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将半导体光放大器(SOA)和滤波器组合使用是实现高速全光信号处理的有效途径。利用半导体光放大器和带宽为0.32nm的可调窄带滤波器同时实现了40Gbit/s的非归零(NRZ)信号的反相波长转换(WC)和非归零到伪归零(PRZ)信号的码型转换,波长转换和码型转换的结果差异取决于滤波器中心波长相对于探测光波长的失谐量。当滤波器的失谐量为-0.24nm时,输出反相的波长转换,此时滤波器起到加速半导体光放大器增益恢复的功能。当滤波器失谐量为+0.41nm和-0.48nm时,得到非归零到伪归零的码型转换,并且产生的伪归零脉冲分别出现在非归零信号的上升沿和下降沿,此时滤波器的作用是将探测光的相位信息转换为强度信息,并且该码型转换结果兼有波长转换的功能。
The combination of a semiconductor optical amplifier (SOA) and a filter is an effective way to achieve high speed all-optical signal processing. Using a semiconductor optical amplifier and a tunable narrow-band filter with a bandwidth of 0.32 nm, both the inverting wavelength conversion (WC) and the non-return to pseudo return (PRZ) signal of a 40 Gbit / s NRZ signal The difference in the result of pattern conversion, wavelength conversion and pattern conversion depends on the amount of detuning of the center wavelength of the filter relative to the wavelength of the probe light. When the filter’s detuning is -0.24nm, the output of the inverted wavelength conversion, filter at this time to speed up the semiconductor optical amplifier gain recovery function. When the filter detuning is + 0.41nm and -0.48nm, the non-return to pseudo-zero pattern conversion is obtained, and the resulting pseudo-zero pulses appear on the rising and falling edge of the non-return-to-zero signal, The function of the filter is to convert the phase information of the probe light into the intensity information, and the result of the pattern conversion combines the function of wavelength conversion.