Design and Fabrication of High Performance Optical Transceiver Apply to a 40Gb/s Bidirectional CWDM-PON System

• Main Authors: Zhan-Yi Lin, 林展逸
• Other Authors: Tien-Tsorng Shih
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/22108302252202989180

碩士 === 國立高雄應用科技大學 === 電子工程系 === 97 === In this thesis, we designed and fabricated a high performance optical transceiver by adopting electro-absorption modulated laser (EML) and avalanche photodiode (APD). The data rate of the transceiver was up to 10Gb/s, which could apply to the optical access network (OAN) for the fiber to the home (FTTH) services. For the part of optical receiver, we successfully fabricated a receiver with the function of clock and data recovery (CDR), which the sensitivity reached to -25.76dBm and increase of about 8dB than the p-i-n photodiode (PIN-PD). The transmitter couldn’t work normally, that was due to the poor EML characteristic and the improper voltage from the EML driving circuit. Therefore, we accomplished only design and fabrication without testing transmission performance in this thesis. The receiver was applied to the transmission experiment for a 40Gb/s bidirectional coarse wavelength division multiplexing passive optical network (CWDM-PON) system. This system was an aggregated bit rate of 40Gb/s by combining four different-wavelength channels of 10Gb/s on a single mode fiber (SMF). After 20km SMF transmission, the sensitivities of upstream and downstream signal were distributed at -17.68 to -18.73 dBm and -22.01 to -22.64dBm, respectively. We calculated the power budget by the output power and the sensitivity, which were over 7.76dB for every upstream channel and 10dB for every downstream channel. By the calculation data of power budgets, 7.76dB could support four splitting optical networks. Therefore, the total splitting ratio could reach 1:16 on this CWDM-PON system.