Time-dependent characteristic of negative feedback optical amplifier at bit rates 10-Gbit/s based on an optical triode

Yuki Harada; Mohamad Syafiq Azmi; Siti Aisyah Azizan; Takaomi Matsutani; Yoshinobu Maeda

doi:10.1117/12.2070308

6 January 2015 Time-dependent characteristic of negative feedback optical amplifier at bit rates 10-Gbit/s based on an optical triode

Yuki Harada, Mohamad Syafiq Azmi, Siti Aisyah Azizan, Takaomi Matsutani, Yoshinobu Maeda

Author Affiliations +

Proceedings Volume 9450, Photonics, Devices, and Systems VI; 94501J (2015) https://doi.org/10.1117/12.2070308
Event: Photonics Prague 2014, 2014, Prague, Czech Republic

Abstract

We proposed and demonstrated an all-optical triode based on a tandem wavelength converter using cross-gain modulation (XGM) in semiconductor optical amplifiers (SOAs). Negative feedback optical amplification scheme, which has the key advantages of reducing bit error rate and waveform reshaping at the output, was employed in this optical triode. This scheme utilizes an input signal and a negative feedback signal (a signal with reverse intensity to the input) and they were fed together into the optical amplifier. Manipulating the intensity of negative feedback signal enabled the noise suppression effect to be optimized and the outputs recorded improvements in bit error rate (BER) and also undergone waveform reshaping shown by the eye-pattern. In negative feedback optical amplifier, the negative feedback signal and input signal were fed into the SOA. However, due to XGM mechanism, there is a setback in which both signals could not be simultaneously fed. Therefore, by using an optical delay, negative feedback timing was manipulated and we investigate timing characteristics of negative feedback optical amplifier with BER and eye-pattern waveforms at 10 Gb/s.

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Yuki Harada, Mohamad Syafiq Azmi, Siti Aisyah Azizan, Takaomi Matsutani, and Yoshinobu Maeda "Time-dependent characteristic of negative feedback optical amplifier at bit rates 10-Gbit/s based on an optical triode ", Proc. SPIE 9450, Photonics, Devices, and Systems VI, 94501J (6 January 2015); https://doi.org/10.1117/12.2070308

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