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Lasers are an indispensable tool for current XUV and X-ray free electron light sources and are key to future laser driven accelerator technology. We discuss the role of fiber-laser technology in this emerging field.
Holmium-doped ZBLAN fiber has proven to be an efficient high gain material in the 1.2 µm region. In this paper, single-mode fiber lasers and amplifiers at 1178 nm, 1190 nm, and 1200 nm are reported. Over 2 watts of continuous wave output power was achieved with a 10-cm long gain fiber.
This is the first time that significant Stokes output power of 0.88 W at 990 nm has been achieved using a three-level fundamental transition (quasi-cw Nd:YLF laser) with stimulated Raman scattering in a KGW crystal.
We present simple and efficient laser schemes based on newly developed Er-doped fibers cladding pumped at 976 nm. 103 W CW-power amplifier with 37 % conversion efficiency and 1.5 mJ-pulse energy nanosecond laser were demonstrated.
We report a high peak power monolithic nanosecond pulsed fiber laser in MOPA configuration. The system can produce ∼ 709 kW peak power for 3.3 ns fiber laser pulses at 10 kHz repetition rate.
A novel high pulse-energy Yb-doped all-fiber dual-cavity laser with large core-diameter fiber-based passive Q-switcher is reported. The monolithic fiber oscillator generates pulses with peak power of 3.4 kW and single pulse energy of 484 µJ.
We report efficient and robust Kerr-lens mode-locking of single-mode and tapered diode-pumped Cr:LiSAF lasers by using gain-matched output couplers. Sub-15-fs pulses were generated with peak powers above 60-kW and optical-to-optical conversion efficiencies up to 21%.
A high-efficiency continuous-wave laser-diode-pumped Yb:YAG laser has been realized at room temperature by high intensity pumping. The slope efficiency and optical-to-optical conversion efficiency were 77 % and 72 % for the absorbed pump power, respectively.
We report an efficient, high-energy, diode-pumped Yb:CaF2 regenerative amplifier. Energies up to 1.02 mJ at 1045-nm and 5 kHz-repetition rate in 324 fs-long pulses have been obtained with a beam quality factor of M2 =1.1.
We present a chalcogenide microwire device that acts as a compact (∼11 cm length, ∼1 µm diameter) and power efficient (sub-Watt threshold peak power, >2% slope efficiency) Raman-parametric laser, wavelength converter and ultra-broadband supercontinuum generator/amplifier.
We demonstrate high gain producing 60 mJ, 200 ps pulses at 200 Hz from a single 4-mm ASE limited gain-cell. A scaling paradigm utilizing a monolithic array of gain cells is proposed.
Opto-mechanically controlled liquid crystalline elastomer (LCE) integrated tunable polymeric microgoblet lasers are fabricated on a silicon chip. Symmetrical deformation of uniaxially aligned LCE microcylinders enables expansion of the microgoblet resonators for tuning the lasing modes.
A doubly-resonant AgGaSe2 mid-infrared optical parametric oscillator (OPO) is synchronously pumped by a hybrid 2 µm Er:fiber/Tm:fiber femtosecond mode-locked laser. The OPO produces spectra ranging from 3–5 µm. Numerical simulations confirm the observed behavior.
We report the use of [100]-cut YAG/Nd:YAG composite in a microchip laser to reduce depolarization at high average power. Consequently, we achieve FHG giving > 0.5 MW peak power, 1 kHz at 266 nm.
We report a diode-pumped Yb:LYSO laser with a SESAM for mode-locking. Pulse with duration as short as 61 fs was obtained at repetition rate of 113 MHz. The average output power was 40 mW.
We demonstrate a mode-locked Nd3+,Y3+:SrF2 laser for the first time. Pumped with 1.5W continuous Ti:sapphire laser, average output power of 280mW was obtained with pulse duration of 181fs at central wavelength of 1057 nm.
We present a SESAM modelocked diode-pumped Yb:CaGdAlO4 laser with a 1.8-GHz repetition-rate, a 3.5-W average output power and a 60-fs pulse duration, which results in a record high peak power of 28.9 kW.
We demonstrate robust continuous-wave lasing in a planar index-antiguided waveguide with a 220-µm Nd:YAG active layer. A pump-limited output of 1.5 W with a slope efficiency of 30% with respect to absorbed pump power is achieved.
We demonstrate a tunable mid-infrared (6.3–7.8-µm) vortex laser formed of a 1-µm vortex pumped optical parametric oscillator and a difference frequency generator. Maximum output energy of 160-µJ was obtained at a wavelength of 6.5-µm.
Difference-frequency generation between signal and idler of Yb-fiber laser synchronously-pumped femtosecond / picosecond OPOs at 53/80 MHz provides maximum single pulse energies exceeding 1 nJ and continuous tuning from 5 µm to 12 µm.
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