A novel scheme of optical packet power equalization is proposed by utilizing the gain characteristic of FP-SOA sensitive to input optical power. The steep gain descending curve with the carrier density provides that the high-power input optical signal obtains the low gain and the low-power one achieves the high gain. Real-time controlling mechanism according to input optical power is aborted in this scheme. The working principle of optical power equalizer based on FP-SOA is introduced in detail. The simulations show that 10 dB pulse peak power variation can be clamped in less than 1 dB. The impact of the injecting current, pulse width and pulse period are investigated and discussed.
A novel label abstraction and erasion scheme based on a FP-SOA is proposed for all-optical separation of the bit-serial label from payload and its performance is investigated by simulation. Fabry-Perot semiconductor optical amplifier (FP-SOA) is attractive not only due to simple fabrication without anti-reflection coating step but also due to its signal amplification capability and strong nonlinearity to perform all-optical label processing. Important features of this scheme are that it does not make use of any high-speed electronics and that only one device is needed. Using this scheme, label abstraction and erasion can be realized with the extinction ratio of 9.72 dB and 7.05dB, respectively. And the influence of pulse width ratio between the label and payload pulse on the extinction ratio is also investigated. We find that for a given case, there must be an optimized pulse width ratio to make the extinction ratio largest. It depends on working points of the label pulses and payload pulses in the gain curve.
A novel label erasion scheme based on a FP-SOA is proposed for all-optical separation of the subcarrier multiplexing
(SCM) label from payload and its performance is investigated by simulation. Fabry-Perot semiconductor optical
amplifier (FP-SOA) is attractive not only due to simple fabrication without anti-reflection coating step but also due to its
signal amplification capability and strong nonlinearity to perform all-optical label processing. Important features of this
scheme are that it does not make use of any high-speed electronics. Using FP-SOA as optical SCM label eraser,
more than 9db extinction ratio can be obtained. Meantime the payload can be amplified by more than 11dB.
In this scheme, FP-SOA acts as a low-pass filter as while as an amplifier.
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