Dependence of laser properties on statistical distortions of active medium

Keming Du

doi:10.1117/12.150602

13 August 1993 Dependence of laser properties on statistical distortions of active medium

Keming Du

Proceedings Volume 1868, Laser Resonators and Coherent Optics: Modeling, Technology, and Applications; (1993) https://doi.org/10.1117/12.150602
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

In this paper we are interested in the effects of statistical phase and gain distortions. We will present experimental results, which show the strong dependencies of the beam quality of a 13 kW CO₂ laser with an unstable resonator on the gas flowing state and on the rf-excitation power. These dependencies are mainly attributed by the phase distortion (stationary and statistical) of the active medium, resulting from the gas discharge, from the turbulence of the high mass rate flow and from the interaction between the turbulence and the discharge. In order to estimate the influences of the statistical phase and gain distortions on beam quality and output power, a theoretical model has been developed, where the phase and gain distortions are simulated using two statistical phase sheets and two gain sheets, respectively, located near the both resonator mirrors. Using the model the dependencies of beam quality, the Strehl ratio and output power on the dimension and the strength of the statistical phase and gain distortions were investigated. The numerical results will be discussed.

Citation Download Citation

Keming Du "Dependence of laser properties on statistical distortions of active medium", Proc. SPIE 1868, Laser Resonators and Coherent Optics: Modeling, Technology, and Applications, (13 August 1993); https://doi.org/10.1117/12.150602

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