-
10 GHz femtosecond pulse interleaver in planar waveguide technology
Michelle Y. Sander, Sergey Frolov, Joseph Shmulovich, Erich P. Ippen, Franz X. Kärtner
Coherent pulse interleaving implemented in planar waveguide technology is presented as a compact and robust solution to generate high repetition rate frequency combs. We demonstrate a 10 GHz pulse train from an Er-doped femtosecond fiber laser that is coupled into waveguide interleavers and ... [Opt. Express 20, 4102-4113 (2012)]
-
D-Scan measurement of ablation threshold incubation effects for ultrashort laser pulses
Leandro Matiolli Machado, Ricardo Elgul Samad, Wagner de Rossi, Nilson Dias Vieira Junior
We report the validation of the Diagonal Scan (D-Scan) technique to determine the incubation parameter for ultrashort laser pulses ablation. A theory to calculate the laser pulses superposition and a procedure for quantifying incubation effects are described, and the results obtained for BK7 ... [Opt. Express 20, 4114-4123 (2012)]
-
Near-field probing of slow Bloch modes on photonic crystals with a nanoantenna
T-P. Vo, M. Mivelle, S. Callard, A. Rahmani, F. Baida, D. Charraut, A. Belarouci, D. Nedeljkovic, C. Seassal, G.W. Burr, T. Grosjean
We study the near-field probing of the slow Bloch laser mode of a photonic crystal by a bowtie nano-aperture (BNA) positioned at the end of a metal-coated fiber probe. We show that the BNA acts as a polarizing nanoprobe allowing us to extract information about the polarization of the near-field of ... [Opt. Express 20, 4124-4135 (2012)]
-
VECSEL gain characterization
Mario Mangold, Valentin J. Wittwer, Oliver D. Sieber, Martin Hoffmann, Igor L. Krestnikov, Daniil A. Livshits, Matthias Golling, Thomas Südmeyer, Ursula Keller
We present the first full gain characterization of two vertical external cavity surface emitting laser (VECSEL) gain chips with similar designs operating in the 960-nm wavelength regime. We optically pump the structures with continuous-wave (cw) 808-nm radiation and measure the nonlinear ... [Opt. Express 20, 4136-4148 (2012)]
-
Femtosecond free-electron laser x-ray diffraction data sets for algorithm development
Stephan Kassemeyer, Jan Steinbrener, Lukas Lomb, Elisabeth Hartmann, Andrew Aquila, Anton Barty, Andrew V. Martin, Christina Y. Hampton, Sa?a Bajt, Miriam Barthelmess, Thomas R.M. Barends, Christoph Bostedt, Mario Bott, John D. Bozek, Nicola Coppola, Max Cryle, Daniel P. DePonte, R. Bruce Doak, Sascha W. Epp, Benjamin Erk, Holger Fleckenstein, Lutz Foucar, Heinz Graafsma, Lars Gumprecht, Andreas Hartmann, Robert Hartmann, Günter Hauser, Helmut Hirsemann, André Hömke, Peter Holl, Olof Jönsson, Nils Kimmel, Faton Krasniqi, Mengning Liang, Filipe R.N.C. Maia, Stefano Marchesini, Karol Nass, Christian Reich, Daniel Rolles, Benedikt Rudek, Artem Rudenko, Carlo Schmidt, Joachim Schulz, Robert L. Shoeman, Raymond G. Sierra, Heike Soltau, John C. H. Spence, Dmitri Starodub, Francesco Stellato, Stephan Stern, Gunter Stier, Martin Svenda, Georg Weidenspointner, Uwe Weierstall, Thomas A. White, Cornelia Wunderer, Matthias Frank, Henry N. Chapman, Joachim Ullrich, Lothar Strüder, Michael J. Bogan, Ilme Schlichting
We describe femtosecond X-ray diffraction data sets of viruses and nanoparticles collected at the Linac Coherent Light Source. The data establish the first large benchmark data sets for coherent diffraction methods freely available to the public, to bolster the development of algorithms that are ... [Opt. Express 20, 4149-4158 (2012)]
-
Optoacoustic monitoring of cerebral venous blood oxygenation though intact scalp in large animals
I. Y. Petrov, Y. Petrov, D. S. Prough, I. Cicenaite, D. J. Deyo, R. O. Esenaliev
Monitoring (currently invasive) of cerebral venous blood oxygenation is a key to avoiding hypoxia-induced brain injury resulting in death or severe disability. Noninvasive, optoacoustic monitoring of cerebral venous blood oxygenation can potentially replace existing invasive methods. To the best of ... [Opt. Express 20, 4159-4167 (2012)]
-
Array of tapered semiconductor waveguides in a fiber for infrared image transfer and magnification
M. Krishnamurthi, J. R. Sparks, R. He, I. A. Temnykh, N. F. Baril, Z. Liu, P. J. A. Sazio, J. V. Badding, V. Gopalan
The proof-of-concept of an infrared imaging tip by an array of infrared waveguides tapered as small as 2 ?m is demonstrated. The fabrication is based on a high-pressure chemical fluid deposition technique to deposit precisely defined periodic arrays of Ge and Si waveguides within a ... [Opt. Express 20, 4168-4175 (2012)]
-
Modified field enhancement and extinction by plasmonic nanowire dimers due to nonlocal response
Giuseppe Toscano, Søren Raza, Antti-Pekka Jauho, N. Asger Mortensen, Martijn Wubs
We study the effect of nonlocal optical response on the optical properties of metallic nanowires, by numerically implementing the hydrodynamical Drude model for arbitrary nanowire geometries. We first demonstrate the accuracy of our frequency-domain finite-element implementation by benchmarking it ... [Opt. Express 20, 4176-4188 (2012)]
-
Framework for computing the spatial coherence effects of polycapillary x-ray optics
Adam M. Zysk, Robert W. Schoonover, Qiaofeng Xu, Mark A. Anastasio
Despite the extensive use of polycapillary x-ray optics for focusing and collimating applications, there remains a significant need for characterization of the coherence properties of the output wavefield. In this work, we present the first quantitative computational method for calculation of the ... [Opt. Express 20, 3975-3982 (2012)]
-
Room-temperature operation of npn- AlGaInAs/InP multiple quantum well transistor laser emitting at 1.3-µm wavelength
Mizuki Shirao, Takashi Sato, Noriaki Sato, Nobuhiko Nishiyama, Shigehisa Arai
Room-temperature pulsed operation of a 1.3-µm wavelength transistor laser (TL), consisting of a buried heterostructure (BH) with an npn configuration and an AlGaInAs/InP multiple-quantum-well (MQW) active region, was successfully attained. A threshold base current of 18 mA (threshold emitter ... [Opt. Express 20, 3983-3989 (2012)]
|
