Experimental investigation on slow light via four-wave mixing in semiconductor optical amplifier

doi:10.1007/s12200-009-0048-2

Front Optoelec Chin

2009, Vol. 2

Issue (3) : 259-263 https://doi.org/10.1007/s12200-009-0048-2

RESEARCH ARTICLE

Experimental investigation on slow light via four-wave mixing in semiconductor optical amplifier

Yin ZHANG, Xinliang ZHANG(

), Xi HUANG, Cheng CHENG

Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

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Abstract

Optical buffer is a key component in all optical information processing systems. Slow light at room temperature via four-wave mixing (FWM) in semiconductor optical amplifier (SOA) is experimentally investigated. Time delay of 0.40 ns is achieved for a sinusoidal modulation signal at 0.1 GHz, corresponding to a delay bandwidth product (DBP) of 0.04. Factors that affect the experimental results are discussed. It is found out that the variable optical delay via FWM in SOA can be controlled either electrically by changing the SOA bias or optically by varying the pump power or pump-probe detuning.

Keywords optical communication slow light four-wave mixing (FWM) semiconductor optical amplifier (SOA)

Corresponding Author(s): ZHANG Xinliang,Email:xlzhang@mail.hust.edu.cn

Issue Date: 05 September 2009

Cite this article:

Xinliang ZHANG,Xi HUANG,Cheng CHENG, et al. Experimental investigation on slow light via four-wave mixing in semiconductor optical amplifier[J]. Front Optoelec Chin, 2009, 2(3): 259-263.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-009-0048-2
https://academic.hep.com.cn/foe/EN/Y2009/V2/I3/259

Fig.1 Experimental setup to investigate tunable delay in SOA: PD (SHF 47100A O/E convertor, bandwidth: 40 GHz, center operating wavelength at 1550 nm); OSA: oscilloscope (Tektronix TDS 3052B, bandwidth: 500 MHz); RF-SA: radio frequency spectrum analyzer (Anritsu MS2667C, 9 kHz-30 GHz); OSA: optical spectrum analyzer (Anritsu MS9710C, 600-1750 nm); and radio frequency signal generator (Agilent E8247C, 250 kHz-20 GHz).

Fig.2 Oscilloscope time traces of modulated probe signal (0.1 GHz) for different detuning values (A signal: a sinusoidal modulated signal at 0.1 GHz from signal generator, as a reference signal; B, C, D signal: all sinusoidal modulated signal at 0.1 GHz, detected modulated signal for detuning of -6.66 GHz, -23. 82 GHz and -28.98 GHz, respectively).

Fig.3 Optical spectrum for various pump-probe detuning. (a) Optical spectrum as detuning is -6.66 GHz; (b) optical spectrum as detuning is -23.82 GHz; (c) optical spectrum as detuning is -28.98 GHz

Fig.4 Beating frequency spectrum for different pump-probe detuning. (a) Beating frequency spectrum as detuning is -6.66 GHz; (b) beating frequency spectrum as detuning is -23.82 GHz; (c) beating frequency spectrum as detuning is -28.98 GHz

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