研究生: |
陳家銘 Chia-Ming Chen |
---|---|
論文名稱: |
設計製作應用於光閘開關之增益箝制半導體光放大器 Design and fabrication of gain clamped semiconductor optical amplifiers for optical switching applications |
指導教授: |
李三良
San-Liang Lee |
口試委員: |
張嘉男
Chia-Nan Chang 曹恆偉 Hen-Wei Zao 何文章 Wen-Chang Ho 毛明華 Ming-Hwa Mao |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
論文出版年: | 2005 |
畢業學年度: | 93 |
語文別: | 中文 |
論文頁數: | 90 |
中文關鍵詞: | 增益箝制半導體光放大器 |
外文關鍵詞: | semiconductor optical amplifiers |
相關次數: | 點閱:210 下載:1 |
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本論文主要研究設計與製作應用於光交換開關之增益箝制半導體光放大器,使其能應用在高密度分波多工或低密度分波多工之光纖網路交換系統中。在理論部分,主要說明增益箝制式半導體光大器與傳統半導體光放大器的差異。模擬上則是針對材料增益特性、極化相關性、監控用雷射特性、半導體光放大器增益表現、極化相關增益特性、以及分佈布拉格反射鏡等做分析比較,並使用彎曲波導降低端面反射率等方面設計。在實驗結果方面,成功製作出增益為17 dB的半導體光放大器,在增益箝制半導體光放大器方面則可將增益箝制在11 dB。輸入飽和功率約可達7 dBm,並改善在高輸入功率下的增益飽和。極化相關增益差值約在3 dB。
In this thesis, we present the design and fabrication of gain-clamped semiconductor optical amplifiers (GC-SOA) for optical switching networks. Semiconductor optical amplifiers will play an important role in future WDM transmission systems. However, their low output saturation power, large noise figure, and gain saturation induced signal crosstalk have been the main obstacles for practical applications in WDM systems.
A gain-clamping mechanism can be realized by using the DFB or DBR-based structure and such a SOA is well known as gain-clamped semiconductor optical amplifier. We used tensile strain quantum wells to compensate the polarization dependent gain. Different lengths of DBR grating are formed on both side of the active region in order to compensate the nonuniformity carrier distribution in the longitudinal direction. To suppress the cavity resonant, S-bend waveguides are integrated on the input/output regions.
The measured results show that the gain peak of GC-SOA locates at 1540 nm; and the lasing oscillation is at 1502nm. Chip gain for 1500μm- and 1000μm-long SOA is 17 dB and 10 dB, respectively. For 1500μm-long GC-SOA, the chip gain is clamped at 11 dB with an input saturation power of 7 dBm. The polarization-dependent gain fluctuation is about 3 dB.
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