Optical transmission modules for multi-channel superconducting quantum interference device readouts.
Optical transmission modules for multi-channel superconducting quantum interference device readouts.
复制标题
用于多通道超导量子干涉器件读出的光传输模块。
DOI：
10.1063/1.4847095
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Kiwoong Kim
中科院分区：
文献类型：
--
作者：
Jin;Hyukchan Kwon;Kwon;Yong;Kiwoong Kim
我们开发了一种光传输模块，由 16 通道模数转换器 (ADC)、数字噪声滤波器和单线串行发送器组成，通过单根光缆将超导量子干涉装置 (SQUID) 读出数据传输到计算机。 16通道ADC以1.5 kSample/s的采样率发出SQUID读出数据，其中包括8位通道的32位串行数据和24位电压数据。数字噪声滤波器抑制数字时钟产生的数字噪声，以获得尽可能大的 SQUID 调制。单线串行发送器将32位串行数据重组为包含数据和时钟的调制数据，并通过单根光缆发送。当光传输模块应用于152通道SQUID脑磁图系统时，该系统在100 Hz时保持3 fT/√Hz的场噪声水平。
We developed an optical transmission module consisting of 16-channel analog-to-digital converter (ADC), digital-noise filter, and one-line serial transmitter, which transferred Superconducting Quantum Interference Device (SQUID) readout data to a computer by a single optical cable. A 16-channel ADC sent out SQUID readouts data with 32-bit serial data of 8-bit channel and 24-bit voltage data at a sample rate of 1.5 kSample/s. A digital-noise filter suppressed digital noises generated by digital clocks to obtain SQUID modulation as large as possible. One-line serial transmitter reformed 32-bit serial data to the modulated data that contained data and clock, and sent them through a single optical cable. When the optical transmission modules were applied to 152-channel SQUID magnetoencephalography system, this system maintained a field noise level of 3 fT/√Hz @ 100 Hz.