Colorless Optical Transmitter for Upstream WDM PON Based on Wavelength Conversion
Colorless Optical Transmitter for Upstream WDM PON Based on Wavelength Conversion
复制标题
基于波长转换的上行WDM PON无色光发射机
DOI：
10.1109/jlt.2013.2238216
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发表时间：
2013
影响因子：
4.7
通讯作者：
Hoon Kim
中科院分区：
文献类型：
--
作者：
Z. Al;M. Thollabandi;Hoon Kim
我们提出并演示了一种基于全光波长转换的新型无色光发射机，使用反射式半导体光放大器（RSOA）在波分复用无源光网络中进行上行传输。所提出的用于光网络单元的无色光发射机由电吸收调制激光器（EML）、光耦合器和RSOA组成。通过 RSOA 中的交叉增益调制，来自 EML 泵浦光的上行数据被施加到中央局 (CO) 提供的连续波探测光上。 CO 处的光延迟干涉仪可调整上行信号的线性调频脉冲，以提高系统带宽和色散容限。所提出的上行光发射机基于由载波-载波散射和载波-声子相互作用控制的 RSOA 的快速增益恢复。因此，它可以在>； 10 Gb/秒。分配两个独立的波长带，一个用于泵浦信号，另一个用于探测信号。因此，所提出的发射器以无色方式工作，因为 EML 可以具有泵浦频带内的任意波长。我们演示了在单光纤环回配置网络中由所提出的方案生成的 10.7 Gb/s 上行信号的传输。通过实验研究了所提出的发射器的无色操作条件。
We propose and demonstrate a novel colorless optical transmitter based on all-optical wavelength conversion using a reflective semiconductor optical amplifier (RSOA) for upstream transmission in wavelength-division-multiplexed passive optical networks. The proposed colorless optical transmitter for the optical network unit is composed of an electro-absorption modulated laser (EML), an optical coupler, and an RSOA. Through cross-gain modulation in the RSOA, the upstream data from the EML pump light are imposed onto a continuous-wave probe light provided from the central office (CO). An optical delay interferometer at the CO tailors the chirp of the upstream signal to improve the bandwidth of the system and dispersion tolerance. The proposed upstream optical transmitter is based on the fast gain recovery of the RSOA governed by carrier-carrier scattering and carrier-phonon interactions. Thus, it can potentially operate at >; 10 Gb/s. Two separate wavelength bands are allocated, one for the pump signals and the other for the probe signals. Therefore, the proposed transmitter operates in a colorless manner since the EML can have any arbitrary wavelength within the pump band. We demonstrate the transmission of a 10.7-Gb/s upstream signal generated by the proposed scheme in a single-fiber loopback-configured network. The conditions for colorless operation of the proposed transmitter are investigated through experiment.