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Laser ceramic materials for subpicosecond solid-state lasers using Nd^3+-doped mixed scandium garnets
Hajime Okada, Momoko Tanaka, Hiromitsu Kiriyama, Yoshiki Nakai, Yoshihiro Ochi, Akira Sugiyama, Hiroyuki Daido, Toyoaki Kimura, Takagimi Yanagitani, Hideki Yagi, Noriyuki Meichin
We have successfully developed and demonstrated broadband emission Nd-doped mixed scandium garnets based on laser ceramic technology. The inhomogeneous broadening of Nd^3+ fluorescence lines results in a bandwidth above 5nm that is significantly broader than that for Nd:YAG and enables ... [Opt. Lett. 35, 3048-3050 (2010)]
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Dysprosium-doped PbGa_2S_4 laser excited by diode-pumped Nd:YAG laser
Jan ?ulc, Helena Jel?ov?Maxim E. Doroshenko, Tasoltan T. Basiev, Vyacheslav V. Osiko, Valerii V. Badikov, Dmitrii V. Badikov
We realized a compact mid-IR room temperature operating Dy^3+:PbGa_2S_4 laser, excited by a diode-pumped Nd:YAG laser at a wavelength of 1318nm. The pumping laser was operating in pulsed mode with a pulse length of 4ms and repetition rate of 20Hz. Maximum pumping energy at a wavelength of 1318nm ... [Opt. Lett. 35, 3051-3053 (2010)]
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Accurate retrieval algorithm of amplitude from radial-shearing interferogram
Da-Hai Li, Xiao-Ping Qi, Qiong-Hua Wang, Xiao-Yong Liu, Guo-Ying Feng, Shou-Huan Zhou
We propose a mathematic formula that can be applied to work out the amplitude distribution of a tested laser beam from its radial-shearing interferogram accurately, even if the amplitude distribution is extremely uneven. Provided that the background irradiance distribution of a tested beam is ... [Opt. Lett. 35, 3054-3056 (2010)]
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Waveguide dispersion effects in silicon-on-insulator coupled-resonator optical waveguides
Michael L. Cooper, Greeshma Gupta, Mark A. Schneider, William M. J. Green, Solomon Assefa, Fengnian Xia, Dawn K. Gifford, Shayan Mookherjea
The dispersion of the waveguides that constitute microring resonators can considerably affect the dispersion characteristics of coupled-resonator optical waveguides (CROWs). We derive expressions for CROW dispersion and group delay for silicon-on-insulator microring CROWs, showing both ... [Opt. Lett. 35, 3030-3032 (2010)]
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Master mode-locking theory for few-femtosecond pulses
Edward D. Farnum, J. Nathan Kutz
We propose a model that is valid for ultrafast pulse propagation in a mode-locked laser cavity in the few-femtosecond pulse regime, thus deriving the equivalent of the master mode-locking equation for ultrashort pulses that has dominated mode-locking theory for two decades. The short-pulse equation ... [Opt. Lett. 35, 3033-3035 (2010)]
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LIFT: a focal-plane wavefront sensor for real-time low-order sensing on faint sources
Serge Meimon, Thierry Fusco, Laurent M. Mugnier
We propose the linearized focal-plane technique (LIFT) and compare it to classical sensors, such as the quad-cell wavefront sensor (WFS), pyramid WFS, and Shack?Hartmann WFS. The number of modes sensed by LIFT can be tuned without any hardware modification nor degradation of low-order ... [Opt. Lett. 35, 3036-3038 (2010)]
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Microsecond switching of parametric tunable dispersion compensator
Ken Tanizawa, Junya Kurumida, Hiroo Ishida, Yoichi Oikawa, Noriyasu Shiga, Masanori Takahashi, Takeshi Yagi, Shu Namiki
A record-fast, 2?s switching operation of an optical tunable dispersion compensator is demonstrated with a parametric tunable dispersion compensation scheme. We alternately switch two optical paths having different net dispersions with a microsecond guard interval of the compensator response ... [Opt. Lett. 35, 3039-3041 (2010)]
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Bit-rate-variable and order-switchable optical multiplexing of high-speed pseudorandom bit sequence using optical delays
Xiaoxia Wu, Jian Wang, Omer F. Yilmaz, Scott R. Nuccio, Antonella Bogoni, Alan E. Willner
We experimentally demonstrate high-speed optical pseudorandom bit sequence (PRBS) multiplexing with coarse and fine bit-rate tuning capability and a switchable order using optical delays. Data multiplexing of 80Gbit/s and 160Gbit/s is shown, each with a tunable rate using a ... [Opt. Lett. 35, 3042-3044 (2010)]
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Optical fiber microwire current sensor
M. Belal, Z. Song, Y. Jung, G. Brambilla, T. P. Newson
We demonstrate a compact optical fiber microwire current sensor based on the Faraday effect with gigahertz frequency of current sensing capabilities. [Opt. Lett. 35, 3045-3047 (2010)]
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80 W, 120 fs Yb-fiber frequency comb
Axel Ruehl, Andrius Marcinkevicius, Martin E. Fermann, Ingmar Hartl
We report on a high-power fiber frequency comb exhibiting linear chirped-pulse amplification up to 80W and generating 120fs pulses. By proper matching of the group delay between the fiber stretcher and compressor, a compression ratio of 3100 could be achieved. Carrier envelope offset ... [Opt. Lett. 35, 3015-3017 (2010)]
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