光纖通訊用1.55 μm附近量子井單頻雷射二極體的研究

Study on 1.55 μm single-frequency quantum-well laser diodes for fiber optic communications

董先育(Hsien-Yu Tung)

指導教授 ： 余合興

國立臺北科技大學/電資學院/電機工程系研究所/碩士(2010年)

摘要

本研究主要是研究量子井單頻可調式雷射二極體，對具有布拉格光柵的布拉格反射器雷射(DBR LD)、垂直諧振腔面射型雷射(VCSEL)和分布反饋式雷射(DFB LD)進行分析及量測。此外也對取樣式光柵DBR雷射，進行深入的模擬、計算、分析及設計。對垂直諧振腔面射型雷射和分布反饋式雷射，則進行各種光電特性量測，以分析其光與電的特性。
在取樣式光柵DBR雷射的設計與模擬方面，採用InGaAlAs/InP的多重量子井結構，遵守ITU規範，設計出的取樣式光柵DBR雷射，具有七階段的不連續調諧波段，其相鄰通道切換時間極短只有1.29 ns；經由主動區左右兩邊光柵的調諧，目前，可以達到89個近似連續調諧的通道，通道寬度為0.4 nm，訊號在通道內傳輸的旁模抑制比高於40dB。
由相對雜訊強度的模擬得知，在增益區電流(IF = 200 mA)的電流驅動下，相對強度雜訊RIN =－172 (dB/Hz)，在此高速傳輸的情況下，其位元錯誤率(BER)低於1.0E-12，信號雜訊比可達50 dB以上。本研究設計出的DBR雷射，可廣泛應用於DWDM光纖通訊的高品質傳輸系統上面。

關鍵字

量子井雷射 ； InGaAlAs/InP ； 布拉格反射器雷射 ； 垂直諧振腔面射型雷射 ； 分布反饋式雷射 ； 取樣式光柵 ； 近似連續調諧

並列摘要

Single-frequency quantum-well tunable laser diodes, specifically for fiber optic communications, have been studied in this wok. The research has investigated mainly to the distributed-feedback (DFB), vertical-cavity surface emitting (VCSEL) and distributed-Bragg reflector (DBR) lasers for years. DFB lasers and VCSELs were measured and then analyzed to their microscopic electrical and optical operating properties for fiber system applications.
Moreover, DBR lasers with sampled gratings, i.e. SGDBR LDs, were realized according to ITU regulations by using the InGaAlAs/InP microstructure designed by our group. These lasers could be tuned either discontinuously or quasi-continuously. The quasi-continuous tuning of the device could provide up to 89 channels with a channel spacing of 0.4 nm and with a side-mode suppression ratio over 40 dB.
The above high-performance SGDBR lasers exhibited a bit-error-rate of 1.0E-12 , a relative intensity noise of -172 (dB/Hz) and a signal-noise ratio over 50 dB under a current drive of 200 mA. The above properties reflect that the SGDBR laser design can achieve to the goal of dense-wavelength division multiplexing systems in optical fiber communications.

並列關鍵字

Quantum-well lasers ； DBR laser diodes ； VCSEL diodes ； DFB laser diodes ； Sampled gratings ； InGaAlAs/InP ； Quasi-continuous wavelength tuning

參考文獻

Chapter 1

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