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%.
4. We report the intra-cavity frequency doubling based on PP-MgO:SLT with thedimensions of 20×10×1mm~3, the optical-optical conversion efficiency is 19% andthe maximum output is 2.1W while the pump power is 11W.
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.
This paper will discuss the principles of color and light together with their applications in environmental design by researching into various aspects of natural and artificial light, color temperature and color display of light, light blending, light and color coordination, and material and radiation. The study provides an artistic and scientific basis, which will help people to apply natural and artificial light in a more rational way.
With the quasi three level model and a ordinary Nd∶YAG rod as gain medium, by using a short three folded cavity resonator that is in sensitive to thermal effect, under the condition of 14 W pump power, high power TEM 00 mode blue laser at 473 nm of 1.1 W is obtained at last, with the light light conversion efficiency up to 7.9%, the threshold value is just 2 W.
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.
The paper presents a critical analysis of publications on one of the methods of creating so-called slow light (light with an anomalously low group velocity) arising due to a high steepness of the refractive index dispersion curve.
The animals were kept under artificial light (light on 6:00 h-20:00 h).
A white-light light-emitting diode (LED) was successfully fabricated by converting near-UV LED emission (390-420?nm) with a new inorganic/organic hybrid phosphor.
Circular plasmids, as well as chromosomal DNA, were of light/light or light/heavy density.
The rhythms persisted in subsequent uniform light/light conditions.