Investigation and Characteristics Study of Optical Add Drop Multiplexers (OADMs) Based on

• Main Authors: Chan chun yi, 詹君儀
• Other Authors: 廖顯奎
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/75691654171254651446

碩士 === 國立臺灣科技大學 === 電子工程系 === 91 === In this thesis, we design and investigate optical add drop multiplexers (OADMs) based on fiber Bragg gratings and related optical components. For the OADM design, we propose several kinds of reconfigurable OADMs. They are based on strain-tunable and/or switching mechanism. Optical loss compensation and gain equalization issues are also disused. For OADMs investigation, we fabricate two-channel reconfigurable switching OADM, two- channel reconfigurable strain-tunable OADM and four-channel fixed type OADM. The pass-through (insertion) loss of them are 3.5dB, 2dB and 4dB respectively. We study the power penalty of OADM included wavelength misalignment and intraband crosstalk. The power penalties of wavelength misalignment are 0.2dB, 1.7dB and 3dB for 0.02nm, 0.03nm and 0.05nm. The power penalty of intraband crosstalk is only 0.1dB, because we use the extra-high reflectivity (99.9%) of home-made FBG. We also measure the bit error rate (BER) performance of OADM(s) in a lightwave system. Power penalty of OADM in a 25 km single-mode fiber is 0.5dB, compared to back to back measurement. Finally, we conclude the achievements in this thesis and suggest future work.