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International Conference on Optical Communications and Networks (ICOCN)

A Quantization Scheme by Slicing Supercontinuum Spectrum in an All-Normal Dispersion Silicon Nitride Ridge Waveguide

Shipei Jing, Rui Ma, Kuiru Wang, Jinhui Yuan, Chao Mei, Binbin Yan, Xinzhu Sang, Chongxiu Yu

Published Aug 1, 2019• 0 citations
Publisher

Abstract

In this paper, we propose an all normal dispersion silicon nitride waveguide for optical quantization. The results show that a 6-bit quantization resolution is successfully achieved with an effective number of bit of 5.978 bit.
DOI
10.1109/icocn.2019.8934828

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All-optical analog-to-digital conversion is a paramount issue in modern science. How to implement real-time and ultrafast quantization to optical pulses with different intensities in an all-optical domain is a central problem. Here, we report a real-time demonstration of an all-optical quantization scheme based on slicing the supercontinuum in a nonlinear fiber. In comparison with previous schemes through off-line analysis of the power of different optical spectral components in the supercontinuum, this, to the best of our knowledge, is the first demonstration of such functionality online in the time domain. Moreover, the extinction ratio among the quantized outputs can exceed 10 dB, which further confirms the feasibility of the proposed quantization scheme. The current 3 bit resolution in the proof-of-principle experiment is limited by the current experimental condition, but it can be expected to be greatly enhanced through improving both the spectral width of the generated supercontinuum and the number of filtering channels used.
All-optical analog-to-digital conversion play an important role in optical communication,it can realize the high sampling-rate,high bit-resolution by using photonic-electronic technology.All-opical quantization is a key module in all-optical analog-to-digital conversion which determine speed and resolution of the conversion directly.In this paper,we purpose a new scheme of all-optical quantization based on slicing supercontiuum spectrum and design a testifying optical circuit for simulating.The results show that the scheme is efficient for all-optical quantization.