Optical fiber characteristic measuring device

专利名称：Optical fiber characteristic measuring device发明人：Zhixien Li,Yasushi Sato,Shoji Adachi,Toshio

Kurashima,Kaoru Shimizu

申请号：US08/721575申请日：19960925公开号：US05686986A公开日：19971111

摘要：Coherent light emitted from a coherent light source 1 is sent as a probe beamthrough a connector 31 into an optical fiber being measured. A portion of this beam issent to an optical frequency converter 100 to form an optical pulse train having afrequency which is frequency-swept in steps of a designated frequency at a designatedperiodicity, and an optical pulse having a designated frequency is extracted from theoptical pulse train by an electro-optic switch 18 and sent to the optical fiber beingmeasured. Then, a signal beam exiting the optical fiber being measured is heterodyne-received by means of a local beam passing through either a connecting optical fiber 6side or a frequency shifter 7 side according to the selection of optical switches 4 and 5.Consequently, it is possible to measure the characteristics of the optical fiber by meansof a BOTDR, BOTDA or a COTDR.

申请人：ANDO ELECTRIC CO., LTD.,NIPPON TELEGRAPH AND TELEPHONECORPORATION

代理机构：Finnegan, Henderson, Farabow, Garrett & Dunner, LP.

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