The effect of high dose rate transient gamma radiation on high-energy optical fibers

A. Akinci; M. D. Bowden; M. C Cheeseman; S. L Knowles; D. C. Meister; S. N Pecak; K. Simmons Potter

doi:10.1117/12.826281

28 August 2009 The effect of high dose rate transient gamma radiation on high-energy optical fibers

A. Akinci, M. D. Bowden, M. C Cheeseman, S. L Knowles, D. C. Meister, S. N Pecak, K. Simmons Potter

Proceedings Volume 7434, Optical Technologies for Arming, Safing, Fuzing, and Firing V; 74340A (2009) https://doi.org/10.1117/12.826281
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

High power laser systems have a number of uses in a variety of scientific and defense applications, for example laser induced breakdown spectroscopy (LIBS) or laser-triggered switches. In general, high power optical fibers are used to deliver the laser energy from the source to the target in preference to free space beams. In certain cases, such as nuclear reactors, these optical systems are expected to operate in ionizing radiation environments. In this paper, a variety of modern, currently available commercial off-the-shelf (COTS) optical fiber designs have been assessed for successful operation in the transient gamma radiation environment produced by the HERMES III accelerator at Sandia National Laboratories, USA. The performance of these fibers was evaluated for high (~1 MW) and low (<1 W) optical power transmission during high dose rate, high total dose gamma irradiation. A significant reduction in low optical power transmission to 32% of maximum was observed for low OH- content fibers, and 35% of maximum for high OH- fibers. The high OH- fibers were observed to recover to 80% transmission within 1 μs and 100% transmission within 1 ms. High optical power transmission losses followed generally similar trends to the low optical power transmission losses, though evidence for an optical power dependent recovery was observed. For 10-20 mJ, 15 ns laser pulses, around 46% was transmitted coincident with the radiation pulse, recovering to 70% transmission within 40 ns of the radiation pulse. All fibers were observed to completely recover within a few minutes for high optical powers. High optical power densities in excess of 1 GW/cm² were successfully transmitted during the period of highest loss without any observed damage to the optical fibers.

Citation Download Citation

A. Akinci, M. D. Bowden, M. C Cheeseman, S. L Knowles, D. C. Meister, S. N Pecak, and K. Simmons Potter "The effect of high dose rate transient gamma radiation on high-energy optical fibers", Proc. SPIE 7434, Optical Technologies for Arming, Safing, Fuzing, and Firing V, 74340A (28 August 2009); https://doi.org/10.1117/12.826281

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