All-optical differentiator based on cross-gain modulation in semiconductor optical amplifier

All-optical differentiator based on cross-gain modulation in semiconductor optical amplifier

A novel scheme for carrying out all-optical intensity differentiation is proposed and demonstrated based on the cross-gain modulation (XGM) in a semiconductor optical amplifier (SOA). Because of the XGM, the mathematical definition of differentiation can be expressed by the combined power of the amp...

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Veröffentlicht in:Optics letters 2007-10, Vol.32 (20), p.3029-3031
Hauptverfasser: Xu, Jing, Zhang, Xinliang, Dong, Jianji, Liu, Deming, Huang, Dexiu
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Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Optical elements, devices, and systems
Optics
Physics
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container_issue 20
container_start_page 3029
container_title Optics letters
container_volume 32
creator Xu, Jing
Zhang, Xinliang
Dong, Jianji
Liu, Deming
Huang, Dexiu
description A novel scheme for carrying out all-optical intensity differentiation is proposed and demonstrated based on the cross-gain modulation (XGM) in a semiconductor optical amplifier (SOA). Because of the XGM, the mathematical definition of differentiation can be expressed by the combined power of the amplified pump pulse and the delayed modulated probe pulse at the output of the SOA. The final waveform and error evolution versus relative time delay between two pulses is investigated. Interestingly enough, it is shown that the acquisition of good differentiation is possible under zero time delay. A further study of zero time delay has been performed for various data rates and shows that the carrier recovery time of the SOA is a speed-limiting factor of the scheme.
doi_str_mv 10.1364/OL.32.003029
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subjects Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Optical elements, devices, and systems
Optics
Physics
title All-optical differentiator based on cross-gain modulation in semiconductor optical amplifier
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