Supercontinuum generation in varying dispersion and birefringent silicon waveguide
- 17 October 2019
- journal article
- research article
- Published by Optica Publishing Group in Optics Express
- Vol. 27 (22), 31698-31712
- https://doi.org/10.1364/oe.27.031698
Abstract
Ability to selectively enhance the amplitude and maintain high coherence of the supercontinuum signal with long pulses is gaining significance. In this work, an extra degree of freedom afforded by varying the dispersion profile of a waveguide is utilized to selectively enhance supercontinuum. As much as 16 dB signal enhancement in the telecom window and 100 nm of wavelength extension is achieved with a cascaded waveguide, compared to a fixed dispersion waveguide. Waveguide tapering, in particular with increasing width, is determined to have a flatter and more coherent supercontinuum than a fixed dispersion waveguide when longer input pulses are used. Furthermore, due to the strong birefringence of an asymmetric silicon waveguide the supercontinuum signal is broadened by pumping simultaneously with both quasi-transverse electric (TE) and quasi-transverse magnetic (TM) mode in the anomalous dispersion regime. Thus, selective signal generation is obtained by controlling the dispersion for the two modes. Such waveguides offer several advantages over optical fiber as the variation in dispersion can be controlled with greater flexibility in an integrated platform. This work paves the way forward for various applications in fields ranging from medicine to telecom where specific wavelength windows need to be targeted.Keywords
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Funding Information
- Agency for Science, Technology and Research
- Defense Advanced Research Projects Agency (HR0011-15-C-0056)
This publication has 52 references indexed in Scilit:
- Chip-scale broadband spectroscopic chemical sensing using an integrated supercontinuum source in a chalcogenide glass waveguidePhotonics Research, 2018
- An optical-frequency synthesizer using integrated photonicsNature, 2018
- On-chip visible-to-infrared supercontinuum generation with more than 495 THz spectral bandwidthOptics Express, 2015
- Ultrabroadband supercontinuum generation in a CMOS-compatible platformOptics Letters, 2012
- Full waveform hyperspectral LiDAR for terrestrial laser scanningOptics Express, 2012
- Wavelength-division-multiplexed Millimeter-waveband radio-on-fiber system using a supercontinuum light sourceJournal of Lightwave Technology, 2006
- Soliton-effect compression of supercontinuum to few-cycle durations in photonic nanowiresOptics Express, 2005
- Optical frequency metrologyNature, 2002
- Low-noise, pulsewidth tunable picosecond to femtosecond pulse generation by spectral filtering of wideband supercontinuum with variable bandwidth arrayed-waveguide grating filtersElectronics Letters, 1996
- More than 100-wavelength-channel picosecond optical pulse generation from single laser source using supercontinuum in optical fibresElectronics Letters, 1993