Supercontinuum generation in a nonlinear ultra-silicon-rich nitride waveguide

Supercontinuum generation is demonstrated in a 3-mm-long ultra-silicon-rich nitride (USRN) waveguide by launching 500 fs pulses centered at 1555 nm with a pulse energy of 17 pJ. The generated supercontinuum is experimentally characterized to possess a high spectral coherence, with an average | g 12...

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Bibliographic Details
Published in:Scientific reports 2022-06, Vol.12 (1), p.9487-9487, Article 9487
Main Authors: Cao, Yanmei, Sohn, Byoung-Uk, Gao, Hongwei, Xing, Peng, Chen, George F. R., Ng, Doris K. T., Tan, Dawn T. H.
Format: Article
Language:English
Subjects:
639/624/1075/1079
639/624/400/1119
639/624/400/385
Bandwidths
Experiments
Humanities and Social Sciences
Light sources
multidisciplinary
Science
Science (multidisciplinary)
Silicon
Silicon nitride
Simulation
Spectrum allocation
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Summary:Supercontinuum generation is demonstrated in a 3-mm-long ultra-silicon-rich nitride (USRN) waveguide by launching 500 fs pulses centered at 1555 nm with a pulse energy of 17 pJ. The generated supercontinuum is experimentally characterized to possess a high spectral coherence, with an average | g 12 | exceeding 0.90 across the wavelength range of the coherence measurement (1260 nm to 1700 nm). Numerical simulations further indicate a high coherence over the full spectrum. The experimentally measured supercontinuum agrees well with the theoretical simulations based on the generalized nonlinear Schrödinger equation. The generated broadband spectra using 500 fs pulses possessing high spectral coherence provide a promising route for CMOS-compatible light sources for self-referencing applications, metrology, and imaging.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-022-13734-9