Integrated optical auto-correlator based on third-harmonic generation in a silicon photonic crystal waveguide.
The ability to use coherent light for material science and applications is linked to our ability to measure short optical pulses. While free-space optical methods are well established, achieving this on a chip would offer the greatest benefit in footprint, performance and cost, and allow the integration with complementary signal-processing devices. A key goal is to achieve operation at sub-watt peak power levels and on sub-picosecond timescales. Previous integrated demonstrations require either a temporally synchronized reference pulse, an off-chip spectrometer or long tunable delay lines. Here we report a device capable of achieving single-shot time-domain measurements of near-infrared picosecond pulses based on an ultra-compact integrated CMOS-compatible device, which could operate without any external instrumentation. It relies on optical third-harmonic generation in a slow-light silicon waveguide. Our method can also serve as an in situ diagnostic tool to map, at visible wavelengths, the propagation dynamics of near-infrared pulses in photonic crystals.
1] Université de Lyon, Institut des Nanotechnologies de Lyon (INL) UMR 5270, Ecole Centrale de Lyon, 69130 Ecully, France [2] CUDOS, Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, New South Wales 2006, Australia.
Christelle
C
Monat
1] Université de Lyon, Institut des Nanotechnologies de Lyon (INL) UMR 5270, Ecole Centrale de Lyon, 69130 Ecully, France [2] CUDOS, Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, New South Wales 2006, Australia.
Christian
C
Grillet
CUDOS, Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, New South Wales 2006, Australia.
Matthew
M
Collins
CUDOS, Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, New South Wales 2006, Australia.
Alex
A
Clark
CUDOS, Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, New South Wales 2006, Australia.
Jochen
J
Schroeder
CUDOS, Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, New South Wales 2006, Australia.
Chunle
C
Xiong
1] School of Physics and Astronomy, University of St Andrews, St Andrews, Fife KY16 9SS, UK [2].
Juntao
J
Li
School of Physics and Astronomy, University of St Andrews, St Andrews, Fife KY16 9SS, UK.
Liam
L
O'Faolain
1] School of Physics and Astronomy, University of St Andrews, St Andrews, Fife KY16 9SS, UK [2].
Thomas F
TF
Krauss
CUDOS, Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, New South Wales 2006, Australia.
Benjamin J
BJ
Eggleton
1] CUDOS, Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, New South Wales 2006, Australia [2].
David J
DJ
Moss