from the optical splitter based on the characteristic.
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Specification