Virtual Journal of Laser

I. Liontos, S. Cavalieri, C. Corsi, R. Eramo, S. Kaziannis, A. Pirri, E. Sali, M. Bellini
We report the experimental measurement of Ramsey interference fringes in the single-photon excitation to a high-lying bound state of atomic argon by pairs of phase-locked, time-delayed, extreme UV high-order-harmonic pulses at 87 nm. High-visibility Ramsey fringes are observed for delays larger ... [Opt. Lett. 35, 832-834 (2010)]

Krassimir Panajotov, Maciej Dems
By calculating the band diagrams for the distributed Bragg mirrors of vertical-cavity surface-emitting lasers (VCSELs) with triangular two-dimensional lattice of etched holes we show that true photonic bandgap (PBG) confinement is possible for TE-like polarized light. We confirm this true PBG ... [Opt. Lett. 35, 829-831 (2010)]

Chien-Chung Tsai, Ting-Hao Chen, Yen-Sheng Lin, Yu-Ta Wang, Wei Chang, Kuang-Yu Hsu, Yung-Hsin Chang, Po-Kai Hsu, Dong-Yo Jheng, Kuang-Yao Huang, Edmund Sun, Sheng-Lung Huang
A Ce^3+:YAG double-clad crystal fiber (DCF) visible emission was used as the light source for optical coherence tomography (OCT). The visible emission was produced from a 10 μm core DCF pumped by a diode laser. The broadband emission and short central wavelength of this light source enabled ... [Opt. Lett. 35, 811-813 (2010)]

Russell Kliese, Yah Leng Lim, Thierry Bosch, Aleksandar D. Rakić
The self-mixing (SM) laser sensing technique allows for a simple, self-aligned, and robust system for measuring velocity. Low-cost blue emitting GaN laser diodes have recently become available owing to the high volume requirements for Blu-ray Disc devices such as high-definition video players and ... [Opt. Lett. 35, 814-816 (2010)]

Shogo Yamazoe, Masaki Katou, Takashi Adachi, Tadashi Kasamatsu
We report a palm-top-size femtosecond diode-pumped mode-locked Yb^+3:KY(WO_4)_2 solid-state laser with a semiconductor saturable absorber mirror utilizing soliton mode locking for shortening the cavity to 50 mm. An average output power of 680 mW and a pulse width of 162 fs were obtained at 1045 nm ... [Opt. Lett. 35, 748-750 (2010)]

Yanhua Luo, Qijin Zhang, Huiyong Liu, Gang-Ding Peng
We report writing polymer optical fiber (POF) gratings in photosensitive POFs doped with benzildimethylketal (BDK) (BPOF in short) using a 355 nm laser for what we believe to be the first time. Both multimode and single-mode FBGs were fabricated with relatively low writing intensity. The enhanced ... [Opt. Lett. 35, 751-753 (2010)]

Z. H. Zhu, H. Liu, S. M. Wang, W. M. Ye, X. D. Yuan, S. N. Zhu
This work investigates a kind of metallic magnetic cavity based on slit-hole resonators. Two orthogonal hybrid magnetic resonance modes of the cavity with a large spatial overlap are predesigned at the wavelengths of 980 and 1550 nm. The Yb:Er codoped material serving as a gain medium is set in the ... [Opt. Lett. 35, 754-756 (2010)]

M. Plewicki, R. Compton, A. Filin, D. A. Romanov, R. J. Levis
We demonstrate the coherent nature of dynamic Rabi-shifted sidebands arising when a picosecond probe laser interacts with a weakly ionized laser-generated microplasma. The coherence is manifested as spectral fringes observed in the sideband spectra. A model is presented that quantitatively predicts ... [Opt. Lett. 35, 778-780 (2010)]

Jussi Rautiainen, Igor Krestnikov, Mantas Butkus, Edik U. Rafailov, Oleg G. Okhotnikov
We demonstrate an optically pumped semiconductor disk laser using 39 layers of Stranski-Krastanov InGaAs quantum dots self-assembled during epitaxial growth on a monolithic GaAs/AlAs distributed Bragg reflector. The gain structure bonded to an intracavity diamond crystal heat spreader allows 1.75 W ... [Opt. Lett. 35, 694-696 (2010)]

Jifeng Liu, Xiaochen Sun, Rodolfo Camacho-Aguilera, Lionel C. Kimerling, Jurgen Michel
Monolithic lasers on Si are ideal for high-volume and large-scale electronic-photonic integration. Ge is an interesting candidate owing to its pseudodirect gap properties and compatibility with Si complementary metal oxide semiconductor technology. Recently we have demonstrated room-temperature ... [Opt. Lett. 35, 679-681 (2010)]