新型的光纤耦合器环状连接法产生时分复用信号的实验研究

将单模光纤耦合器的一个输入端和一个输出端连接起来构成光纤环路,并使光纤环路的时延为输入光脉冲半周期的奇数倍,这样,在耦合器的另一个输出端口就可获得倍乘重复率的光脉冲信号。采用三级环状连接的光纤耦合器,产生了八倍频(8×2.5 Gb/s)的时分复用信号。实验结果表明,这一时分复用信号产生方案具有脉冲的幅度和间隔易于调节、输出信号的功率大、成本低且易于实验室拉制等优点。

Experimental Study of a Novel Fiber-coupler Loop-connecting Method for Generating Optical Time Division Multiplexing Signal

Connecting an input port and an output port of a single mode fiber coupler to form a fiber loop, and making the time delay of the fiber loop odd times the half period of the input optical pulses, optical pulses with a multiplying repetition rate at the other output port of the coupler were obtained. Utilizing three loop connecting fiber couplers concatenated, optical pulses with an eight times repetition rate were obtained. Experimental results show that, this scheme has several advantages, such as easy adjusting for pulse amplitude and pulse interval, large output power, low cost and easy fabrication.