Self activated, forced convective cooling in pulsed slab CO2 laser

Yoav Sintov; Amnon Gabay; Shaul Yatsiv

doi:10.1117/12.270194

4 April 1997 Self-activated forced convective cooling in pulsed slab CO₂ laser

Yoav Sintov, Amnon Gabay, Shaul Yatsiv

Proceedings Volume 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (1997) https://doi.org/10.1117/12.270194
Event: XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, 1996, Edinburgh, United Kingdom

Abstract

A marked improvement is observed in the performance of pulsed microwave excited slab carbon-dioxide laser when the gas is permitted to expand following a discharge pulse. The gas pressure changes following each discharge pulse indicate a heating followed by expansion and contraction stages. A sequence of over ten reciprocating cycles is observed after each pulse. Two modes of operation (open versus closed) were investigated. The gas motion in and out of the discharge space in the open structure, leads to a faster overall cooling than for fully confined gas. Pressure changes driving the reciprocating motion of the activated gas are monitored. Maximum average output power of 20 W with 10% efficiency and about 1 KW peak power were obtained from the open structure at gas pressure of 210 mmHg. The absence of the expansion cooling mechanism in the closed structure caused about 40% reduction in the output power and efficiency. The results of the present research suggest a new architecture for pulsed lasers that provides a gas cooling markedly faster than the conductive cooling of a stagnant gas in the same geometry.

Citation Download Citation

Yoav Sintov, Amnon Gabay, and Shaul Yatsiv "Self-activated forced convective cooling in pulsed slab CO₂ laser", Proc. SPIE 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (4 April 1997); https://doi.org/10.1117/12.270194

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