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Opto-Electronics and Communications Conference (OECC)

4bits all-optical quantization based on the Raman self-frequency shift and spectral compression

Rui Liang, Xiaojun Zhou, Zhiyao Zhang, Zujun Qin

Published Jul 1, 2009• 0 citations
Publisher

Abstract

We numerically analyze the all-optical quantization based on the Raman self-frequency shift in a photonic crystal fiber. Resolution of 4bits can be realized with increasing a dispersion-decreasing fiber to compress the shifted spectrum.
DOI
10.1109/oecc.2009.5218882

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Optoelectronics Letters•Jan 1, 2009•0 citations
A novel optical spectrum compression scheme based on time-dependent filtering is proposed and demonstrated. The spectrum compression is realized by using nonlinear polarization rotation effect to achieve power-dependent filtering of a chirped soliton pulse. In the experiment, a single-stage spectrum compression unit based on the proposed scheme is employed in the soliton self-frequency shift-based optical quantization system to improve the quantization resolution. The experimental results show that an average output spectrum width of 1.5 nm is obtained using the proposed scheme, which is 68% of that using the traditional comb-like fiber scheme. In addition, the quantization resolution using the proposed scheme is 5.1 bits, which is 0.6 bit higher than that using a single-stage spectrum compression unit based on the traditional comb-like fiber structure.
所有光的量子化基于在 photonic 水晶纤维(PCF ) 的拉曼自我频率移动(RSFS ) 并且光谱在增加分散的纤维(DIF ) 的压缩被分析，并且在纤维的 femtosecond 脉搏的进化被数字地解决概括非线性的 Schr 描述 ? 黑人方程(GNLSE ) 。有 300 fs 的宽度和 1550 nm 的中心波长的 Gaussian 脉搏被注入 15 m 长的 PCF 和 100 m 长的 DIF。模拟结果证明中心波长与从 110 W 改变到 165 W 的输入山峰力量线性地增加。65.3 nm 的 RSFS 并且最大光谱压缩比率 3.38 能被获得。量子化的决定被使用从 2.4 位改进到 4 位光谱在 DIF 的压缩。