Studies on Weak-Resonant-Cavity-Fabry-Perot-Laser-Diode-based Wavelength Division Multiplexer Passive Optical Network

• Main Authors: Liao, Yu-Sheng, 廖育聖
• Other Authors: Lin, Gong-Ru
• Format: Others
• Language: en_US
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/05140324495967177968

博士 === 國立交通大學 === 光電工程學系 === 99 === In this dissertation, we investigated the injection-locking wavelength-division-multiplexer passive optical network (WDM-PON) system. First, we introduced the side-mode injection-locked Fabry-Perot Laser Diode (FPLD) transmission diagnosis of a multi-channel selectable weak-resonant-cavity Fabry-Perot Laser Diode (WRC-FPLD). Moreover, the injection-locking performance of a 1% WRC-FPLD and demonstrate the 2.5-Gbit/s & 25-km WDM-PON application with the directly modulated WRC-FPLD based transmitter with enhanced injection-locking bandwidth of 0.48 nm was we discussed and simulated. A 25-channel locking capacity is reported for such a side-mode injection-locked WRC-FPLD with corresponding wavelength locking range of 30 nm, the minimal requested power of -7dBm and gain extinction ratio of <7 dB was demonstrated. Furthermore, we investigate quasi-color-free the WDM-PON transmitters with comparable broadband gain spectrum by using an optically gain-switching coherent pulse-train and threshold reduction of WRC-FPLDs. Nevertheless, such a degradation only induces a power penalty of < 1dB at BER<10-10 over changing temperature of 9 degree. A receiving sensitivity back-to-back transmission can be -25.6 dBm, and 25-km transmission power penalties is up to 2 dB with 16 channels. At last, we demonstrated a novel in situ self-restoration scheme to track real time the injection locking of a FPLD by monitoring a built-in integrated photodiode. Such a scheme can be effectively implemented with a minimum amount of redundant network resources to achieve self-restoration within 50 seconds with Q factor >8.2 and side-mode suppression ratio (SMSR) >35 dB at 2.5 Gbit/s. These investigations would be useful in the next generation injection-locking based WDM-PON systems.