Experimental Investigation Of RSOA Based Wavelength Division Multiplexed Passive Optical Network With Colorless ONUs

Due to the wavelength identification of the optical network unit (ONU) in wavelengthdivision multiplexed passive optical network (WDM-PON), the devices kinds will increasewith the nodes in the access networks. And this will produce the high cost problem whichhas stopped the process of WDM PON from coming into the commercial market.This thesis discribed a new RSOA based WDM-PON system with low-cost colorlessONUs. It can avoid the installation, operation and maintenance costs increase brought by thewavelength selection devices. Otherwise, the gain brought by RSOA can increase the systempower budget and extend the transmission distance. So it is very necessary to research thisissue.The main content of the thesis includes:(1) Summarized and analyzed the key technologies of the WDM-PON systems.Compared the performance, advantages and disadvantages of a variety of colorless ONUtechnical solutions and analyzed the principle and design of the driver module of the RSOAand the solution based on a coherent light source and a remote locking RSOA. Successfullyachieved the modulation of a1.25Gb/s digital signal.(2) Summarized and analyzed the principle and performance of the reflectivesemiconductor optical amplifier. Experimental analyzed and optimized its workingconditions and tested the dynamic range of the device which is high to15dB. Tested theRSOA based multiple wavelength light source and successfully achieved the self locking.(3) Presented a colorless WDM-PON system based on RSOA. Tested and analyzedthe power buget and BER of the uplink and downlink systems and successfully achieved theerror free transmission of a1.25Gbps bit rate NRZ signal for20km distance.(4) Presented a experiment model for the rayleigh backscattering noise in the uplinktransmission system. Tested and analyed the influence factors of the carrier and signalrayleigh backscattering noise.