Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Optica Applicata

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: thermal lensing

Sortuj według:

Ogranicz wyniki do:

Laser beam propagation in gain media of diode pumped lasers

Jabczyński J. K., Kwiatkowski J., Żendzian W.

Optica Applicata

2003

Vol. 33, nr 2-3

411-420

Two models of gain and thermal guiding effects were derived. In the first one, the complex ABCD matrix for a crystal under gain and thermal guiding was applied to describe the operation of microchip near threshold. In the second one, a simple iterative procedure was proposed to calculate effective fundamental mode parameters of a cavity under thermal and gain guiding for given bare cavity ABCD matrix and pumping parameters, including gain saturation, passive cavity losses and reabsorption ones. The influence of gain guiding effects causes changes of waist width in the range up to 50% compared to expectations derived from thermal guiding theory. Application of such a method for resonators of passively Q-switched lasers was proposed. Results of calculations for microchips were verified with experiment.

Modelling of laser pumped intracavity frequency doubled laser.

Jabczyński J.K.

Optica Applicata

2000

Vol. 30, nr 1

161-171

A model of an intracavity frequency doubled laser pumped by a laser beam was elaborated. The effects connected with mode matching, thermal lensing, pump induced diffraction losses, as well as parameters of frequency conversion and geometry of cavity were considered. An analytical model of the cavity with an internal lens and thermal lensing was derived to optimize output characteristics. Two types of cavity (with and without internal lens) were analyzed and the best configurations with respect to second harmonic output power were found for both cases. The pump induced diffraction losses were found to limit the output power of the frequency doubled laser for high pump levels.