A promising method for generation of relatively high-power and tunable yellow light based on optical parametric oscillator has been proposed and experimentally demonstrated. In the premise of optical efficiency, the tuning range of the yellow light is over 1.5 nm. Under the incident pump power of 21.9 W, average output power of 1188 mW and peak power of 2.9 kW at 575 nm are generated in our experiment.
A promising method for generation of relatively high-peak-power and high-energy yellow light based on doubling actively Q-switched Nd:YAG-Nd:YVO4 hybrid gain intracavity Raman laser at 1176 nm has been proposed and experimentally demonstrated for the first time. Under the incident pump power of 42.0 W, pulse energy of 0.37 mJ and peak power of 75 kW at 1176 nm were generated in our experiment.
Efficient 588-nm yellow laser with high pulse energy and peak power is generated based on an intracavity frequency doubled Q-switched Nd:YVO4 self-Raman laser. The cavity is elaborately designed to ensure high conversion efficiencies in both Raman and second harmonic generation processes, and meanwhile mitigate the thermal load deposited in gain medium so as to help improve power scalability. At the pulse repetition frequency of 60 kHz, 6.33 W of 588-nm yellow output is obtained under 30.3-W incident pump. The pulse energy of 167 μJ and peak power of 33.4 kW are also obtained at 30 kHz.
We report a pulsed, widely tunable Ti:sapphire laser pumped by an all-solid-state Q-switched intra-cavity
frequency-doubled Nd:YAG laser with repetition rate of 7 KHz. Using two dense flint glass prisms as dispersion
elements, the output wavelength could be continuously tuned over 675-970 nm, with spectral line-width of 2 nm.
Gain-switching characteristics of Ti: sapphire laser shortened the pulse width to 17.6 ns. Well mode matching between
pump and laser beam in the sapphire crystal and thermal design of the cavity ensured stable, efficient laser operation.
The maximum output power was 6.2 W at 780 nm when the 532 nm pump power was 22 W; corresponding conversion
efficiency was 28.2%.
We investigated the infrared spectra of the optical damage caused by laser diode at 808 nm in iron-doped lithium niobate crystals. The spectra show that the OH− absorption band in the region of the optical damage exhibits a structure consisting of three peaks. Comparing to the spectra at the non-damage region the main peak moves to red. The result will be helpful to microphotonic device applications.
The photorefractive effect in Indium-doped litium niobate crystal was studied. We found that the enhanced photorefractive sensitivity could be realized in the so-called photorefractive resistance lithium niobate crystals, even higher than the well-known iron doped ones. We explained the unusual qualitatively. The experimental result enriches us the knowledge of the properties of doped lithium niobate crystals and provides some advice in growing specific crystal.
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