EA-Modulator-Based Optical Time Division Multiplexing/Demultiplexing Techniques for 160-Gb/s Optical Signal Transmission
EA-Modulator-Based Optical Time Division Multiplexing/Demultiplexing Techniques for 160-Gb/s Optical Signal Transmission
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DOI：
10.1109/jstqe.2006.889429
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发表时间：
2007-02
影响因子：
4.9
通讯作者：
H. Murai;M. Kagawa;H. Tsuji;K. Fujii
中科院分区：
文献类型：
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作者：
H. Murai;M. Kagawa;H. Tsuji;K. Fujii
本文描述了采用基于电吸收 (EA) 调制器的光复用器的 160 Gb/s 光时分复用 (OTDM) 技术。该光复用器将四个 EA 调制器与自由空间光学器件集成在一起，能够稳定地生成真实的 160 Gb/s OTDM 信号。光复用器具有调制格式的切换能力，这种能力源于EA波导中的热光效应，因此可以通过调节EA调制器的工作温度来生成各种相位编码的OTDM信号，例如载波抑制归零(CS-RZ)信号。通过采用新型 160 Gb/s 光复用器，开发了 160 Gb/s OTDM 发送器和接收器原型。发射机侧的光短脉冲源、光时分解复用器以及接收机侧的时钟恢复锁相环(PLL)电路也采用了EA调制器。 160 Gb/s 系统原型展示了保持高稳定性的卓越性能，并讨论了其实际应用的适用性，展示了在日本千兆位网络 II (JGN II) 光学测试台上 160 Gb/s 635 km 现场试验的实验结果
In this paper, 160-Gb/s optical-time-division-multiplexing (OTDM) techniques employing electroabsorption (EA)-modulator-based optical multiplexer are described. The optical multiplexer integrates four EA modulators with free-space optics and enables, stably, to generate an authentic 160-Gb/s OTDM signal. The optical multiplexer possesses a switching capability of modulation format, which originates in the thermo-optic effect in EA waveguide, so that it is possible to generate various phase-coded OTDM signals such as carrier-suppressed return-to-zero (CS-RZ) signal by tuning operation temperatures of the EA modulators. By employing the novel 160-Gb/s optical multiplexer, prototypes of 160-Gb/s OTDM transmitter and receiver were developed. EA modulators are also adopted to optical short pulse source at transmitter side, optical time division demultiplexer, and phase-locked loop (PLL) circuit for clock recovery at the receiver side. The 160-Gb/s system prototype exhibited a superior performance maintaining high stability, and its applicability to practical use is discussed, showing experimental results of 160-Gb/s 635 km field trial on Japan Gigabit Network II (JGN II) optical testbed