Quasi-real-time high resolution spectrum analyzer by two-step spectroscopy

Hideto Takayasu; Shuhei Otsuka; Yuma Sato; Takahide Sakamoto

doi:10.1117/12.2648926

15 March 2023 Quasi-real-time high resolution spectrum analyzer by two-step spectroscopy

Hideto Takayasu, Shuhei Otsuka, Yuma Sato, Takahide Sakamoto

Proceedings Volume 12429, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII; 124290K (2023) https://doi.org/10.1117/12.2648926
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

For monitoring high-speed optical telecom signals and/or spectrally broadened light waves, such as optical frequency combs, it is desired to measure the optical spectra with higher bandwidth and resolution. For the purposes, in this paper, we demonstrate a high-resolution and high-speed optical spectrum analyzer that only relies on a DSP operated at a much lower speed. This spectrum analyzer consists of two-stage spectroscopy systems, which is a diffractive grating system and a sampled heterodyne system. We experimentally demonstrate the spectral measurement with greater than 10-pm resolution at 100-kHz acquisition rate covering bandwidth of 5-GHz.

Conference Presentation

Citation Download Citation

Hideto Takayasu, Shuhei Otsuka, Yuma Sato, and Takahide Sakamoto "Quasi-real-time high resolution spectrum analyzer by two-step spectroscopy", Proc. SPIE 12429, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII, 124290K (15 March 2023); https://doi.org/10.1117/12.2648926

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