Supporting Information_delayed self-heterodyne spectra.xlsx
<p dir="ltr">Laser linewidth is a critical parameter reflecting spectral purity. To measure it, a delayed self-heterodyne method was employed using a 50-km-long single-mode fiber (SMF-28e) and a 40 MHz acoustic-optic modulator. The heterodyne signal was detected with an InGaAs photod...
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2025
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