Virtual Journal of Laser

Zhang Luo, Xiaodong Yuan, Zhihong Zhu, Ken Liu, Weimin Ye, Chun Zeng, Jiarong Ji
In this Letter, the beat frequency at rest of a ring laser gyroscope with nonlinear effects is discussed in detail. Even without an additional intensity-stabilizing system, the random nullshift bias induced by the Kerr effect is compensated by the phase shift associated with the stimulated ... [Opt. Lett. 38, 1152-1154 (2013)]

Alessio Gambetta, Nicola Coluccelli, Marco Cassinerio, Davide Gatti, Paolo Laporta, Gianluca Galzerano, Marco Marangoni
We report on the generation of mid-infrared (mid-IR) pulses with a maximum average optical power of 4 mW and wide tunability in the 8–14 μm range via difference frequency generation (DFG) in GaSe from an Er:fiber laser oscillator. The DFG process is seeded with self-frequency ... [Opt. Lett. 38, 1155-1157 (2013)]

Hua Luo, Kai Li, Dongfang Zhang, Tianyou Gao, Kaijun Jiang
We have experimentally studied multiple side-band generation for two-frequency components injected into a tapered amplifier (TA) and demonstrated its effects on atomic laser cooling. A heterodyne frequency-beat measurement and a Fabry–Perot interferometer have been applied to analyze the ... [Opt. Lett. 38, 1161-1163 (2013)]

Amol Choudhary, Pradeesh Kannan, Jacob I. Mackenzie, Xian Feng, David P. Shepherd
Continuous wave laser action around 1.9 μm has been demonstrated in a Tm^3+-doped germanate glass channel waveguide laser fabricated by ion-exchange. Laser action was observed with an absorbed power threshold of only 44 mW and a slope efficiency of up to 6.8% was achieved. ... [Opt. Lett. 38, 1146-1148 (2013)]

Hou-Ren Chen, Kuei-Huei Lin, Chih-Ya Tsai, Hsiao-Hua Wu, Chih-Hsuan Wu, Chieh-Han Chen, Yu-Chieh Chi, Gong-Ru Lin, Wen-Feng Hsieh
We report the generation of passively harmonic mode-locked pulses using a 1.06 μm semiconductor optical amplifier (SOA) in a figure-eight laser configuration operated in the all-normal-dispersion regime. Different orders of harmonic mode-locking can be obtained from 30 MHz to ... [Opt. Lett. 38, 845-847 (2013)]

Yifeng Yang, Man Hu, Bing He, Jun Zhou, Houkang Liu, Shoujun Dai, Yunrong Wei, Qihong Lou
An injection-locked fiber laser is introduced to the passive fiber laser coherent beam combination with all-optical feedback loop. A coherent beam combining system with two-dimensional four Yb-doped fiber amplifier chains is established, and the injection-locked fiber laser works as a switchable ... [Opt. Lett. 38, 854-856 (2013)]

Krzysztof M. Nowak, Takeshi Ohta, Takashi Suganuma, Junichi Fujimoto, Hakaru Mizoguchi
In this Letter we describe in more detail a solid-state seeded, nanosecond pulse, multiline CO_2 oscillator designed and built for the extreme ultraviolet (EUV) laser-produced-plasma (LPP) source. Our oscillator featured quantum cascade laser seeders, a diffraction-type seed beam combiner, and a ... [Opt. Lett. 38, 881-883 (2013)]

Thibault North, Martin Rochette
Dual-wavelength noiselike pulses are generated in a fiber ring laser. A first series of pulses is induced at a wavelength of 1550 nm by the interplay of an erbium-doped fiber and nonlinear polarization rotation. From the Raman gain of these pump pulses emerges a second series of Stokes pulses ... [Opt. Lett. 38, 890-892 (2013)]

Lee W. Casperson, Adam Dittli, Tsing-Hua Her
Thermal refraction focusing in planar index-antiguided lasers is investigated both theoretically and experimentally. An analytical model based on zero-field approximation is presented for treating the combined effects of index antiguiding and thermal focusing. At very low pumping power, the mode is ... [Opt. Lett. 38, 929-931 (2013)]

Adrien Aubourg, Julien Didierjean, Nicolas Aubry, François Balembois, Patrick Georges
We demonstrated laser operation of a passively Q-switched diode-pumped Er:YAG solid-state laser emitting at 1645 or 1617 nm depending on the initial transmission of the Cr:ZnSe saturable absorber. The crystal emitted up to 10 W at 1645 nm and up to 8 W at 1617 nm in CW mode ... [Opt. Lett. 38, 938-940 (2013)]