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Optical Engineering

Multichannel packets buffering in cascaded double-loop optical buffer based on the pure phase switching of gain-transparent semiconductor optical amplifier
Author(s): Yongjun Wang; Xiangjun Xin; Shang Chao
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Paper Abstract

An innovative cascaded double-loop optical buffer (DLOB) with a large dynamic variable delay suitable for buffering multichannel data packets is proposed and demonstrated. In this buffer, the pure phase modulation of the gain-transparent semiconductor optical amplifier (GT-SOA) is used as the optical switching, and then an experimental system with two buffering units is established. The data packets carried out on four different wavelengths have been stored for 12 round trips successively in DLOB1 and DLOB2, and a long delay time of 39.6 μs has been achieved. The pulse distortion, pattern effect, and channel crosstalk caused by the SOA’s nonlinear gain, carrier recovery time, cross-phase modulation, and cross-gain modulation have been eliminated clearly, and the accumulation of ASE noise has also been effectively mitigated. The signal details, the eye diagrams, and the bit error ratio curves for all four wavelengths show that the proposed optical buffer is an effective approach for buffering multichannel data packets, especially when the GT-SOA’s transmission loss decreases in the near future.

Paper Details

Date Published: 3 January 2014
PDF: 6 pages
Opt. Eng. 53(1) 016101 doi: 10.1117/1.OE.53.1.016101
Published in: Optical Engineering Volume 53, Issue 1
Show Author Affiliations
Yongjun Wang, Beijing Univ. of Posts and Telecommunications (China)
Xiangjun Xin, Beijing Univ. of Posts and Telecommunications (China)
Shang Chao, Beijing Univ. of Posts and Telecommunications (China)

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