中国物理B ›› 2008, Vol. 17 ›› Issue (11): 4226-4231.doi: 10.1088/1674-1056/17/11/045

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All-optical error-bit amplitude monitor based on NOT and AND gates in cascaded semiconductor optical amplifiers

董建绩, 张新亮, 黄德修   

  1. Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2008-02-15 修回日期:2008-04-30 出版日期:2008-11-20 发布日期:2008-11-20
  • 基金资助:
    Project partially supported by the National High Technology Developing Program of China (Grant No 2006AA03Z0414), the National Basic Research Program of China (Grant No 2006CB302805), the Science Fund for Distinguished Young Scholars of Hubei Province, China (Grant No 2006ABB017), and the Program for New Century Excellent Talents in Ministry of Education of China (Grant No NCET-04-0715).

All-optical error-bit amplitude monitor based on NOT and AND gates in cascaded semiconductor optical amplifiers

Dong Jian-Ji (董建绩), Zhang Xin-Liang (张新亮), Huang De-Xiu (黄德修)   

  1. Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2008-02-15 Revised:2008-04-30 Online:2008-11-20 Published:2008-11-20
  • Supported by:
    Project partially supported by the National High Technology Developing Program of China (Grant No 2006AA03Z0414), the National Basic Research Program of China (Grant No 2006CB302805), the Science Fund for Distinguished Young Scholars of Hubei Province, China (Grant No 2006ABB017), and the Program for New Century Excellent Talents in Ministry of Education of China (Grant No NCET-04-0715).

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摘要： This paper proposes and simulates a novel all-optical error-bit amplitude monitor based on cross-gain modulation and four-wave mixing in cascaded semiconductor optical amplifiers (SOAs), which function as logic NOT and logic AND, respectively. The proposed scheme is successfully simulated for 40\,Gb/s return-to-zero (RZ) signal with different duty cycles. In the first stage, the SOA is followed by a detuning filter to accelerate the gain recovery as well as improve the extinction ratio. A clock probe signal is used to avoid the edge pulse-pairs in the output waveform. Among these RZ formats, 33{\%} RZ format is preferred to obtain the largest eye opening. The normalized error amplitude, defined as error bit amplitude over the standard mark amplitude, has a dynamic range from 0.1 to 0.65 for all RZ formats. The simulations show small input power dynamic range because of the nonlinear gain variation in the first stage. This scheme is competent for nonreturn-to-zero format at 10Gb/s as well.

关键词: semiconductor optical amplifier, nonlinear optics, optical communications devices

Abstract: This paper proposes and simulates a novel all-optical error-bit amplitude monitor based on cross-gain modulation and four-wave mixing in cascaded semiconductor optical amplifiers (SOAs), which function as logic NOT and logic AND, respectively. The proposed scheme is successfully simulated for 40 Gb/s return-to-zero (RZ) signal with different duty cycles. In the first stage, the SOA is followed by a detuning filter to accelerate the gain recovery as well as improve the extinction ratio. A clock probe signal is used to avoid the edge pulse-pairs in the output waveform. Among these RZ formats, 33% RZ format is preferred to obtain the largest eye opening. The normalized error amplitude, defined as error bit amplitude over the standard mark amplitude, has a dynamic range from 0.1 to 0.65 for all RZ formats. The simulations show small input power dynamic range because of the nonlinear gain variation in the first stage. This scheme is competent for nonreturn-to-zero format at 10Gb/s as well.

Key words: semiconductor optical amplifier, nonlinear optics, optical communications devices

中图分类号:  (Optical computers, logic elements, interconnects, switches; neural networks)

  • 42.79.Ta
42.55.Px (Semiconductor lasers; laser diodes) 42.60.Fc (Modulation, tuning, and mode locking) 42.60.Lh (Efficiency, stability, gain, and other operational parameters) 42.65.Hw (Phase conjugation; photorefractive and Kerr effects) 42.79.Ci (Filters, zone plates, and polarizers)