Oxygen iodine laser kinetics and small signal gain

Willy L. Bohn; Keith A. Truesdell; W. Pete Latham; Petras V. Avizonis

doi:10.1117/12.34703

1 June 1990 Oxygen iodine laser kinetics and small signal gain (Abstract Only)

Willy L. Bohn, Keith A. Truesdell, W. Pete Latham, Petras V. Avizonis

Proceedings Volume 1225, High-Power Gas Lasers; (1990) https://doi.org/10.1117/12.34703
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

A simple model for predicting the small signal gain as a function of flow direction will be presented. The small signal gain was measured on the Weapons Laboratory Rotocoil 0₂/I^* gain medium. The characteristics observed in the experiment show a decrease in the small signal gain as a function of distance from the nozzle exit plane. Further results indicated that the small signal gain decreased with time and that the gain increased when the cold trap was turned on. All of these effects suggest a temperature dependence of the small signal gain. The approach presented in this paper is to develop a simple model which includes a simplified kinetics model and the gas dynamics for the flowing medium. An analytic solution to the model equations is also derived. These models account for the reduction in small signal gain in the flow direction due to heat release into the cavity when compared to the Rotocoil small signal gain data. The results show that the rise in gas temperature in the flowing 0₂/I^* medium is primarily due to water deactivation of the I^* and the O₂(1Δ) plus I^* pooling leading to water deactivation of ¹Σ. Such temperature rise in the flowing medium causes the small signal gain to decay substantially in the flow direction due to the square root of the temperature dependence in the stimulated emission cross section, the shift in the equilibrium constant with temperature and the decrease in density which is inversely proportional to the temperature.

Citation Download Citation

Willy L. Bohn, Keith A. Truesdell, W. Pete Latham, and Petras V. Avizonis "Oxygen iodine laser kinetics and small signal gain (Abstract Only)", Proc. SPIE 1225, High-Power Gas Lasers, (1 June 1990); https://doi.org/10.1117/12.34703

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
9 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Data modeling

Oxygen

iodine lasers

Weapons

Electroluminescence

Gas lasers

High power lasers

Show All Keywords

Keywords/Phrases

Search In:

Publication Years