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Dave U.D.,Photonics Research Group Center for Nano and Biophotonics Photonics | Uvin S.,Photonics Research Group Center for Nano and Biophotonics Photonics | Kuyken B.,Photonics Research Group Center for Nano and Biophotonics Photonics | Selvaraja S.,IMEC | And 2 more authors.
Optics Express | Year: 2013

A 1000 nm wide supercontinuum, spanning from 1470 nm in the telecom band to 2470 nm in the mid-infrared is demonstrated in a 800 nm x 220 nm 1 cm long hydrogenated amorphous silicon strip waveguide. The pump source was a picosecond Thulium doped fiber laser centered at 1950 nm. The real part of the nonlinear parameter of this waveguide at 1950 nm is measured to be 100±10 W -1m-1, while the imaginary part of the nonlinear parameter is measured to be 1.2±0.2 W-1m-1. The supercontinuum is stable over a period of at least several hours, as the hydrogenated amorphous silicon waveguides do not degrade when exposed to the high power picosecond pulse train. ©2013 Optical Society of America. © 2013 Optical Society of America.


Leo F.,Photonics Research Group Center for Nano and Biophotonics Photonics | Kuyken B.,Photonics Research Group Center for Nano and Biophotonics Photonics | Baets R.,Photonics Research Group Center for Nano and Biophotonics Photonics | Roelkens G.,Photonics Research Group Center for Nano and Biophotonics Photonics
Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, BGPP 2014 | Year: 2014

The efficient conversion of light with photon energies lower than the halfband-gapenergy is reported. Record efficiencies are demonstrated in a 7cm dispersion engineered silicon photonic wire at a pump power of 150 mW. © 2014 OSA.


Roelkens G.,Photonics Research Group Center for Nano and Biophotonics Photonics | Dave U.,Photonics Research Group Center for Nano and Biophotonics Photonics | Gassenq A.,Photonics Research Group Center for Nano and Biophotonics Photonics | Hattasan N.,Photonics Research Group Center for Nano and Biophotonics Photonics | And 28 more authors.
IEEE Journal on Selected Topics in Quantum Electronics | Year: 2014

In this paper we discuss silicon-based photonic integrated circuit technology for applications beyond the telecommunication wavelength range. Silicon-on-insulator and germanium-on-silicon passive waveguide circuits are described, as well as the integration of III-V semiconductors, IV-VI colloidal nanoparticles and GeSn alloys on these circuits for increasing the functionality. The strong nonlinearity of silicon combined with the low nonlinear absorption in the mid-infrared is exploited to generate picosecond pulse based supercontinuum sources, optical parametric oscillators and wavelength translators connecting the telecommunication wavelength range and the mid-infrared. © 1995-2012 IEEE.


Roelkens G.,Photonics Research Group Center for Nano and Biophotonics Photonics | Dave U.,Photonics Research Group Center for Nano and Biophotonics Photonics | Gassenq A.,Photonics Research Group Center for Nano and Biophotonics Photonics | Hattasan N.,Photonics Research Group Center for Nano and Biophotonics Photonics | And 26 more authors.
Optical Materials Express | Year: 2013

In this paper we present our recent work on mid-infrared photonic integrated circuits for spectroscopic sensing applications. We discuss the use of silicon-based photonic integrated circuits for this purpose and detail how a variety of optical functions in the mid-infrared besides passive waveguiding and filtering can be realized, either relying on nonlinear optics or on the integration of other materials such as GaSb-based compound semiconductors, GeSn epitaxy and PbS colloidal nanoparticles. © 2013 Optical Society of America.


Leo F.,Photonics Research Group Center for Nano and Biophotonics Photonics | Dave U.,Photonics Research Group Center for Nano and Biophotonics Photonics | Keyvaninia S.,Photonics Research Group Center for Nano and Biophotonics Photonics | Kuyken B.,Photonics Research Group Center for Nano and Biophotonics Photonics | Roelkens G.,Photonics Research Group Center for Nano and Biophotonics Photonics
Optics Letters | Year: 2014

We demonstrate the measurement and tuning of second-to-fourth order dispersion of a silicon wire waveguide in a spectral region of low nonlinear losses. Using white light interferometry we extract the chromatic dispersion of our waveguide from 1950 to 2300 nm. Moreover we demonstrate tuning of the zero dispersion wavelength over more than 100 nm, pushing it to longer wavelength by partially underetching the waveguide. © 2014 Optical Society of America.

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