Recent Publications  
   
  1. S. Yan, D. Wang, Y. Gao, C. Lu, A. P. T. Lau, Y. Zhu, Y. Dai, and X. Xu, "Generation of 64-QAM signals using a single dual-drive IQ modulator driven by 4-level and binary electrical signals,", in OFC/NFOEC, 2013, Paper OM3C.5.[Download]
    Abstract: A simple square 64-QAM generation technique using a commercially available dual- drive IQ modulator driven by 4-level and binary electrical signals is proposed. Polarization multiplexed (PM) 64-QAM signals at 20Gbaud/s are experimentally demonstrated.
 
  2. S. Yan, X. Weng, Y. Gao, C. Lu, A. P. T. Lau, Y. Ji, L. Liu, and X. Xu, "Generation of Square or Hexagonal 16-QAM Signals Using a Single Dual Drive IQ Modulator Driven by Binary Signals", Opt. Express, vol. 20, no. 27, pp. 29023–29034, Dec. 2012.[Download]
    Abstract: We propose a simple square or hexagonal 16-QAM signal generation technique using a commercially available dual-drive IQ modulator driven by four binary electrical signals with properly designed amplitudes. We analytically derive the required driving signal amplitudes for square and hexagonal 16-QAM and characterize its implementation penalty. Polarization-multiplexed (PM)-16-QAM signals at 28 Gbuad are experimentally demonstrated and stable performance is achieved with simple bias control.
 
  3. Shuangyi Yan,Dawei Wang, Yuliang Gao, Chao Lu, Alan Pak Tao Lau, Lei Liu and Xiaogeng Xu "Generation of Square or Hexagonal 16-QAM Signals Using a Single Dual Drive IQ Modulator Driven by Binary Signals", OFC/NFOEC 2012, March4-8,2012, Paper OW3H.3. [Download]
    Abstract: A simple square or hexagonal 16-QAM generation technique using a commercially available dual drive IQ modulator driven by 4 binary signals is proposed. Square or hexagonal polarization multiplexed (PM) 16-QAM signals at 25Gbaud/s are experimentally demonstrated. 
 
  4. S Y Yan, X P Xie, Z Q Hui, H Feng and W Zhao, "Generation of 10 GHz, 1.9 ps optical pulse train using semiconductor optical amplifier and Silica-based highly nonlinear fiber", Journal of Optics, Vol. 12, 2010, p. 085401. [Download]
    Abstract: We propose a simple approach to generate high quality 10-GHz 1.9-ps optical pulse train using a SOA and silica-based highly nonlinear fiber. An optical pulse generator based on our proposed scheme is easy to setup with commercially available optical components. A 10-GHz, 1.9-ps optical pulse train is obtained with timing jitter as low as 60 fs over the frequency range 10 Hz–1 MHz. With a wavelength tunable CW laser, a wide wavelength tunable span can be achieved over the entire C band. The proposed optical pulse generator also can operate at different repetition rate from 3 GHz to 10 GHz.
 
  5. S. Yan, W. Zhao, X. Xie, and H. Lu, “Simple approach to picosecond pulse generation based on semiconductor optical amplifier,” Electronics Letters, vol. 46, May. 2010, pp. 703-704.[Download]
    Abstract: A simple optical pulse generator based on a semiconductor optical amplifier (SOA) is demonstrated with an easy-generated external optical pulse sequence. Using the cross-gain modulation and selfphase modulation effects inside an SOA, the simple optical pulse generator generates a 10 GHz 3.8 ps optical pulse train with an extremely low timing jitter of 60 fs.
 
  6. S. Yan, J. Zhang, and W. Zhao, "SOA-based actively mode-locked fiber ring laser by forward injecting an external pulse train," Optics Communications, vol. 283, Jan. 2010, pp. 87-92.  [Download]
    Abstract: An actively mode-locked fiber ring laser based on cross-gain modulation (XGM) in a semiconductor optical amplifier (SOA) is demonstrated to operate stably with a simple configuration. By forward injecting an easily-generated external pulse train, the mode-locked fiber laser can generate an optical-pulse sequence with pulsewidth about 6 ps and average output power about 7.9 mW. The output pulses show an ultra-low RMS jitter about 70.7 fs measured by a RF spectrum analyzer. The use of the proposed forward-injection configuration can realize the repetition-rate tunability from 1 to 15 GHz for the generated optical-pulse sequences. By employing a wavelength-tunable optical band-pass filter in the laser cavity, the operation wavelength of the designed SOA-based actively mode-locked fiber laser can be tuned continuously in a wide span between 1528 and 1565 nm. The parameters of external-injection optical pulses are studied experimentally to optimize the mode-locked fiber laser.
 
   
  7. S. Yan, J. Zhang, and W. Zhao, "SOA-based polarity-preserving all-optical wavelength conversion at 80Gbit/s: Wide conversion range, well dynamic characteristics and polarization insensitive," Microwave and Optical Technology Letters, vol. 50, 2008, pp. 2392-2399.[Download]
    Abstract: This letter presents the effective design of a tunable 80 Gbit/s wavelength converter with a simple configuration consisting of a single semiconductor optical amplifier (SOA) and an optical bandpass filter (OBPF). Based on both cross-gain and cross-phase modulation in SOA, the polarity-preserved, ultrafast wavelength conversion is achieved by appropriately filtering the blue-chirped spectral component of a probe light. Moreover, the experiments are carried out to investigate into the wavelength tunability and the maximum tuning range of the designed wavelength converter. Our results show that a wide wavelength conversion range of nearly 35 nm is achieved with 21-nm downconversion and 14-nm upconversion, which is substantially limited by the operation wavelength ranges of a tunable OBPF and a tunable continuous-wave laser in our experiment. We also exploited the dynamics characteristics of the wavelength converter with variable input powers and different injection current of SOA.
 
  8. Yan shuangyi, Zhang jianguo, Zhao Wei, Lu hongqiang,Wang Weiqiang, "Broadly tunable SOA-Based active mode-locked fibre ring laser by forward injection optical pulse", Chinese Physics Letters, Vol.25, No.8, 2008, pp.2876-2879.[Download]
    Abstract: We present a broadly tunable active mode-locked fibre ring laser based on a semiconductor optical amplifier
(SOA), with forward injection optical pulses. The laser can generate pulse sequence with pulsewidth about 12 ps and high output power up to 8.56dBm at 2.5 GHz stably. Incorporated with a wavelength-tunable optical bandpass filter, the pulse laser can operate with a broad wavelength tunable span up to 37nm with almost constant pulsewidth. A detailed experimental analysis is also carried out to investigate the relationship between the power of the internal cavity and the pulsewidth of the output pulse sequence. The experimental configuration of the pulse laser is very simple and easy to setup with no polarization-sensitive components.
 
9. Yan shuangyi, Zhang jianguo, Zhao Wei, Lu hongqiang,Wang Weiqiang, "Broadly tunable SOA-Based active mode-locked fibre ring laser by forward injection optical pulse", Chinese Physics Letters, Vol.25, No.8, 2008, pp.2876-2879.[Download]
  Abstract: We present a broadly tunable active mode-locked fibre ring laser based on a semiconductor optical amplifier
(SOA), with forward injection optical pulses. The laser can generate pulse sequence with pulsewidth about 12 ps and high output power up to 8.56dBm at 2.5 GHz stably. Incorporated with a wavelength-tunable optical bandpass filter, the pulse laser can operate with a broad wavelength tunable span up to 37nm with almost constant pulsewidth. A detailed experimental analysis is also carried out to investigate the relationship between the power of the internal cavity and the pulsewidth of the output pulse sequence. The experimental configuration of the pulse laser is very simple and easy to setup with no polarization-sensitive components.
10. Yan Shuangyi, Zhang Jianguo, Zhao Wei, "40-GHz wavelength tunable mode-locked SOA-based fiber laser with 40-nm tuning range", Chinese Optics Letters, Vol.6, No.9, 2008, pp.676-678.[Download]
  Abstract: A 40-GHz wavelength tunable mode-locked fiber ring laser based on cross-gain modulation in a semiconductor optical amplifier (SOA) is presented. Pulse trains with a pulse width of 10.5 ps at 40-GHz repetition frequency are obtained. The laser operates with almost 40-nm tuning range. The relationship between the key laser parameters and the output pulse characteristics is analyzed experimentally.
   
Conference Preceeding  
   
1. Oral presentation in APOC 2007,Yan Shunagyi, Zhang Jianguo, Zhou Jun, Zhao Wei, "Characteristics of active mode-locked fiber ring laser based on semiconductor optical amplifier", SPIE, Vol.7134, 2008, pp.71342X-1-71342X-12.[Download]
   
Patents  
   
  1. 一种基于D触发器的解复用系统,第一发明人,200920031711 (实用新型专利)
 
  2. 基于半导体光放大器的外注入式线性腔主动锁模光纤激光器,第一发明人,公开号:CN101740994A (发明专利)
 
  3. 一种可对周期性光脉冲波形整形与波长变换的装置 ,第三发明人,公开号:CN101557261 (发明专利)