论文部分内容阅读
基于增益开关激光器和高非线性光纤(HNLF),对产生超连续(SC)谱的方案进行了实验研究。验证了采用不同输入功率以及不同非线性系数的光纤对SC光源输出频谱的影响。针对频谱编码光码多分址(OCDMA)系统应用,提出了衡量SC光源性能的平坦度指标定义,即为C波段内除种子尖峰外的最大功率与最小功率的差值。针对采用HNLF不易产生SC光源,提出采用具有幅度均衡功能的波长选择开关(WSS)对SC光源的平坦度指标进行优化,平坦度从9dB降至3dB。将上述SC光源应用于动态可重构频谱编码OCDMA系统中,实现了40km的传输实验,误码率(BER)优于10-9。
A scheme of generating supercontinuum (SC) spectra was experimentally investigated based on gain switched laser and high nonlinear fiber (HNLF). The effect of using different input power and different nonlinear coefficients on the output spectrum of SC light source is verified. Aiming at the application of OCDMA system, the definition of flatness index to measure the performance of SC light source is proposed, which is the difference between the maximum power and the minimum power except the seed spike in the C band. In view of the fact that the HNLF is not easy to produce SC light source, the flatness index of SC light source is optimized by the wavelength selective switch with amplitude equalization (WSS), the flatness is reduced from 9dB to 3dB. The above-mentioned SC light source is applied to the dynamic reconfigurable spectrum coding OCDMA system to achieve a 40km transmission experiment with a bit error rate (BER) of better than 10-9.