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Translation - English 1. A dispersion measurement device for a fiber link, comprising
a spectrum processing unit;
a photoelectric conversion unit;
a frequency mixing unit; and
a signal processing unit;
wherein
said spectrum processing unit, said photoelectric conversion unit, said frequency mixing unit, and said signal processing unit are sequentially connected along a light path;
said spectrum processing unit operates to spectrally process a light signal from a fiber link into two optical signals, and to transmit said optical signals to said photoelectric conversion unit;
said photoelectric conversion unit operates to detect said optical signals from said spectrum processing unit, to converse said optical signals into two electric signals, and to transmit said electric signals to said frequency mixing unit;
said frequency mixing unit operates to mix said electric signals from said photoelectric conversion unit, and to transmit said mixed electric signal to said signal processing unit; and
said signal processing unit operates to receive said mixed electric signal from said frequency mixing unit, to perform analog-digital conversion on said mixed electric signal, and to calculate a dispersion value for said fiber link according to said mixed electric signal after analog-digital conversion.
2. The dispersion measurement device for a fiber link of claim 1, wherein
said spectrum processing unit comprises a filter, an optical branch unit, and a sideband spectrum splitter;
said filter, said optical branch unit, and said sideband spectrum splitter are sequentially connected along said light path;
said filter operates to filter optical signals in all channels of said fiber link;
said optical branch unit operates to branch said light path processed via said filter;
said sideband spectrum splitter operates to receive said optical signal from said optical branch unit, to extract upper-sideband spectrum and lower-sideband spectrum therefrom, to output an upper-sideband optical signal and a lower-sideband optical signal with certain spectral width, and to output said upper-sideband optical signal and said lower-sideband optical signal to said photoelectric conversion unit.
3. The dispersion measurement device for a fiber link of claim 2, wherein
said filter is a tunable optical bandpass filter;
said optical branch unit is an optical brancher; and
said sideband spectrum splitter is an optical bandpass filter.
4. The dispersion measurement device for a fiber link of claim 3, wherein said tunable optical bandpass filter is an arrayed waveguide grating, a Mach Rehnder interferometer, or a microring resonator.
5. The dispersion measurement device for a fiber link of claim 3, wherein said optical brancher is a 1×2 light path splitter.
6. The dispersion measurement device for a fiber link of claim 3, wherein said optical bandpass filter is an arrayed waveguide grating, a Mach Rehnder interferometer, or a microring resonator.
7. The dispersion measurement device for a fiber link of claim 1, wherein
said photoelectric conversion unit comprises a first photoelectric detector, and a second photoelectric detector;
said first photoelectric detector operates to detect said upper-sideband optical signal from said spectrum processing unit, to convert said upper-sideband optical signal into an electric signal, and to transmit said electric signal to said frequency mixing unit; and
said second photoelectric detector operates to detect said lower-sideband optical signal from said spectrum processing unit, to convert said lower-sideband optical signal into an electric signal, and to transmit said electric signal to said frequency mixing unit.
8. The dispersion measurement device for a fiber link of claim 1, wherein
said frequency mixing unit comprises a first electric signal brancher, a second electric signal brancher, a radio frequency local oscillator source, a phase shifter, a first frequency mixer, a second frequency mixer, a third frequency mixer, and a fourth frequency mixer;
said first electric signal brancher operates to branch an electric signal from said photoelectric conversion unit into two electric signals, and to transmit said electric signals to radio frequency input ends of said first frequency mixer and said second frequency mixer;
said second electric signal brancher operates to branch the other electric signal from said photoelectric conversion unit into electric signals, and to transmit said electric signals to radio frequency input ends of said third frequency mixer and said fourth frequency mixer;
said radio frequency local oscillator source operate to generate multiple radio frequency signals with certain frequencies, to transmit two radio frequency signals with the same phase to local oscillator inputs of said first frequency mixer and said fourth frequency mixer, and to transmit another radio frequency signal to said phase shifter;
said phase shifter operates to receive said radio frequency signal from said radio frequency local oscillator source, to generate a phase shift, to split said radio frequency signal into two output signals, and to respectively transmit said output signals to local oscillator inputs of said second frequency mixer, and said third frequency mixer;
said first frequency mixer operates to mix said electric signals from said first electric signal brancher and said radio frequency local oscillator source, to amplify an intermediate-frequency signal of said mixed electric signal, and to transmit said intermediate-frequency signal to said signal processing unit;
said second frequency mixer operates to mix said electric signals from said first electric signal brancher and said phase shifter, to amplify an intermediate-frequency signal of said mixed electric signal, and to transmit said intermediate-frequency signal to said signal processing unit;
said third frequency mixer operates to mix said electric signals from said second electric signal brancher and said phase shifter, to amplify an intermediate-frequency signal of said mixed electric signal, and to transmit said intermediate-frequency signal to said signal processing unit; and
said fourth frequency mixer operates to mix said electric signals from said second electric signal brancher and said radio frequency local oscillator source, to amplify an intermediate-frequency signal of said mixed electric signal, and to transmit said intermediate-frequency signal to said signal processing unit.
9. The dispersion measurement device for a fiber link of claim 1, wherein
said signal processing unit comprises an analog-digital converter, and a signal processor;
said analog-digital converter is serially connected to said signal processor;
said analog-digital converter operates to convert said signal from said frequency mixing unit into a digital signal, and to transmit said signal to said signal processor; and
said signal processor operates to receive said digital signal from said analog-digital converter, and to process said digital signal via algorithms whereby obtaining a characteristic value for said fiber link.
10. The dispersion measurement device for a fiber link of claim 9, wherein said signal processor is a micro-controller, a general processor, a digital signal processor, or a field programmable gate array.
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Translation education
Master's degree - University of Wollongong
Experience
Years of experience: 21. Registered at ProZ.com: Oct 2013.
Expertise