Remote antenna unit and wavelength division multiplexing radio-over-fiber network
First Claim
1. A remote antenna unit comprising:
- an optical circulator having plurality of ports;
an electric field absorption modulator having a first input/output end and a second reflective end, the electric field absorption modulator configured to demodulate an optical signal into a first data signal and modulate the demodulated optical signal according to a second electric data signal; and
a filter disposed between the optical circulator and the electric field absorption modulator, the filter configured to transmit an optical signal having a particular wavelength from among optical signals input from a port of the optical circulator toward the electric field absorption modulator and reflecting the remaining optical signals into the port of the optical circulator, and input the optical signal from the electric field absorption modulator into the port of the optical circulator.
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Accused Products
Abstract
Disclosed is a remote antenna unit and a wavelength division multiplexing network. The remote antenna unit includes: an optical circulator having a plurality of ports; an electric field absorption modulator having a first input/output end and a second reflective end, the electric field absorption modulator configured to demodulate an optical signal into a first data signal, and modulate the demodulated optical signal according to a second electric data signal; and a filter disposed between the optical circulator and the electric field absorption modulator, for the filter configured to transmit an optical signal having a particular wavelength from among optical signals input from a port of the optical circulator toward the electric field absorption modulator and reflecting the remaining optical signals into the port of the optical circulator, and inputting the optical signal from the electric field absorption modulator into the port of the optical circulator.
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Citations
12 Claims
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1. A remote antenna unit comprising:
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an optical circulator having plurality of ports; an electric field absorption modulator having a first input/output end and a second reflective end, the electric field absorption modulator configured to demodulate an optical signal into a first data signal and modulate the demodulated optical signal according to a second electric data signal; and a filter disposed between the optical circulator and the electric field absorption modulator, the filter configured to transmit an optical signal having a particular wavelength from among optical signals input from a port of the optical circulator toward the electric field absorption modulator and reflecting the remaining optical signals into the port of the optical circulator, and input the optical signal from the electric field absorption modulator into the port of the optical circulator. - View Dependent Claims (2, 3, 4)
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5. A radio-over-fiber network comprising:
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a base station including an optical transmission portion for transmitting downstream optical signals having different wavelengths, and an optical reception portion for receiving upstream optical signals having different wavelengths; and a plurality of remote antenna units connected sequentially to the base station through optical fibers so as to be in a loop structure, each of remote antenna unit including; an optical circulator having a plurality of ports; an electric field absorption modulator having a first input/output end and a second reflective end, the electric field absorption modulator configured to demodulate an optical signal into a first data signal and modulate the demodulated optical signal according to a second electric data signal; and a filter disposed between the optical circulator and the electric field absorption modulator, the filter configured to transmit an optical signal having a particular wavelength from among optical signals input from a port of the optical circulator toward the electric field absorption modulator and reflecting the remaining optical signals into the port of the optical circulator, and input the optical signal from the electric field absorption modulator into the port of the optical circulator. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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Specification