新穎的光電模組於微波光電與光分碼多工之應用

Novel Photonic Module for Microwave Photonics and OCDMA System

林奕在(Yi-Tzai Lin)

指導教授 ： 曾世杰

國立臺北科技大學/電資學院/光電工程系研究所/碩士(2010年)

摘要

在本篇論文中，我們提出了兩個不同的光學系統設計應用於網路通訊，一個是多波長脈衝雷射，一個是濾波器。多波長脈衝雷射可以打出脈衝，應用在分時多工的系統上，加上多波長的特點，同一脈衝下能藉由濾波器將不同波長分開來，將脈衝應用到多個用戶端。陷波濾波器能將訊號的雜訊排除，應用在接收訊號的部份，像是雷達系統在接收訊號之後，就能利用陷波濾波器將雜訊降低，類比轉數位就能不需要太高的解析度。
第一個架構展示了一個簡單的可調式多波長脈衝雷射系統，這個系統運用gain switching運用在反射式半導體光放大器(RSOA)上，藉由interleaver(100/200GHz)將寬頻光源切割，產生多波長的雷射光源，並且利用可調式濾波器濾出四根波長雷射，藉由環狀結構自我注入。
第二個架構展示了一個陷波濾波器系統，此系統運用可調式雷射打出雷射，藉由網路分析儀外調ＭＺＭ，產生側模，經由光循環器、極化控制器將-1側模注入VCSEL雷射，注入後使得-1側模較+1側模時間延遲，由調整極化控制器得到２π的相位差，藉此得到濾除頻率的效果。

關鍵字

可調式陷波濾波器 ； 面射型雷射 ； 脈衝 ； 半導體光放大器

並列摘要

This investigation experimentally demonstrates a simple tunable multi-wavelength fiber ring laser pulse source. Such a fiber laser employs a gain witched reflective semiconductor optical amplifier in a self-seeding scheme. The wavelength tuning is achieved by only use a tunable optical filter. Multi-wavelength optical pulses are experimentally presented with SNR over 40 dB at a repetition frequency of 989.89 MHz. Furthermore, the SNR of the single-wavelength pulses has a nearly constant distribution is higher than 49 dB within the wavelength tuning range of 17 nm.
　　A tunable photonic microwave filter using slow light in a VCSEL is proposed and experimentally demonstrated. A probe signal is generated by a tunable laser and then modulated via an Mach-Zehnder modulator (MZM). The Mach-Zehnder modulator is modulated by a network analyzer. An optical circulator is used to couple the probe signal into the VCSEL. The polarization of the probe signal is adjusted by a polarization controller. The phase change of 2π is observed. Finally, the amplitude and phase changes are measured by the network analyzer.

並列關鍵字

Tunable Notch Filter ； VCSEL ； reflective semiconductor optical amplifier

參考文獻

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