基于太赫兹光非对称解复用器的全光倍频技术

All Optical Frequency Multiplication Technology Based on Terahertz Optical Asymmetric De-Multiplexer

太赫兹光非对称解复用器(TOAD)是一种全光信号处理领域中常用的器件,其具有响应速度快、可集成、稳定性好等优点。本文提出了一种基于TOAD的全光时钟倍频技术方案。通过模型仿真,模拟对TOAD输入直流光,在时钟脉冲前后沿附近会产生双峰输出现象,以此来分析TOAD的开关特性,研究了控制光能量、开关窗口大小、半导体光放大器增益恢复时间等因素对双峰输出特性的影响。对光时钟信号进行了全光二倍频、三倍频和四倍频的仿真,从频谱上观察,倍频准确,并且在实验上实现了200 Mb/s和1 Gb/s时钟的全光二倍频,与仿真结果相符。

Terahertz optical asymmetric de-multiplexer （TOAD） is one of the key devices for all-optical signal processing with its fast response, good integration and stability. A scheme for all optical frequency multiplication is proposed based on the TOAD. The switch characteristics of the TOAD are discussed with simulations for bimodal output on the leading and tailing edges of the clock pulse as control, in addition with the dependence on some factors of the TOAD, such as energy of control pulse, window of TOAD, carrier recovery time. Based on the bimodal output effects, quadrupling are simulated, and the frequency doubling experiments for 200 Mb/s and 1 Gb/s clocks. the all-optical frequency doubling, tripling and of the clock is implemented with simulations and