Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Thermal Runaway in Germanium Laser Windows

Not Accessible

Your library or personal account may give you access

Abstract

The absorption coefficient of 50-Ω cm germanium was measured over the 400–2000 cm−1 wavenumber region for temperatures from 300 K to 450 K. Lattice absorption is negligible for wavenumbers greater than 900 cm−1; at a wavelength of 10.6 μm the absorption is due entirely to free carrier effects. The thermal runaway characteristics of germanium windows on a CO2 laser, operating at 10.6 μm, were studied. For each cooling mechanism used there was a well-defined critical value of power density (Pc), below which the germanium temperature stabilized and above which runaway occurred. The highest value of Pc obtained was 88 W cm−2, by cooling the germanium below ambient.

© 1971 Optical Society of America

Full Article  |  PDF Article
More Like This
Thermal runaway in germanium laser windows

Kalman Wilner, E. Klinger, and Walter J. Wild
Appl. Opt. 21(10) 1796-1800 (1982)

Thermal Runaway in Semiconductor Laser Windows

R. L. Johnson and J. D. O’Keefe
Appl. Opt. 11(12) 2926-2932 (1972)

Surface and bulk absorption in germanium at 10.6 μm

Colin J. Hutchinson, Colin Lewis, James A. Savage, and Andrew Pitt
Appl. Opt. 21(8) 1490-1495 (1982)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved