Under single frequency operation, the maximum output power of 4.16W is obtained at 1064nm with the LD pumping power of 16W. The optical-optical conversion efficiency is more than 30.5%. The slope efficiency is more than 40.2%.
With Ⅰ-type noncritical-phase-match (NCPM), temperature tuning of LBO crystal, a maximum of 5.3 W of cw TEM 00 mode output at 532 nm has been obtained with 20 W pump power, the optical-optical conversion efficiency is 26.5%.
In order to realize the powerful and stable output of 532nm green laser,4.2W of CW TEM 00 output at 532nm was successfully obtained by means of four-mirror Z-cavity resonant structure,LD end-pumped Nd∶YVO 4 and LBO intracavity-doubling with Ⅰ-type angle-match. When the total pumping power of double ends LD is 26W,the optical-optical conversion efficiency is 17.6%.
With a 1.05 W incident pump laser, 48 mW TEM 00 mode red laser output is obtained, with the optical-to-optical conversion of up to 4.7%. Measurements show that the beam divergence angle is less than 0.5 mrad, with the polarization degree of more than 110∶1 and power instability in 24 h of better than ±3%.
At the same time,the experiment of (Tm,Ho)∶YLF microchip laser is conducted,when thre crystal is kept at 19 ℃,the threshold pump power is 425 mW,the slope efficiency is 22.5%,the maximum optical-to-optical efficiency is 17.4%, and the relation between the input power and the output power at four different temperature is obtained.
A maximum green power of 85 W was generated at 20.4 kHz repetition rate and 230 ns pulse width when pumped current of laser diodes was 17.3 A with compensating phase mismatch by angle departuring and strong cooling big KTP crystal, leading to ±1.03% instability and 9.7% of optical optical conversion efficiency.
The emission spectra caused by the transitions from the ion-pair states and f0g+ and G1g of the I2 molecule are obtained by excitation of individual rovibronic levels of the molecule by the method of optical-optical double resonance.
An optical-optical double resonance method for obtaining resolution inside the Doppler width is developed.
Optical-optical double resonance, laser-microwave double resonance, and new Stark effect spectroscopy methods are reviewed, which allow investigation of a large class of molecular species including radicals and small clusters.
The slope efficiency and themaximum optical-optical efficiency were 80 and 70%, respectively, with respect to absorbed pump power.
An attempt has been made to explain this result in terms of Madelung potentials and optical-optical conversion efficiencies.
The dielectric and optical (optical transmission, small-angle light scattering, birefringence) properties of PMNT-0.2 single crystals and their variation induced by a dc electric field have been studied.
A device of the light-light type is controlled by modulating the refractive index in one arm of the interferometer.
A strong electromagnetic field may modify the refractive index of the normal vacuum, which can be reduced to the light-light scattering amplitude via virtual vacuum polarizations in a microscopic sense.
The method is applied to two typical integrals appearing in the corner-ladder and light-light graphs (whose contribution has been until now evaluated only numerically), obtaining their values in closed analytic form.
Gravitational light-light and light-particle scattering: Comparison between the classical (general-relativistic) and quantum fie
The pumping threshold is 55?mW, the light-light conversion efficiency is 58.7%, and a slope efficiency of up to 73% is thus calculated.
Experimental results are reported for a CCTS bistable InGaAsP/InP DH lsser under op-tical injection which produces optical bistabiliry and optical amplification,The bistability ofpIN-poUT for lasers with CW or pulssted operation is shown and some analytes for the resultsare given.
We have studied optical modulation and optical amplification with a single beam and two beams CW Ar~+ Laser in homeotropically aligned nematic liquid-crystal films. Using the spatial self-phase modulation of the Laser beam with the spherical wave travcrsing the liquid-crystal films, we can realize opto-optical modulated amplification. The theoretical analysis is in quantitative, agreement with the experimental results for 5CB liquid_mcrystals.
The characteristics of hydrogen stimulated raman scattering pumped by an injection looking Krf exoimer laser were investigated. The optimum hydrogen gas pressure for maximum conversion efficiency for third stokes emission is lower than that for second Stokes emission. By measuring the beam patterns of these Stokes emissions, the mechanism for these phenomena is discussed.