Sensitive OTDR phase demodulation system of phase place

The utility model provides a sensitive OTDR phase demodulation system of phase place, this system include the cross -correlation circuit, and the cross -correlation circuit is connected with balanced light detector electricity, the cross -correlation circuit includes treatment circuit, first detecto...

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Bibliographische Detailangaben
Hauptverfasser:	CUI HONGLIANG, SHI XIANGDONG, CHANG TIANYING, CUI HONGKUI, LI YA, CHENG LIYAO, ZHAO ENCAI, YU MIAO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS TARIFF METERING APPARATUS TESTING
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Beschreibung
Zusammenfassung:	The utility model provides a sensitive OTDR phase demodulation system of phase place, this system include the cross -correlation circuit, and the cross -correlation circuit is connected with balanced light detector electricity, the cross -correlation circuit includes treatment circuit, first detector and a low pass filter, and the treatment circuit is connected with balanced light detector and first detector electricity respectively, and the first detector sends the mixing signal to a low pass filter, the treatment circuit includes first processing route and second processing route, and balanced light detector sends the first signal of telecommunication to first processing route, and balanced light detector handles the route to the second and sends the second signal of telecommunication, and first processing route and second processing route are connected with two input electricity of first detector respectively. The laser phase noise can be got rid of by this system, simplifies the signal demodulation circui