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Chin. Phys. B, 2016, Vol. 25(4): 044210    DOI: 10.1088/1674-1056/25/4/044210
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Strip silicon waveguide for code synchronization in all-optical analog-to-digital conversion based on a lumped time-delay compensation scheme

Sha Li(李莎)1, Zhi-Guo Shi(石志国)1, Zhe Kang(康哲)2, Chong-Xiu Yu(余重秀)2, Jian-Ping Wang(王建萍)1
1 School of Computer and Communication Engineering, University of Science and Technology Beijing (USTB), Beijing 100083, China;
2 State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, China
Abstract  An all-optical analog-to-digital converter (ADC) based on the nonlinear effect in a silicon waveguide is a promising candidate for overcoming the limitation of electronic devices and is suitable for photonic integration. In this paper, a lumped time-delay compensation scheme with 2-bit quantization resolution is proposed. A strip silicon waveguide is designed and used to compensate for the entire time-delays of the optical pulses after a soliton self-frequency shift (SSFS) module within a wavelength range of 1550 nm-1580 nm. A dispersion coefficient as high as -19800 ps/(km·nm) with ± 0.5 ps/(km·nm) variation is predicted for the strip waveguide. The simulation results show that the maximum supportable sampling rate (MSSR) is 50.45 GSa/s with full width at half maximum (FWHM) variation less than 2.52 ps, along with the 2-bit effective-number-of-bit and Gray code output.
Keywords:  all-optical analog-to-digital conversion      silicon waveguide      soliton self-frequency shift      time-delay compensation  
Received:  29 September 2015      Revised:  03 November 2015      Accepted manuscript online: 
PACS:  42.65.Tg (Optical solitons; nonlinear guided waves)  
  42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)  
  42.70.Mp (Nonlinear optical crystals)  
  42.81.Dp (Propagation, scattering, and losses; solitons)  
Fund: Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. FRF-TP-15-030A1) and China Postdoctoral Science Foundation (Grant No. 2015M580978).
Corresponding Authors:  Sha Li     E-mail:  shalee@ustb.edu.cn

Cite this article: 

Sha Li(李莎), Zhi-Guo Shi(石志国), Zhe Kang(康哲), Chong-Xiu Yu(余重秀), Jian-Ping Wang(王建萍) Strip silicon waveguide for code synchronization in all-optical analog-to-digital conversion based on a lumped time-delay compensation scheme 2016 Chin. Phys. B 25 044210

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