Breaking the speed limitation of wavemeter through spectra-space-time mapping  

作　　者：Zheng Gao Ting Jiang Mingming Zhang Yuxuan Xiong Hao Wu Ming Tang 

机构地区：[1]Wuhan National Laboratory for Optoelectronics(WNLO)and Next Generation Internet Access National Engineering Laboratory(NGIA),School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Light(Advanced Manufacturing)》2024年第2期33-40,共8页光（先进制造）（英文）

基　　金：supported by the National Key Research and Development Program of China(2021YFB2800902);National Natural Science Foundation of China(61931010,62225110);Hubei Province Key Research and Development Program(2020BAA006).

摘　　要：Speckle patterns generated by the intermodal interference of multimode fibers enable accurate broadband wavelength measurements.However,the measurement speed is limited by the frame rate of the camera that captures the patterns.We propose a compact and cost-effective ultrafast wavemeter based on multimode and multicore fibers,which employs spectral-spatial-temporal mapping.The speckle patterns generated by multimode fibers enable spectral-to-spatial mapping,which is then sampled by a multicore fiber into a pulse sequence to implement spatial-to-temporal mapping.A high-speed single-pixel photodetector is employed to capture the pulse sequence,which is analysed using a multilayer perceptron to estimate the wavelength.The feasibility of the proposed wavelength estimation method is experimentally verified,achieving a measurement rate of 100 MHz with a resolution of 2.7 pm in a 1 nm operation bandwidth.

关 键 词：SPEED Wavemeters SPECTRA 

分 类 号：O433[机械工程—光学工程]