Measurement of Laser Phase Noise for Ultra-Long Period of 0.8 Seconds With 800-ps Temporal Resolution Using Optical Coherent Detection With FPGA-Implemented Data Acquisition
Measurement of Laser Phase Noise for Ultra-Long Period of 0.8 Seconds With 800-ps Temporal Resolution Using Optical Coherent Detection With FPGA-Implemented Data Acquisition
复制标题
使用光学相干检测和 FPGA 实现的数据采集以 800 ps 时间分辨率测量 0.8 秒超长周期的激光相位噪声
DOI：
10.1109/jlt.2021.3101546
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发表时间：
2021
影响因子：
4.7
通讯作者：
and M. Shigihara
中科院分区：
文献类型：
--
作者：
K. Igarashi;H. Kiwata;M. Kikuta;and M. Shigihara
在这项研究中，我们展示了具有0.8pS S周期和800ps时间分辨率的激光相位噪声测量。通过外差检测接收光载波，采用1.25G采样/S模数转换器和1G字节存储器的现场可编程门阵列电路采集被测电信号。激光相位噪声的可视化使用来自直流附近的场谱图和非常宽的调频噪声谱，这是由我们提出的相位补偿交错快速傅立叶变换构造的。我们比较了外腔激光器和分布反馈半导体激光器的相位噪声特性。
In this study, we demonstrate laser phase noise measurement with a 0.8-s period and an 800-ps temporal resolution. An optical carrier is received by heterodyne detection, and the detected electrical signals are acquired using field programmable gate array circuits with 1.25-GSample/s analog-to-digital converters and 1-GByte memory. The laser phase noise is visualized using a field spectrogram and a very wide FM noise spectrum from near the DC, which is constructed using our proposed phase-compensating interleaved fast Fourier transformation. We compare the phase noise characteristics of an external cavity laser with those of a distributed feedback semiconductor laser.