Notification:
We are currently experiencing intermittent issues impacting performance. We apologize for the inconvenience.
By Topic

Beam steering in confocal unstable resonators

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)
Chester, A. ; Hughes Research Labs., Malibu, CA, USA

The effects of mirror misalignment in a confocal unstable resonator are interpreted in terms of beam steering or deflection in the output beam. Exact mode solutions for a resonator with a Gaussian output mirror lead to an expression for the far-field beam-steering angle as a function of the magnification and Fresnel number of the resonator. This solution reduces to the geometric result when the Fresnel number exceeds 10, for output couplings greater than 50 percent. An expression is derived that relates the beam diameter, the mirror vibration amplitude, and the far-field beam divergence. Numerical values are presented that show that in order to prevent the far-field intensity of a 10.6-μm laser beam from being degraded by a factor of two, the product of the mirror vibration angle and the beam diameter should typically not exceed 220 μrad-cm.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:9 ,  Issue: 2 )