Gain control of semiconductor optical amplifier using a bandpass filter in a feedback loop

Khurram Karim Qureshi; Hwa Yaw Tam; Chao Lu; Ping Kong Alexander Wai

doi:10.1109/LPT.2007.903501

Gain control of semiconductor optical amplifier using a bandpass filter in a feedback loop

Khurram Karim Qureshi, Hwa Yaw Tam, Chao Lu, Ping Kong Alexander Wai

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

7 Citations (Scopus)

Abstract

The authors present a simple configuration of a gainclamped semiconductor optical amplifier (GC-SOA) based on automatic intensity control of a feedback light generated by amplified spontaneous emission, using a narrowbandwidth thin-film-tunable filter. Experimental results show that the proposed amplifier has good gain clamping characteristics and the feedback light dramatically reduces steady and transient gain variations. The feedback light operates satisfactorily with the channel's add-drop frequency up to 20.9 kHz.We also examined the performance of the GC-SOA by employing the feedback light at different wavelengths.

Original language	English
Pages (from-to)	1401-1403
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	19
Issue number	18
DOIs	https://doi.org/10.1109/LPT.2007.903501
Publication status	Published - 15 Sept 2007

Keywords

Optical gain control
Relaxation oscillations
Semiconductor optical amplifier (SOA)

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

More information

10.1109/LPT.2007.903501

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AU - Qureshi, Khurram Karim

AU - Tam, Hwa Yaw

AU - Lu, Chao

AU - Wai, Ping Kong Alexander

PY - 2007/9/15

Y1 - 2007/9/15

N2 - The authors present a simple configuration of a gainclamped semiconductor optical amplifier (GC-SOA) based on automatic intensity control of a feedback light generated by amplified spontaneous emission, using a narrowbandwidth thin-film-tunable filter. Experimental results show that the proposed amplifier has good gain clamping characteristics and the feedback light dramatically reduces steady and transient gain variations. The feedback light operates satisfactorily with the channel's add-drop frequency up to 20.9 kHz.We also examined the performance of the GC-SOA by employing the feedback light at different wavelengths.

AB - The authors present a simple configuration of a gainclamped semiconductor optical amplifier (GC-SOA) based on automatic intensity control of a feedback light generated by amplified spontaneous emission, using a narrowbandwidth thin-film-tunable filter. Experimental results show that the proposed amplifier has good gain clamping characteristics and the feedback light dramatically reduces steady and transient gain variations. The feedback light operates satisfactorily with the channel's add-drop frequency up to 20.9 kHz.We also examined the performance of the GC-SOA by employing the feedback light at different wavelengths.

KW - Optical gain control

KW - Relaxation oscillations

KW - Semiconductor optical amplifier (SOA)

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JO - IEEE Photonics Technology Letters

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Gain control of semiconductor optical amplifier using a bandpass filter in a feedback loop

Abstract

Keywords

ASJC Scopus subject areas

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