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


Speckle patterns generated by multimode fibers enable accurate wavelength measurements. However, the measurement speed is limited by the frame rate of the camera. We propose a compact and cost-effective ultrafast wavemeter based on multimode and multicore fibers, which employs spectral–spatial–temporal mapping. 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.

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