A new fault-identification method using a dichroic reflective optical filter in optical subscriber loops

摘要: A new method is studied which can automatically identify faults between an optical line and the transmission equip- ment on subscriber side. This employs a 13/1.55- pm-WDM dichroic reflective filter 1.55-pm-band OTDR. The inserted equipment. level distance of reflection from are measured with OTDR central office in this fault identification method. required characteristics structural design for discussed. prototype fabricated achieves target reliability. System eval- uation experiments carried out possibility 100% confirmed as result accuracy tests field.