Nanosecond laser-induced surface damage of optical multimode fibers and their preforms |
| |
Authors: | Guido Mann Jens Vogel Rüdiger Preuß Pouya Vaziri Mohammadali Zoheidi Markus Eberstein Jörg Krüger |
| |
Institution: | 1.Division VI.4 Surface Technologies,BAM Federal Institute for Materials Research and Testing,Berlin,Germany;2.Division V.4 Advanced Ceramics,BAM Federal Institute for Materials Research and Testing,Berlin,Germany;3.FiberTech GmbH,Berlin,Germany |
| |
Abstract: | High-power optical multimode fibers are essential components for materials processing and surgery and can limit the performance
of expensive systems due to breakdown at the end faces. The aim of this paper is the determination of laser-induced damage
thresholds (LIDT) of fibers (FiberTech) and preforms (Heraeus Suprasil F300). Preforms served as models. They were heated
up to maximum temperatures of 1100, 1300 and 1500°C and cooled down to room temperature at rates of 10 K min−1 (oven) and ∼105 K min−1 (quenched in air) to freeze in various structural states simulating different conditions similar to a drawing process during
the production of fibers. Single- and multi-pulse LIDT measurements were done in accordance with the relevant ISO standards.
Nd:YAG laser pulses with durations of 15 ns (1064 nm wavelength) and 8.5 ns (532 nm) at a repetition rate of 10 Hz were used.
For the preforms, LIDT values (1-on-1) ranged from 220 to 350 J/cm2 (1064 nm) and from 80 to 110 J/cm2 (532 nm), respectively. A multi-pulse impact changed the thresholds to lower values. The LIDT (1064 nm wavelength) of the
preforms can be regarded as a lower limit for those of the fibers. |
| |
Keywords: | PACS" target="_blank">PACS 52 38 Mf 79 20 Ds 42 81 Qb 64 70 P- 81 05 Kf |
本文献已被 SpringerLink 等数据库收录! |
|