Optics Letters

Locking the carrier-envelope-offset frequency of an optical parametric oscillator without f–2f self-referencing

Teresa I. Ferreiro, Jinghua Sun, Derryck T. Reid
The carrier-envelope-offset (CEO) frequency of pulses from a femtosecond optical parametric oscillator (OPO) was stabilized for 30?min without the need for f–2f self-referencing in either the OPO or its pump laser. Interference between the high-frequency modes of the pump supercontinuum and ... [Opt. Lett. 35, 1668-1670 (2010)]

Polarization diffraction grating produced by femtosecond laser nanostructuring in glass

Martynas Beresna, Peter G. Kazansky
We demonstrate a polarization-sensitive diffractive optical element by femtosecond laser direct writing of light-induced self-assembled nano-gratings in bulk silica glass. Manipulation of the induced form birefringence is achieved by controlling the writing parameters, in particular, the ... [Opt. Lett. 35, 1662-1664 (2010)]

Millijoule-class Yb-doped pulsed fiber laser operating at 977?nm

Johan Boullet, Romain Dubrasquet, Capucine Médina, Ramatou Bello-Doua, Nicholas Traynor, Eric Cormier
We report what we believe to be the first millijoule-class ytterbium-doped fiber laser system operating on the zero-phonon line at 977?nm. An actively Q-switched master fiber oscillator delivers nanosecond pulses (FWHM 12–32?ns) at adjustable multiples of 10?kHz repetition rates that are ... [Opt. Lett. 35, 1650-1652 (2010)]

Enhancement of electric oxygen-iodine laser performance using larger mode volume resonators

Brian S. Woodard, Gabriel F. Benavides, Joseph W. Zimmerman, David L. Carroll, Andrew D. Palla, Michael T. Day, Joseph T. Verdeyen, Wayne C. Solomon
Herein the authors report on the demonstration of an 87% enhancement in cw laser power on the 1315 nm transition of atomic iodine via a 100% increase in the resonator mode volume. O_2(a^1Δ) is produced by a single rf-excited electric discharge sustained in an O_2–He–NO gas ... [Opt. Lett. 35, 1611-1613 (2010)]

Enhancing performances of a passively Q-switched Nd:YAG∕Cr^4+:YAG microlaser with a volume Bragg grating output coupler

N. Pavel, M. Tsunekane, T. Taira
A diode end-pumped Nd:YAG microlaser passively Q-switched by Cr^4+:YAG with performances controlled by a volume Bragg grating (VBG) output coupler has been developed. Compared with operation at room temperature, the Q-switched laser pulse energy was increased, by a factor of 2 or more, by elevating ... [Opt. Lett. 35, 1617-1619 (2010)]

High-energy 13.9?nm table-top soft-x-ray laser at 2.5?Hz repetition rate excited by a slab-pumped Ti:sapphire laser

D. H. Martz, D. Alessi, B. M. Luther, Y. Wang, D. Kemp, M. Berrill, J. J. Rocca
We have demonstrated repetitive operation of a table-top λ=13.9?nm Ni-like Ag soft-x-ray laser that generates laser pulses with 10?μJ energy. The soft-x-ray laser is enabled by a Ti:sapphire laser pumped by high-repetition-rate frequency-doubled high-energy Nd:glass slab amplifiers. ... [Opt. Lett. 35, 1632-1634 (2010)]

Picosecond pulses of variable duration from a high-power passively mode-locked Nd:YVO_4 laser free of spatial hole burning

Marie-Christine Nadeau, Stéphane Petit, Philippe Balcou, Romain Czarny, Sébastien Montant, Christophe Simon-Boisson
We report on a high-power passively mode-locked TEM_00Nd:YVO_4 oscillator, 888?nm diode-pumped, with pulse durations adjustable between 46?ps and 12?ps. The duration tunability was obtained by varying the output coupler (OC) transmission while avoiding resorting to spatial hole burning (SHB) for ... [Opt. Lett. 35, 1644-1646 (2010)]

Point-by-point fiber Bragg grating inscription in free-standing step-index and photonic crystal fibers using near-IR femtosecond laser

Thomas Geernaert, Kyriacos Kalli, Charalambos Koutsides, Michael Komodromos, Tomasz Nasilowski, Waclaw Urbanczyk, Jan Wojcik, Francis Berghmans, Hugo Thienpont
We report what we believe to be the first highly symmetric first-order IR femtosecond laser fiber Bragg gratings within the telecommunications C band in free-standing optical fiber, fabricated with a relatively low NA lens and without use of oil immersion techniques. This grating features the ... [Opt. Lett. 35, 1647-1649 (2010)]

Tunable high-power narrow-spectrum external-cavity diode laser based on tapered amplifier at 668?nm

Mingjun Chi, G. Erbert, B. Sumpf, Paul Michael Petersen
A 668?nm tunable high-power narrow-spectrum diode laser system based on a tapered semiconductor optical amplifier in external cavity is demonstrated. The laser system is tunable from 659to675?nm. As high as 1.38?W output power is obtained at 668.35?nm. The emission spectral bandwidth is less than ... [Opt. Lett. 35, 1545-1547 (2010)]

Intensity-dependent reversal of nonlinearity sign in a gold nanoparticle array

Kai Wang, Hua Long, Ming Fu, Guang Yang, Peixiang Lu
The optical nonlinearities of a Au nanoparticle array were determined by performing Z-scan measurements with a femtosecond laser (800?nm, 50?fs). As the exciting energy increased, the nonlinear absorption of the Au nanoparticle array changed from reverse-saturable absorption to saturable ... [Opt. Lett. 35, 1560-1562 (2010)]

Syndicate content