High power passively Q-switched ytterbium fiber laser with Cr(4+):YAG as a saturable absorber (original) (raw)
Related papers
IEEE Photonics Technology Letters, 2007
A high-power and high-repetition-rate passively Q-switched ytterbium-doped single-mode double-clad fiber laser was built using a Cr 4+ :YAG saturable absorber (SA). Two different SAs with initial transmissions of T 0 = 30% and T 0 = 50% were studied. At the maximum coupled pump power of 9.8 W, an output power of 4.7 W, pulse duration of 143 ns, pulse repetition rate of 253 KHz, pulse energy of 18.5 J, and slope efficiency of 49% were obtained with the T0 = 30% SA.
Passively Q-Switched Yb:YAG Laser with Cr4+:YAG as the Saturable Absorber
Applied Optics, 2001
By using a continuous-wave Ti:sapphire laser as a pumping source, we demonstrated a passively Q-switched Yb:YAG laser at room temperature with Cr(4+):YAG as the saturable absorber. We achieved an average output power of as much as 55 mW at 1.03 mum with a pulse width (FWHM) as short as 350 ns. The initial transmission of the Cr(4+):YAG has an effect on the pulse duration (FWHM) and the repetition rate of the Yb:YAG passively Q-switched laser. The Yb:YAG crystal can be a most promising passively Q-switched laser crystal for compact, efficient, solid-state lasers.
IEEE Photonics Technology Letters, 2000
We explored efficient nanosecond pulse generation in a passively -switched cladding-pumped Yb-doped fiber laser by use of an external-cavity configuration containing a Cr 4+ : YAG saturable absorber crystal. By exploiting passive -switched regime and stimulated Brillouin scattering, pulses of durations as short as 2.7 ns, corresponding to a peak power of 9 kW, have been achieved. The laser was tunable over 70 nm and green output power generation was obtained by external frequency doubling in a KTP crystal.
IEEE Journal of Quantum Electronics, 2010
Two high-power and high-repetition-rate passively Q-switched Yb-doped double-clad fiber lasers have been demonstrated with small (5.4 m) and medium (10 m) core diameters using Cr 4+ :YAG as an external saturable absorber. At a pump power of 13.8 W, 7.8 W single-mode outputs have been obtained with a pulse repetition rate of 120 kHz, pulse energy of 65 J, and pulse duration of 116 ns. A theoretical model is developed to predict the laser spectrum and numerically simulate the output characteristics versus pump power. The focused beam in Cr 4+ :YAG is assumed to have a Gaussian profile and is analyzed using traveling wave rate equations. The effect of amplified spontaneous emission is also investigated in the simulation, which shows reasonable agreement with experimental observations.
ASEAN Journal on Science and Technology for Development, 2017
The results in research and development of diode-pumped passively Q-switched Nd:YVO4 lasers are presented with Cr4+:YAG crystal used as an intra-cavity saturable absorber. Using a-cut Nd:YVO4 laser crystals, the passively Q-switched lasers have been successfully developed and provided stable single shortest pulses of 40 ns at the repetition rate of 18.5 kHz, the maximal average output power of 180 mW was achieved corresponding to the optical efficiency of 9% and the slope efficiency of 16%. The dependences of average output power, repetition rate, pulse width and peak power on pump diode power for different transmissions of output mirror are also investigated.
Linearly polarized intracavity passive Q-switched Yb-doped photonic crystal fibre laser
2014
In this paper we report linearly polarized high average power passive Q-switched ytterbium-doped photonic crystal fibre laser with a Cr 4+ :YAG crystal as a saturable absorber. An average output power of 9.4 W with pulse duration of 64 ns and pulse repetition rate of 57.4 kHz with a slope efficiency of 52% was achieved. Measured polarization extinction ratio (PER) of the Q-switched laser output was 10.5 dB.
Composite Yb:YAG/Cr^4+:YAG/YAG crystal passively Q-switched lasers at 1030 nm
Applied Optics, 2015
We experimentally demonstrate efficient passively Q-switched bulk lasers with composite Yb:YAG∕Cr 4 :YAG∕YAG crystals at 1030 nm for the first time, to the best of our knowledge. The output performance was investigated based on different initial transmissions (T 0 ) of Cr 4 :YAG and different transmissions (T oc ) of output coupler. Stable passive Q-switching with composite crystal of T 0 85% and output coupler of T oc 32% resulted in the maximum average output power of 2.55 W, with corresponding pulse duration of 11.5 ns and repetition rate of 5.71 kHz. The pulse energy and peak power were 446.25 μJ and 38.8 kW, respectively.