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Influence of core diameter and coating material on nanosecond laser-induced damage threshold of optical multimode fibers

G. MANN1, M. JURKE1, M. ZOHEIDI2, M. EBERSTEIN1, J. KRÜGER1,*

Affiliation

  1. BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany
  2. FiberTech GmbH, Nalepastrasse 171, 12459 Berlin, Germany

Abstract

Single and multi pulse laser-induced damage thresholds (LIDT) of core, cladding, and coating materials of high-power optical multimode fibers were determined in accordance with ISO 11254 for 532 nm and 1064 nm wavelength in the 10-ns pulse duration regime with spatial Gaussian beam shape. For all-silica fibers, LIDT increases with rising core diameter in a range between 100-600 µm for a constant cladding-core ratio of 1.2. The damage resistance of the low refracting cladding (0.3 % fluorine doped fused silica) is comparable to the undoped SiO2 core. Coating materials show significantly lower LIDT than light-guiding parts of the fibers..

Keywords

Fiber waveguides (42.81.Qb), Physical radiation damage (61.80.-x), Laser-beam impact phenomena (79.20.Ds), Glasses (81.05.Kf).

Submitted at: June 19, 2009
Accepted at: Feb. 27, 2010

Citation

G. MANN, M. JURKE, M. ZOHEIDI, M. EBERSTEIN, J. KRÜGER, Influence of core diameter and coating material on nanosecond laser-induced damage threshold of optical multimode fibers, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 3, pp. 711-714 (2010)