Ultraviolet-enhanced supercontinuum generation in tapered photonic
crystal fiber
S. P. Stark,
A. Podlipensky,
N. Y. Joly,
P. St. J. Russell
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
27
(3)
592-598
(2010)
We investigate numerically and experimentally the propagation of visible sub-50 fs pulses in a tapered small core photonic crystal fiber. The fiber has anomalous dispersion between two closely spaced zero dispersion wavelengths at 509 and 640 nm, and the excitation wavelength was varied within this range. We find that the spectral evolution in the low power regime is dominated by higher-order soliton fission, soliton self-frequency shift, and dispersive wave generation. At higher powers, extremely wide spectral broadening of the input pulse occurs within the first few millimeters of fiber. The wavelength conversion into the blue and red spectral ranges is studied as a function of the input power and excitation wavelength. Conversions into the spectral range 300-470 nm at efficiencies as high as 40% are observed when pumping at 523 nm. (C) 2010 Optical Society of America
Bridging visible and telecom wavelengths with a single-mode broadband
photon pair source
C. Soeller,
B. Brecht,
P. J. Mosley,
L. Y. Zang,
A. Podlipensky,
N. Y. Joly,
P. St. J. Russell,
C. Silberhorn
We present a spectrally decorrelated photon pair source bridging the visible and telecom wavelength regions. Tailored design and fabrication of a solid-core photonic crystal fiber (PCF) lead to the emission of signal and idler photons into only a single spectral and spatial mode. Thus no narrowband filtering is necessary and the heralded generation of pure photon number states in ultrafast wave packets at telecom wavelengths becomes possible.
Plasmon resonances on gold nanowires directly drawn in a step-index
fiber
H. K. Tyagi,
H. W. Lee,
P. Uebel,
M. A. Schmidt,
N. Joly,
M. Scharrer,
P. St. J. Russell
OPTICS LETTERS
35
(15)
2573-2575
(2010)
We report the successful production of high-quality gold wires, with diameters down to 260 nm, by direct fiber drawing from a gold-filled fused-silica cane. The stack-and-draw technique makes it straightforward to incorporate a conventional step-index core, adjacent to the gold wire, in the cane. In the drawn fiber, strong coupling of light from the glass core to SPP resonances on the gold wire is observed at specific well-defined wavelengths. Such embedded wires have many potential applications, for example, as nanoscale electrodes, in nonlinear optical plasmonics, and as near-field scanning optical microscope tips. (C) 2010 Optical Society of America
Pressure-controlled phase matching to third harmonic in Ar-filled
hollow-core photonic crystal fiber
J. Nold,
P. Hoelzer,
N. Y. Joly,
G. K. L. Wong,
A. Nazarkin,
A. Podlipensky,
M. Scharrer,
P. St J. Russell
OPTICS LETTERS
35
(17)
2922-2924
(2010)
We report tunable third-harmonic generation (THG) in an Ar-filled hollow-core photonic crystal fiber, pumped by broadband < 2 mu J, 30 fs pulses from an amplified Ti:sapphire laser system. The overall dispersion is precisely controlled by balancing the negative dielectric susceptibility of the waveguide against the positive susceptibility of the gas. We demonstrate THG to a higher-order guided mode and show that the phase-matched UV wavelength is tunable by adjusting the gas pressure. (C) 2010 Optical Society of America
Contact
Research Group Nicolas Joly
Professor for Photonics Friedrich-Alexander-Universität Erlangen-Nürnberg
and
Max Planck Institute for the Science of Light Staudtstr. 2 91058 Erlangen, Germany
