Optical receiver and optical transmission system
First Claim
1. An optical receiver comprising:
- an optical band-limiting filter which imposes a band-limitation on an input optical signal;
an opto-electric converter which converts the optical signal output from the optical band-limiting filter into an electric signal; and
an electric equalizer which performs an equalization processing on a signal waveform of the electric signal output from the opto-electric converter, wherein a full width at half maximum of the optical band-limiting filter is equivalent to or smaller than a bit rate frequency of the optical signal.
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Abstract
The present invention includes an optical band-limiting filter which imposes a band-limitation on an input optical signal, an opto-electric converter which converts the optical signal output from the optical band-limiting filter into an electric signal, a lowpass filter which imposes the band-limitation on the electric signal output from the opto-electric converter, an amplifier which amplifies the output signal of the lowpass filter, and an electric equalizer which performs an equalization processing on a waveform of the electric signal output from the opto-electric converter are provided, and a full width at half maximum of the optical band-limiting filter is set to be equivalent to or smaller than a bit rate frequency of the optical signal.
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Citations
20 Claims
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1. An optical receiver comprising:
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an optical band-limiting filter which imposes a band-limitation on an input optical signal;
an opto-electric converter which converts the optical signal output from the optical band-limiting filter into an electric signal; and
an electric equalizer which performs an equalization processing on a signal waveform of the electric signal output from the opto-electric converter, wherein a full width at half maximum of the optical band-limiting filter is equivalent to or smaller than a bit rate frequency of the optical signal. - View Dependent Claims (2, 3, 4, 5)
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6. An optical receiver comprising:
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an opto-electric converter which converts an input optical signal into an electric signal;
a lowpass filter which imposes a band-limitation on the electric signal output from the opto-electric converter; and
an electric equalizer which performs an equalization processing on a signal waveform of the electric signal output from the lowpass filter, wherein a cutoff frequency of the lowpass filter is equal to or lower than a half of a bit rate frequency of the optical signal. - View Dependent Claims (7, 8, 9, 10, 11)
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12. An optical transmission system comprising an optical transmitter and an optical receiver, wherein
each of the optical transmitters includes an optical band-limiting filter which imposes a band-limitation on an optical signal, and each of the optical receiver includes an opto-electric converter which converts the optical signal transmitted from the optical transmitter into an electric signal; - and
an electric equalizer which performs an equalization processing on a waveform of the electric signal output from the opto-electric converter, and wherein a full width at half maximum of the optical band-limiting filter is equivalent to or smaller than a bit rate frequency of the optical signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification