Fault Location for Wdm-pon Using a Multiple-longitudinal- Mode Laser Modulated by Chaotic Wave
نویسندگان
چکیده
We experimentally demonstrate a cost-effective method to locate faults in wavelength-division-multiplexing passive optical network (WDM-PON) utilizing a multiple-longitudinal-mode Fabry–Perot semiconductor laser directly modulated by chaotic wave from a Colpitts oscillator. Due to chaos modulation, every longitudinal mode of the laser has chaotic intensity waveform. Using a tunable optical filter selects a mode to detect the wavelength-matched branch of WDM-PON using chaos correlation technique. Experimental results show that the unterminated fiber end, mismatch connector and fiber breakpoint can be preciously located. A detection range of approximately 75 km and a range-independent spatial resolution of 14 cm are achieved. VC 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2502–2506, 2015; View this article online at wileyonlinelibrary.com. DOI 10.1002/ mop.29375
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