High-peak-power diode-pumped passively Q-switched Nd:YVO 4 laser (original) (raw)
Related papers
Applied Physics B, 2012
The natural birefringence of the Nd:YLF crystal is utilized to achieve a reliable TEM 00-mode linearly polarized laser at 1053 nm in a compact concave-plano resonator. The efficient selection of the polarization relies on the combined effect of the difference in diffraction angle for σand π-polarization of a wedged laser crystal and the alignment sensitivity of an optical resonator. We further employ a Cr 4+ :YAG saturable absorber to perform the passively Qswitched operation. At an incident pump power of 12 W, the maximum average output power is up to 2.3 W with a pulse repetition rate of 8 kHz and a pulse width of 9 ns. The pulse energy and peak power are found to be 288 µJ and 32 kW, respectively.
Passively Q-switched Nd:YVO_4 laser with greater than 11W average power
Optics Express, 2011
This paper presents the highest average power passively Qswitched Nd:vanadate laser, to the best of our knowledge. A maximum average output power greater than 11W was demonstrated using a Nd:YVO 4 bounce geometry laser operating at 1064nm in TEM 00 mode, with a spatially stigmatic design. Pulse energies greater than 58µJ and peak powers in excess of 1.9kW were obtained; the maximum repetition rate recorded was 190kHz, close to the upper limit achievable with Cr 4+ :YAG saturable absorbers.
Diode-pumped double passively Q-switched Nd:GdVO4 laser
Optoelectronics Letters, 2008
Through using both Cr 4+ :YAG and GaAs saturable absorbers, a diode-pumped double passively Q-switched Nd:GdVO 4 laser is realized and compared with a single passively Q-switched laser. This laser can generate symmetric pulse temporal profiles and shorter pulses. A laser pulse width of 17 ns has been achieved with the incident pump power of 8.5 W.
Short pulse, high peak power, diode pumped, passively Q-switched 946 nm Nd:YAG laser
Optics Communications, 2007
We report on generation of 946 nm laser pulses of a few nanosecond duration and up to 3.7 kW peak power from a compact diodepumped passively Q-switched Nd:YAG laser. This power is 2.5 times as much as what previously has been obtained from this type of a laser. The short pulses with the record high peak power may be particularly attractive for laser range finding type applications.
High-power diode-pumped actively Q-switched Nd:YAG laser at 1123 nm
Optics Communications, 2004
A high-power diode-pumped Nd:YAG laser at 1123 nm is acousto-optically Q-switched at a pulse repetition rate range of 5-20 kHz. Experimental results reveal that the resonator mirrors need to suppress parasitic oscillations on lines in the 1064 nm as well as 1319 nm regions for actively Q-switching operation. With an incident pump power of 19.2 W, the pulse energy increases from 0.15 mJ at 20 kHz to 0.4 mJ at 5 kHz. The highest peak power is up to 8.0 kW at 5 kHz. Furthermore, a conventional model of coupled rate equations is used to analyze the experimental data. The general agreement indicates that the simple model is adequate for a first order prediction of the low-gain laser characteristics.
Diode-Side-Pumped Nd: YVO4 Laser Q-Switched with LiF: Saturable Absorber
2005
Abstract—Passive Q-switching (PQS) of a diode-side-pumped Nd: YVO4 laser using a LiF: crystal as a saturable absorber is reported. Using the grazing-incidence cavity geometry, we obtain trains of giant pulses of duration as short as~ 10 ns and peak power of hundreds of watts. The laser efficiency and beam quality in the PQS regime are shown to essentially depend on the cavity arrangement and output coupler reflectivity.
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.
Transversally diode-pumped Q-switched Nd:YAG laser with improved power and spatial characteristics
Optics Communications, 2013
The power and output beam spatial properties of the transversally diode-pumped Q-switched Nd:YAG laser with the active element surrounded by the low-absorption light-scattering layer have been investigated. The layer consisted of the bonding agent in which the solid particles, like aluminum oxide or magnesium oxide, effectively scattering the light was uniformly distributed. The particle diameter was mainly in the range of 2-5 μm. It has been shown that application of such layer to the diode-pumped Q-switched Nd:YAG laser head allows suppressing the amplified spontaneous emission and/or internally circulating parasitic lasing modes. At the optimized concentration of the light-scattering solid particles the output lasing pulses with the energy of 188-210 mJ (the wavelength of 1064 nm, the pulse repetition rate of 30 Hz) and improved spatial characteristics were obtained using the pump unit based on three laser diode matrixes.
Analysis of a diode-pumped Nd:YVO4 laser passively Q switched with GaAs
Optics & Laser Technology, 2001
A diode-pumped Nd : YVO4 laser passively Q switched with GaAs is studied theoretically and experimentally. We have demonstrated the in uence of single-photon absorption, two-photon absorption and free-carrier absorption in GaAs on the Q-switched pulse characteristics. The pulse proÿle, pulse energy and pulse width of the Q switching with GaAs are simulated by using the conventional rate equations of the four-level laser system. The experimental results show reasonable agreement with the theoretical results on the whole.