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首页> 外文会议>Physics and simulation of optoelectronic devices XXIII >Fiber-Optic Analog-to-NRZ Binary Conversion
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Fiber-Optic Analog-to-NRZ Binary Conversion

机译：光纤模拟-NRZ二进制转换

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A novel photonic analog-to-binary converter based on the first-order asynchronous delta-sigma modulation (ADSM) has been theoretically investigated and experimentally demonstrated. A fiber-optic prototype ADSM system is constructed and characterized. Delta-sigma modulation is a straightforward approach to A/D conversion because in this case an external clocking is not required and demodulation can be simply performed via a low-pass filtering process. To improve signal-to-noise ratio and thus system ENOB, a non-interferometric optical implementation has been constructed. The ADSM is comprised of three photonic devices: an inverted output photonic leaky integrator, bistable quantizer, and positive corrective feedback. The photonic integrator which is a recirculating loop performs the oversampling of an analog input using the cross-gain modulation in an SOA. We will show that the photonic ADSM produces an inverted non-return-to-zero (NRZ) pulse-density modulated output describing an input analog signal. This fiber-optic ADSM converts up to 7.6 MHz analog input at about 30 MS/s and effective ENOB of 6.
机译：理论上研究和实验证明了一种基于一阶异步delta-sigma调制（ADSM）的新型光子模拟-二进制转换器。构造并表征了光纤原型ADSM系统。 Delta-sigma调制是A / D转换的一种直接方法，因为在这种情况下，不需要外部时钟，并且可以通过低通滤波过程简单地执行解调。为了提高信噪比并因此提高系统ENOB，已构建了一种非干涉光学实现。 ADSM由三个光子器件组成：反相输出光子漏积分器，双稳态量化器和正校正反馈。作为循环回路的光子积分器使用SOA中的交叉增益调制对模拟输入进行过采样。我们将展示光子ADSM产生一个描述输入模拟信号的反相不归零（NRZ）脉冲密度调制输出。该光纤ADSM以大约30 MS / s的速度和高达6的有效ENOB转换高达7.6 MHz的模拟输入。

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