We demonstrate that fiber-based frequency combs with multi-branch configurations can transfer both linewidth and stability to another wavelength at the millihertz level. An intra-cavity electro-optic modulator is employed obtain a broad servo bandwidth for repetition rate control. investigate relative linewidths between two using stable continuous-wave laser as common reference stabilize frequencies in combs. The achieved energy concentration carrier of out-of-loop beat was 99% 30% 1 kHz 7.6...

The dispersion relation of photons transmitting through a photonic one-dimensional quasicrystal arranged in Fibonacci sequence was observed by measuring the spectrum phase change transmitted light using Michelson-type interferometer. obtained clearly showed self-similar structure characteristic to curves lattices.

Improving the efficiency of lasers without complex structures, expensive elements, and precise optimization will lead to cost reductions increased practicality. Here, it is first shown theoretically that dependence optical-to-optical conversion on minimum laser spot radii for a Yb:YAG with simple structure decreases extremely increasing pump intensity efficiency. Not only optimum range highest wide, but even if are doubled, by few percentage points or less at maximum 450 kW/cm2. Therefore,...

Improving the efficiency of lasers without complex structures, expensive elements, and precise optimization will lead to cost reductions increased practicality. Here, it is first shown theoretically that dependence optical-to-optical conversion on laser beam waist (minimum spot) radii for a Yb:YAG with simple structure decreases extremely increasing pump intensity efficiency. Not only optimum range highest wide, but even if are doubled, by few percentage points or less at maximum 450 kW/cm2....

C 60 vapor was irradiated with an intense femtosecond laser pulse (1×1016 W/cm2 in 120 fs at a wavelength of 800 nm). Multiply charged carbon ions, up to C4+, were detected the time-of-flight spectra. We have measured both energy and angular distributions respect polarization direction for ions different charge number. The kinetic are distributed above 1 keV. distribution measurement shows that highly C3+ C4+ mostly directions parallel polarization, C+ slightly perpendicular it. These...

A diode pumped Yb:YAG regenerative amplifier has been developed for short pulse generation. High gain and efficient cooling characteristics were achieved in the laser module using a thin square-rod structure. Average output power of 10 W was realized at repetition rate 100 kHz with 6.2 ps width.

Highly efficient continuous-wave laser oscillation in Yb:YAG microchip crystal has been realized at room temperature by high intensity Ti:sapphire pumping. The maximum output power of 810 mW was obtained 1048 nm wavelength oscillation. optical-to-optical efficiency 81% for the incident pump and 85% absorbed power. These efficiencies are close to quantum-defect-limit 90%.

Fluoride glass known as ZBLAN is well for high transparency in the infrared region and a promising candidate host material lasers.Furthermore, low dispersion of glasses around 2-μm wavelength suggests usefulness fibers developing ultrafast fiber lasers.Based on these considerations, we have conducted detailed study ultrashort laser oscillators based thulium-doped fibers.Two types diode-pumped, modelocked are demonstrated using single-mode double-clad fibers.The oscillator with singlemode...

Linear propagation of light was investigated by using a white-light Michelson interferometer. This method gives the full information on deformation broadband optical pulses passage through samples in linear regime. We observed delay pulse for cobalt chloride pyridine, free-induction decay signal oxazine 1 methanol, and increase peak velocity nigrosine water. By Fourier analysis interferograms, complex constants were also obtained.

A high-efficiency and high-power Yb:Y3Al5O12 oscillator was developed based on the microthickness slab structure with high aspect ratio to obtain one-dimensional temperature gradient reduce increase in crystal. Laser output power of 257W obtained cw oscillation 42% optical conversion efficiency at a pump 608W.

Femtosecond free induction decay of cobalt–phthalocyanine in pyridine and octaethyl porphine was observed by use a white-light interferometer with resolution time 6 fs. Also, frequency-domain complex optical constants the samples were obtained Fourier-transform analysis phase-sensitive interferograms.

By pumping a brewster-cut Ti:sapphire crystal from both sides with frequency-doubled Nd:YAG laser at 6J/cm2 we achieved single pass gain of 20dB. This allows to amplify pulses the nano-Joule milli-Joule level triple-pass amplifier > 60dB gain. An output energy up 3.5mJ was measured, depending on input oscillator/stretcher front end. The used in chirped-pulse amplification terawatt system. We discuss advantages this approach, e.g. for very short and amplified spontaneous emission.

Two kinds of multiple-light-scattering measurements were performed for porous glass plates several pore radii from 0.15 to 0.50 \ensuremath{\mu}m. One is the measurement angular dependence backscattered light intensity, and other temporal profile pulses transmitted through sample. The measured curves in very good agreement with theoretical ones based on diffusion model uniform scattering media, no features specific local geometry found. radius transport mean free path...

An end-pumped thin rod Yb:YAG laser amplifier architecture is proposed for high-power and efficient pulse amplification of quasi-four-level lasers. A long with low ion concentration used optimum conditions the crystal properties are discussed high-repetition-rate pulses. high single-pass gain expected thermal birefringence loss significantly smaller than gain. From these results, optical conversion efficiency more 50% in master-oscillator power-amplifier (MOPA) system.

A high-average-power, laser-diode-pumped, picosecond-pulse regenerative amplifier was developed using the thin-rod Yb:YAG (yttrium aluminum garnet) laser architecture. This architecture has a complete set of favorable properties for cost-effective, and high-peak-power lasers. These include low amplified spontaneous emission with high gain repetition rate. For system, an average output power 20 W achieved at pulse rate 100 kHz, which corresponds to energy 200 μJ width 2 ps.

Nonlinear ultrashort pulse propagation in a mode-locked Yb:YAG laser with highly nonlinear intra-cavity medium is analyzed using Schrodinger equation. The output spectra are extended by the increased intensity, and spectral bandwidths wider than those of gain achieved. Moreover, widths shortened intensity to considerably less medium. simulation results qualitatively agree experimental results.

Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text S. Matsubara, K. Uno, Y. Nakajima, Kawato, T. Kobayashi, and A. Shirakawa, "Extremely low quantum defect oscillation of Ytterbium fiber laser by diode pumping at room temperature," in Advanced Solid-State Photonics, OSA Technical Digest Series (CD) (Optica Publishing Group, 2007), paper TuB4. Export BibTex Endnote (RIS) HTML Plain alert Save article

Despite the importance of improving efficiency lasers in order to expand their utility range, improvement Ti:sapphire has not progressed due high crystal losses. Therefore, we improved CW by high-intensity pumping, which is one most effective methods suppressing reduction Using a easily commercially available 0.25 wt.%, figure merit (FOM) 200 crystal, optics and pump source, achieved an optical-to-optical conversion 32.4% with slope 42.5% at incident power 5.0 W corresponds maximum pumping...

Highly efficent 1031-nm cw laser oscillation of Yb:YAG crystal has been realized at room temperature with the slope efficiency 140 % and optical-to-optical 89 for absorbed pump power.

One-hundred-ten-fs and 72-fs pulse-widths were obtained directly from a low-brightness-laser-diode-pumped, mode-locked Yb:YAG laser with SESAM without SESAM, respectively. The laser-spectrum-center the fluorescence-center almost same. laser-spectra much broader than fluorescence.

Efficient broadband spectrum oscillation was obtained directly from a laser-diode-pumped Kerr-lens mode-locked Yb:YAG laser with intracavity nonlinear media. The expanded to around 1040 nm 1070 nm. is much broader than the fluorescence at 1050