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日本电报电话公司的一个研究小组已公开演示了100个窄带宽半导体输出的波分复用。在1550nm窗口,各信道以10GHz间隔传送622Mb/s的频移键控信号。实验表明:“无按收降低”。日本电报电话公司的研究小组采用2×2熔融光纤耦合器构成的128×128星形耦合器来复用激光信号。该星形耦合器的端一端损耗为23.5±2.5dB。在实验中,试验长度的光纤连接在输出端和多路复用器(即选频开关网)之间。多路复用器网由七只Mach-Zender滤波器串联而成,频率间隔为640、320、160、80、40、20和10GHz。
A research group at Nippon Telegraph and Telephone Corporation has publicly demonstrated wavelength division multiplexing of 100 narrow-bandwidth semiconductor outputs. In the 1550nm window, each channel transmits a 622 Mb / s FSK signal at 10 GHz intervals. Experiments show that: “no reduction according to income.” The research team at Nippon Telegraph and Telephone Corporation used a 128 × 128 star coupler made of 2 × 2 fused fiber couplers to multiplex the laser signals. The star coupler has an end loss of 23.5 ± 2.5 dB. In the experiment, the experimental length of the optical fiber connected between the output and the multiplexer (ie, frequency selective switch network). The multiplexer network is made up of seven Mach-Zender filters in series with frequency intervals of 640, 320, 160, 80, 40, 20 and 10 GHz.