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

doi:10.1088/1674-1056/25/4/044210

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

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