交叉增益型波长转换器的实验研究

Experimental study on all\|optical wavelength converter based on cross\|gain modulation

全光波长转换器是全光网络中的关键光电子器件。基于半导体光放大器的交叉增益型波长转换器具有结构简单容易实现、转换效率高、波长转换范围宽以及转换速率高的特点。文中在自行研制半导体光放大器的基础上 ,对交叉增益型波长转换器进行了实验研究。讨论了实现波长转换的基本原理 ,描述了实验系统结构 ,实现了速率为 140Mbit/s的 1315nm和 130 1nm之间的波长转换。研究了波长转换器泵浦光功率、探测光功率以及放大器注入电流转换效率、消光比和噪声特性的影响 ,研究结果与文献中报道的相同。研究表明 ,不同因素对不同指标的影响是相互制约的 ,要全面提高波长转换器的性能 ,必须折衷考虑各方面的因素。研究结果对半导体光放大器结构参数的优化和波长转换工作条件的优化有一定的指导作用。

All\|optical wavelength converter will become key device in all\|optical network based on DWDM. Exploitation cross\|gain modulation in semiconductor optical amplifiers is one of the most efficient ways to achieve wavelength conversion for its simple implementation, large wavelength conversion span, high conversion efficiency and high conversion bitrates etc. Experimental study on XGM wavelength conversion based on the SOA fabricated in our lab. was presented in this paper. All\|optical wavelength conversion at 140Mbit/s bitrates was achieved between 1315nm and 1301nm. The influences on the performance of the wavelength conversion, that were induced by the pump power, the probe power and the injection current of the SOA, were also discussed. Results showed that the conversion efficiency would be decreased as the pump power increases or the probe power decreases, but the extinction ratio would be increased at the same condition. In addition, the noise characteristic was discussed. It could be shown that there existed trade\|off among different performances, so it is necessary to take different factors into account in order.