Solitary thermal shock-waves and optical damage in optical fibres

Hand, D.P. and Russell, P.St.J. (1988) Solitary thermal shock-waves and optical damage in optical fibres. In, IEE Colloquium on Non-Linear Optical Waveguides, London, GB,


[img] PDF
Download (164Kb)


Thermally-induced catastrophic optical breakdown is clearly of great importance for fiber-based laser-light delivery systems. Fiber core can be destroyed irreparably at rates of 1 m/s by breakdown that starts at a locally heated point and travels back towards the laser; that the damage tracks left behind are often elegantly uniform and periodic is only a slight recompense. Breakdown can occur at relatively modest intensities (we have recorded 2.8 mW/µm in a multimode fibre at blue/green wavelengths), and has been observed in many different fibres at both Ar+ and Nd:YAG laser wavelengths. We initiate the effect by heating the fibre with a small flame whilst the laser light is propagating within it. A solitary thermal shock-wave is created which propagates along the fibre towards the laser, leaving the core permanently damaged and unable to guide light. Associated with this shock-wave is a bright spot of side-scattered light which can be observed propagating along the fibre; for this reason we have named the effect the "fibre-fuse". Similar thermal shock-waves have previously been seen in gases ("laser-induced deflagration waves")

Item Type: Conference or Workshop Item (Paper)
Related URLs:
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions : University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 77587
Accepted Date and Publication Date:
2 June 1988Published
Date Deposited: 11 Mar 2010
Last Modified: 31 Mar 2016 13:12

Actions (login required)

View Item View Item

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics