Octave-spanning coherent supercontinuum generation in silicon on insulator from 1.06μm to beyond 2.4μm
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Authors
Singh, Neetesh
Xin, Ming
Vermeulen, Diedrik
Shtyrkova, Katia
Li, Nanxi
Callahan, Patrick T.
Magden, Emir Salih
Ruocco, Alfonso
Fahrenkopf, Nicholas
Issue Date
2018
Type
Article
Language
Keywords
coherence , integrated photonics , silicon , supercontinuum , insulation , semiconductor
Alternative Title
Light: Science & Applications
Abstract
Efficient complementary metal-oxide semiconductor-based nonlinear optical devices in the near-infrared are in strong demand. Due to two-photon absorption in silicon, however, much nonlinear research is shifting towards unconventional photonics platforms. In this work, we demonstrate the generation of an octave-spanning coherent supercontinuum in a silicon waveguide covering the spectral region from the near- to shortwave-infrared. With input pulses of 18 pJ in energy, the generated signal spans the wavelength range from the edge of the silicon transmission window, approximately 1.06 to beyond 2.4 μm, with a − 20 dB bandwidth covering 1.124–2.4 μm. An octave-spanning supercontinuum was also observed at the energy levels as low as 4 pJ (−35 dB bandwidth). We also measured the coherence over an octave, obtaining gð1Þ 12 l ð Þ >90%, in good agreement with the simulations. In addition, we demonstrate optimization of the third-order dispersion of the waveguide to strengthen the dispersive wave and discuss the advantage of having a soliton at the long wavelength edge of an octave-spanning signal for nonlinear applications. This research paves the way for applications, such as chip-scale precision spectroscopy, optical coherence tomography, optical frequency metrology, frequency synthesis and wide-band wavelength division multiplexing in the telecom window.
Description
Citation
Singh, N., Xin, M., Vermeulen, D., Shtyrkova, K., Li, N. X., Callahan, P. T., . . . Watts, M. R. (2018). Octave-spanning coherent supercontinuum generation in silicon on insulator from 1.06 μm to beyond 2.4 μm. Light-Science & Applications, 7, 8. doi:10.1038/lsa.2017.131
Publisher
Changchun Institute of Optics, Fine Mechanics and Physics
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Journal
Volume
Issue
PubMed ID
DOI
ISSN
2047-7538