Generation of the third harmonic of light pulses in gases with a spatial self-interaction

Journal Article · Tue Jun 30 04:00:00 EDT 1998 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE1998V028N06ABEH001264· OSTI ID:21437778

Butylkin, V S ^[1]

---

1. Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Fryazino, Moscow Region (Russian Federation)

An investigation is reported of the influence of the pump pulse profile on the efficiency of third-harmonic generation (THG) in gases. Generation of the third harmonic from parabolic pulses with different parabola orders is investigated analytically on the basis of a Kerr-free model. Gases with a nonlinear phase mismatch and with self-focusing or self-defocusing are studied by numerical simulation. It is shown that the efficiency of THG in a medium with pump self-focusing can decrease significantly (by an order of magnitude) if the pump pulses are not rectangular. In a medium with pump self-defocusing the reduction in the efficiency is roughly the same (approximately by a factor of two) as that deduced on the basis of the Kerr-free model. Control of the pump pulse profile and/or a search for gas mixtures with self-defocusing are recommended for increasing the THG efficiency. (nonlinear optical phenomena and devices)

• OSTI ID: 21437778
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 6 Vol. 28; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPUTERIZED SIMULATION
EFFICIENCY
ELECTROMAGNETIC RADIATION
FLUIDS
FOCUSING
FREQUENCY MIXING
GASES
HARMONIC GENERATION
INTERACTIONS
NONLINEAR PROBLEMS
PARABOLAS
PULSES
RADIATIONS
SHAPE
SIMULATION
VISIBLE RADIATION