Yoo Sang-Hwa, Moon Sang-Rok, Kye Myeonggyun, Lee Chang-Hee
Opt Express. 2016 Jun 27;24(13):14494-505. doi: 10.1364/OE.24.014494.
We investigate reduction of mode partition noise of a spectrally sliced Fabry-Perot laser diode (FP-LD) for application to seeded DWDM systems. The proposed scheme for the noise reduction incorporates a fiber-based Mach-Zehnder interferometer (MZI) and a reflective semiconductor optical amplifier (RSOA). The MZI enables to reduce a relative intensity noise (RIN) more than 3 dB with better noise distributions. Experimental results of 10-Gb/s signal transmission exhibit a considerable bit-error-rate (BER) reduction by three orders of magnitude at the given received power. After the noise reduction, the FP-LD is applied to a 10-Gb/s DWDM system as a seed-light-source. In a local-seeding scheme, return-to-zero (RZ) and carrier-suppressed (CS)-RZ signal formats are compared as a function of transmission distance. Furthermore, a back-reflection induced impairment is evaluated in a remote-seeding scheme. We also count the number of useable channels to show the feasibility of DWDM transmission.
我们研究了用于种子型密集波分复用（DWDM）系统的光谱切片法布里-珀罗激光二极管（FP-LD）的模式分配噪声降低问题。所提出的噪声降低方案包括一个基于光纤的马赫-曾德尔干涉仪（MZI）和一个反射半导体光放大器（RSOA）。MZI能够将相对强度噪声（RIN）降低超过3 dB，并具有更好的噪声分布。10 Gb/s信号传输的实验结果表明，在给定的接收功率下，误码率（BER）显著降低了三个数量级。噪声降低后，FP-LD被用作10 Gb/s DWDM系统的种子光源。在本地种子方案中，比较了归零（RZ）和载波抑制（CS）-RZ信号格式随传输距离的变化。此外，在远程种子方案中评估了背向反射引起的损伤。我们还计算了可用信道的数量，以展示DWDM传输的可行性。
