40Gb/s all-optical digital encoder/comparator based on semiconductor optical amplifiers

Yang Wang; Xinliang Zhang; Jianji Dong; Dexiu Huang

doi:10.1117/12.743261

19 November 2007 40Gb/s all-optical digital encoder/comparator based on semiconductor optical amplifiers

Yang Wang, Xinliang Zhang, Jianji Dong, Dexiu Huang

Proceedings Volume 6782, Optoelectronic Materials and Devices II; 678208 (2007) https://doi.org/10.1117/12.743261
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

Abstract

We proposed, experimentally and theoretically demonstrated all-optical two line-four line encoder and two bit-wise comparator of RZ data streams at 40Gb/s based on cross gain modulation (XGM) and four wave mixing (FWM) in three parallel SOAs. Five logic functions for digital encoder and comparator between two signals A and B: A¯ B¯, AB¯, AB¯, AB and A¯⊗¯B¯, were achieved simultaneously. The first three optical logics are realized based on XGM in SOAs, the fourth is realized with FWM, and the fifth is the mixing result of the first and the fourth. A detuning filter is employed to improve the output performance. The output extinction ratio (ER) for the XGM operation is above 10dB, and the ER for FWM operation is around 8 dB. Wide and clear eye patterns for the five logic outputs can be observed. The all optical digital encoder/comparator we demonstrated has advantages of simple structure, multifunctional optical logic functions and high speed.

Citation Download Citation

Yang Wang, Xinliang Zhang, Jianji Dong, and Dexiu Huang "40Gb/s all-optical digital encoder/comparator based on semiconductor optical amplifiers", Proc. SPIE 6782, Optoelectronic Materials and Devices II, 678208 (19 November 2007); https://doi.org/10.1117/12.743261

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KEYWORDS

Logic

Computer programming

Logic devices

Modulation

Optical logic

Semiconductor optical amplifiers

Eye

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