Optical parametric generation in biaxial KTA crystal under pumping by YAG:Nd laser in arbitrary directions

Performance of the Optical Parametric Generation in Nonlinear KTP Crystal at Nd:YAG Laser Pumping

The tuning curves, angular and spectral phase-matching widths are calculated for all possible kinds of OPG in the principal planes of biaxial KTP crystal with Nd:YAG laser pumping at 1.064 μ wavelength. The plots presented enable the maximal nonmonochromaticity and radiation divergence to be found for any value of the signal wave and different interaction types. A particular emphasis has been p...

Optical parametric generation in CGA crystal

We have demonstrated optical parametric generation (OPG) in CGA crystal known for its extremely high secondorder nonlinearity (236 pm/V). A single-pass OPG was pumped by 10 lJ, 600 fs pulses at k 1⁄4 5 lm and the output was tunable in the 7–18 lm range. Efficient second harmonic generation of 9–11 lm radiation with an internal conversion efficiency of 62% has also been demonstrated. 2002 Elsevi...

control of the optical properties of nanoparticles by laser fields

در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...

Optical frequency comb generation by pulsed pumping

Optical pumping in 3He with a laser

2014 Optical pumping of ground state 3He has several peculiar features because nuclear polarization is first obtained in the metastable 2 3S state and then transferred to the ground state (indirect optical pumping); this introduces non-linearities in the equation of evolution of the populations. Here we present a numerical calculation of the kinetics of optical pumping in 3He, which allows a de...