Cart (Loading....) | Create Account
Close category search window
 

Analysis of heat generation and thermal lensing in erbium 3-μm lasers

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Pollnau, M. ; Appl. Photonics Lab., Swiss Fed. Inst. of Technol., Lausanne, Switzerland

The influence of energy-transfer upconversion (ETU) between neighboring ions in the upper and lower laser levels of erbium 3-μm continuous-wave lasers on heat generation and thermal lensing is investigated. It is shown that the multiphonon relaxations following each ETU process generate significant heat dissipation in the crystal. This undesired effect is an unavoidable consequence of the efficient energy recycling by ETU in erbium 3-μm crystal lasers, but is further enhanced under nonlasing conditions. Similar mechanisms may affect future erbium 3-μm fiber lasers. In a three-dimensional finite-element calculation, excitation densities, upconversion rates, heat generation, temperature profiles, and thermal lensing are calculated for a LiYF4:Er3+ 3-μm laser. In the chosen example, the fraction of the absorbed pump power converted to heat is 40% under lasing and 72% under nonlasing conditions. The heat generation in a LiYF4:Er3+ 3-μm laser is 1.7 and the thermal-lens power up to 2.2 times larger than in a LiYF4:Nd3+ 1-μm laser under equivalent pump conditions, thus, also putting a higher risk of rod fracture on the erbium system.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:39 ,  Issue: 2 )

Date of Publication:

Feb 2003

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.