Model of optimization of passively Q-switched laser parameters

Waldemar Zendzian

doi:10.1117/12.402867

4 October 2000 Model of optimization of passively Q-switched laser parameters

Waldemar Zendzian

Proceedings Volume 4237, Laser Technology VI: Progress in Lasers; (2000) https://doi.org/10.1117/12.402867
Event: Laser Technology VI, 1999, Szczecin, Poland

Abstract

The paper presents optimization of energy and peak power of the pulse oaf laser with a slow passive Q-switch. The excited states absorption (ESA) in absorber is included in an optimization process. The described laser's model provides determination of the optimal values of unsaturated absorber transmission and reflectivity of the output mirror as a function of the normalized initial gain coefficient z and a, characterizing the ratio of the absorption cross- section of the nonlinear absorber to the emission cross- section of the laser medium. In addition, the a parameter has been modified with its value dependent on the magnification M, determining the ratio of the cross-section of the laser beam in the laser medium to the cross-section of the laser beam in the nonlinear absorber. To optimize the passively Q-switched laser the charts and simple analytical formulas, presented in the paper, can be applied. The paper presents also analytical formulas determining the values of laser pulse generation, i.e., pulse duration, its energy, and peak power. As an example, optimization of energy and peak power of the pulse of Nd:YAG laser, with Cr⁴⁺:YAG crystal as passive Q-switch, pumped by 100 W matrix of laser diodes was presented. It was shown that for laser energy optimization, ESA slightly changes the value of optimal unsaturated absorber transmission and optimal reflectivity of the output mirror of the laser.

Citation Download Citation

Waldemar Zendzian "Model of optimization of passively Q-switched laser parameters", Proc. SPIE 4237, Laser Technology VI: Progress in Lasers, (4 October 2000); https://doi.org/10.1117/12.402867

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available