Fading noise reduction in coherent OTDR
- 1 February 1992
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 4 (2) , 201-203
- https://doi.org/10.1109/68.122361
Abstract
The authors describe a reduction in fading noise which causes amplitude fluctuation on a backscattered trace in coherent OTDR (optical time-domain reflectometry). In order to reduce the fading noise, the optical frequency of the DFB-LD (distributed feedback laser diode) is changed by changing the LD temperature during the integrations of the backscattered signals. At the same time, the state of polarization of the launched signal pulses is changed. The amplitude fluctuation has been reduced to as low as 0.06 dB. Measurements were performed on a 10 km length of conventional single-mode fiber.Keywords
This publication has 7 references indexed in Scilit:
- High performance single mode OTDR using coherent detection and fibre amplifiersElectronics Letters, 1990
- Advances in optical time domain reflectometryJournal of Lightwave Technology, 1989
- Development of a coherent OTDR instrumentJournal of Lightwave Technology, 1987
- Measurement of Rayleigh backscatter-induced linewidth reductionElectronics Letters, 1985
- Fading in heterodyne OTDRElectronics Letters, 1984
- OTDR in single-mode fibre at 1.5 μm using heterodyne detectionElectronics Letters, 1982
- Novel method for high resolution measurement of laser output spectrumElectronics Letters, 1980