Faraday isolators for high average power fundamental mode radiation

Kolja Nicklaus; Torsten Langer

doi:10.1117/12.842121

17 February 2010 Faraday isolators for high average power fundamental mode radiation

Kolja Nicklaus, Torsten Langer

Proceedings Volume 7578, Solid State Lasers XIX: Technology and Devices; 75781U (2010) https://doi.org/10.1117/12.842121
Event: SPIE LASE, 2010, San Francisco, California, United States

Abstract

The basic principles of faraday isolation and thermal effects in the rod geometry under high power operation have been reviewed. The temperature dependency of the verdet-constant and the magnetization of NdFeB have been identified as the limiting factor of isolation ratio for an unchilled high power isolator device. The focal shift due to the isolator with rod-geometry is independent from beam diameter and strongly depending on beam quality. A highly compact isolator for unpolarized radiation up to 400 W fundamental mode for industrial application surrounding with minimal thermal lensing has been developed. At 400 W and 10-40 °C a transmission of 95-97 %, an isolation larger 20 dB, a thermal focus shift of less than 2 rayleigh ranges and a M² smaller than 1.2 have been achieved.

Citation Download Citation

Kolja Nicklaus and Torsten Langer "Faraday isolators for high average power fundamental mode radiation", Proc. SPIE 7578, Solid State Lasers XIX: Technology and Devices, 75781U (17 February 2010); https://doi.org/10.1117/12.842121

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