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

Intrinsic limits of the efficiency of 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

3 Author(s)
Georgescu, S. ; Inst. of Atomic Phys., Nat. Inst. for Lasers, Bucharest, Romania ; Toma, O. ; Totia, H.

Mathematical modeling, based on rate equations, is used to estimate the theoretical limit of the emission efficiency of 3-μm Er:YAG laser (laser transition 4I112/→4I132/) in both continuous wave (CW) and free-generation regimes. This model exclusively uses spectroscopic data and includes upconversion from both initial and terminal laser levels as well as the cross relaxation from the "pump level" 4S32/. The recirculation of the excitation on the metastable levels of the Er3+ ion - produced by the energy-transfer processes, very active at high erbium concentrations - leads to supraunitary quantum efficiency and high emission efficiency in the CW regime. In the Q-switch regime, in contrast with CW (or free generation) regime, the energy-transfer processes are "frozen" during the giant pulse generation, the access to the stored energy is limited and the laser efficiency is rather low. In this paper, we find simple analytic expressions for the emission efficiency in CW, free-generation, and Q-switch regimes. The same figures of merit are used for all these regimes. The predictions of our model are then compared with available experimental results. Some suggestions to improve the overall efficiency of the 3-μm erbium lasers, working in the Q-switch regime, are given.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:39 ,  Issue: 6 )

Date of Publication:

June 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.