We demonstrate an 806 nm laser diode end-pumped continuous-wave (CW) and actively Q-switched (AQS) orthogonally-polarized dual-wavelength Nd:YLF operating at 1314 1321 nm. Benefitting from the small difference of stimulated emission cross sections in crystal, power equalized emissions both wavelengths were achieved by simply titling output coupler. A maximum CW 9.2 W was obtained with incident pump 32.5 W, giving optical-to-optical conversion efficiency approximately 28% a slope 33%....

We first demonstrate the laser performance of a compact 2.06 μm Ho: YLF resonantly pumped by broadband fiber-coupled diode. In continuous-wave (CW) operation, maximum output power 1.63 W, corresponding to slope efficiency 89.2%, was obtained with near diffraction-limited beam quality. actively Q-switched pulse energy 1.1 mJ achieved at repetition frequency 100 Hz. The minimum duration 43 ns. in both CW and regimes indicates that current diode in-band has great potential certain conditions...

A theoretical method was proposed to compensate the burst envelope distortion in a solid-state master-oscillator power-amplifier (MOPA) system operating mode at an intra-burst repetition rate of 40 MHz. Arbitrary shapes were achieved inter-burst 100 kHz with pulses burst, showing excellent agreement calculated ones. This is first demonstration arbitrary without adaptive feedback loop laser system. The maximum pulse energy μJ kHz, 10 burst.

In this paper, the theoretical quantitative energy-level character and experimental laser performance of resonantly fiber-coupled diode-pumped Ho <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> : YLiF <sub xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> (Ho: YLF) are first presented. More precise 2.7-level Ho: YLF can be acquired with our analysis. With study, a maximum slope efficiency 88.5%, corresponding to an output power 1.85 W,...

A high repetition rate optical parametric oscillator (OPO) generating an idler laser with a wavelength as long 4.0 μm at 200 and 400 kHz was demonstrated in this paper. The OPO pumped by master power amplifier structure fiber excellent characteristics. pump pulse from the had steep leading edge, which theoretically proved to improve OPO's performance, compared Gaussian pulse. homemade periodically poled magnesium-oxide-doped lithium niobate crystal grating period of 29 employed our...

We demonstrated the active shaping for a solid-state Nd:YVO4 amplifier with high average gain of 39.2 dB. The output power was 8.3 W respect to input 1 mW. A range common and useful pulse shapes generated at final output. In addition, very flat square produced root-mean-square less than 3% in amplitude. numerical method proposed realize without an experimental test amplifier, showing great potential design lasers both peak (>100 kW) desired shape.

The 30 at.% Ho: BaY2F8 crystals were grown by the Czochralski method, and their spectroscopic properties are analyzed systematically standard Judd–Ofelt theory. intensity parameters estimated to be Ω2 = 6.74 × 10−20 cm2, Ω4 1.20 Ω6 0.66 fluorescence branching ratios radiative lifetimes for a series of excited state manifolds also determined. emission cross sections with our measured infrared luminescence spectra, especially important 4.1 μm, calculated about 4.37 10−21 cm2. crystal quality...

An actively Q-switched eye-safe orthogonally-polarized dual-wavelength intracavity Raman laser was demonstrated for the first time, to best of our knowledge. The gain balanced operation at 1314 and 1321 nm within an in-band pumped Nd:YLF realized by slightly titling cavity mirrors. Owing KGW bi-axial properties, two sets simultaneous lasers 1470, 1490 1461, 1499 were achieved simply rotating crystal 90°, respectively. With incident pump power 30 W optimized pulse repetition frequency 5 kHz,...

In this paper, factors influencing the performance of high-gain Nd:YVO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> amplifiers are analyzed and a schematic map relationships between different is given. A model, including pump absorption saturation effect overlap efficiency along beam propagation direction, as well non-radiative decays due to high doping concentration, developed. The laser amplifier studied by changing quality, focal...

In this paper, we compare pulse parameters in two end-pumped passively Q-switched lasers by increasing the boundary temperature of laser crystal. For Nd:YAG/Cr:YAG laser, energy at 1 kHz increased from 12.4 to 21 μJ when 20°C 120°C, while width decreased 1.2 times. Nd:YVO4 using Cr:YAG as saturable absorber, 100 Hz 5.45 24.5 26°C 113°C, 2.4 An improved model based on rate equations was introduced analyze large variation heating

A high-power, high-energy Ho:YAG oscillator resonantly pumped by a Tm-doped fiber laser is presented. maximum continuous output power of 38 W with slope efficiency 51.9% achieved at the wavelength 2.09 μm, and M2≈1.48. In Q-switching regime, pulse energy 12.8 mJ, corresponding to 514.5 kW peak power, obtained repetition frequency 1 kHz. Furthermore, thermal lens effect system studied theoretically, radius transverse electromagnetic (TEM00) mode crystal under different pump powers given.

We present a compact high-power 780 nm frequency-stabilized diode laser with power of as high 2.825 W, corresponding to an estimated overall efficiency 38.5%. The tapered amplifier (TPA) gain was about 24.5 dB, which basically consistent the simulation results. beam quality factor M2<1.72. core feature system stabilizing frequency narrowband semiconductor TPA matured saturated absorption spectrum technique. stabilized against mode hops for period >4200 s fluctuation around 6.7×10-10 within 1...

In this paper, the performance of an end-pumped laser amplifier was experimentally studied by adjusting pumping wavelength a diode. An interesting phenomenon observed: that gain would decrease with increase in absorbed pump power. The scaled output power 0.3 at. % doped 20 mm long Nd:YVO4 crystal decreased from 0.48 to 0.2 W when increased 17.5 17.8 W. Theoretical analysis demonstrated according our previous model. length is main reason for observed phenomenon. This could be utilized enhance...

We first demonstrate the laser performance of a compact 2.06-μm Ho: YLF wing pumped by fiber-coupled diode, which is insensitive to polarization state pump source. A maximum output power 1.44 W, corresponding slope efficiency 41.25%, obtained. The optimized beam quality factor reaches 2.52 when about 1 W. Multi-peak spectra are observed in range 2064.5-2066.6 nm. fluctuation greatly reduced 0.57% average 50 min. degree level 96%. stability and overall structure indicates that diode...

In this paper, we demonstrated a hybrid master oscillator power amplifier (MOPA) laser with high peak and widely tunable pulse repetition frequency (PRF) duration. The first-stage solid-state was carefully designed to keep good beam quality supply gain simultaneously. maximum of 760 kW achieved average 42 W, PRF 50 kHz, duration 1.1 ns, near-diffraction limited quality. MOPA covers broad temporal range 1-100 ns for kHz-1 MHz PRF. Moreover, experimentally numerically figure out that Nd:YVO4...

An electrooptically Q-switched Nd:YLF laser end-pumped by an 880-nm diode with high energy and short pulsewidth at 1 kHz is demonstrated. The asymmetry of the focal lengths thermal lens along a-axis c-axis observed, cylindrical used to compensate for effect a-axis. We experimentally studied performance different combinations output coupler transmission T length f lens. With = 40% 300 mm, 9.5-mJ pulse energy, 9.5-ns pulsewidth, beam quality factors M <sup...

In this paper, a semiconductor laser-pumped high-brightness 1.56 μm polarization-entangled photon pairs with 30-mm-length PPKTP down-converter inside Sagnac-type interferometer is firstly demonstrate. Large active-area InGaAs/InP-based single detectors and step-index multi-mode fiber collection are attempted to evaluate the brightness entanglement quality. The maximum spectral about 1.33×105 pairs(s <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...

We first demonstrate the laser performance of a Cr2+:CdSe passively Q-switched (PQS) 2.09 μm Ho: YAG resonantly pumped by thulium-doped fiber laser. The maximum output pulse energy 1.766 mJ, corresponding to repetition frequency 685 Hz, was obtained with duration 15.4 ns. peak power 114.7 kW, while PQS efficiency 21.45% against continuous-wave output. wavelength in operation precisely measured be 2090.2 nm.

An arbitrary pulse shape by compensating gain saturation in a solid-state Master oscillator power amplifier (MOPA) system made up of three Neodymium doped yttrium vanadate (Nd:YVO4) amplifiers is demonstrated. By investigating the dynamics detail, car-shaped shapes were obtained with compensated distortion. Desired shapes, such as multiple-step, square, parabolic, and Gaussian pulses, achieved, high peak level 41.6 kW narrow linewidth less than 0.06 nm. In addition, through second harmonic...