Abstract
Two-photon absorption with high intensity pump beam occurs in a SOA depends on fast phase change of a weak probe signal. This work analysed optical XOR logic function using two-photon absorption induced fast phase change. A rate equation for SOA and both input data signals A and B with high intensity, configured in the form of MZI has also been proved. The model shows that XOR operation at 10 Gb/s with good signal to noise ratio is obtained with high input intensities. The result on the generation of XOR indicates that operations on 10 Gb/s with a high signal to noise ratio can easily be implemented. The average input power into the SOA is 20 dbm corresponding to the peak power of 5.5 dBm at 10 Gb/s when the width of the input pulse 3.6 ps. The short narrow pulse width is utilised in the study for stronger effect of two-photon absorption.
Highlights
All optical logic gates are very important in signal regeneration, addressing, switching and data encoding [1].They serve a vital part in upcoming high-speed communication system [2]
Operation of XOR logic gates based on two-photon absorption (TPA) and its induced free carrier effects (FCE) is investigated
When two-photon absorption of pump beam with high intensity occurs in a semiconductor optical amplifier, a fast phase change associated with weak signal probe is generated
Summary
All optical logic gates are very important in signal regeneration, addressing, switching and data encoding [1].They serve a vital part in upcoming high-speed communication system [2]. Operation of XOR logic gates based on two-photon absorption (TPA) and its induced free carrier effects (FCE) is investigated. When two-photon absorption of pump beam with high intensity occurs in a semiconductor optical amplifier, a fast phase change associated with weak signal probe is generated. The rate equation for semiconductor optical amplifier, a high intensity input data signal, has been solved which is constructed within MZI [1] configuration. In order to produce output signal with fast phase change, XOR logic gate based on twophoton absorption is developed. This process occurs when two input signals of pump beams. Phase shifter is added to the circuit in order to shift the output signal for 900 because the signal travelling through the input acquires a phase change subjected to the cross phase modulation [6]
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