Heat accumulation effects in femtosecond laser-written waveguides with variable repetition rate.
By S. Eaton, Haibin Zhang, P. Herman, F. Yoshino, L. Shah, J. Bovatsek, A. Arai. Optics Express, 2005
767 citations recorded by the source corpus.
High-repetition rate femtosecond lasers are shown to drive heat accumulation processes that are attractive for rapid writing of low-loss optical waveguides in transparent glasses. A novel femtosecond fiber laser system (IMRA America, FCPA muJewel) providing variable repetition rate between 0.1 and 5 MHz was used to study the relationship between heat accumulation and resulting waveguide properties in fused silica and various borosilicate glasses. Increasing repetition rate was seen to increase the waveguide diameter and decrease the waveguide loss, with waveguides written with 1-MHz repetition rate yielding ~0.2-dB/cm propagation loss in Schott AF45 glass. A finite-difference thermal diffusion model accurately tracks the waveguide diameter as cumulative heating expands the modification zone above 200-kHz repetition rate.
Subfields: Ceramics and Composites, Computational Mechanics, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/e0fcf28ed2d12f4781f747862646651185f4018d
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In Computational Mechanics
Citations in the corpus
- Accumulation effects in laser ablation of metals with high-repetition-rate lasers (2008, background): “Experimentally, no cycling was observed in processing glass with lasers at the repetition rate exceeding 200 kHz [8].”
- A review of laser electrode processing for development and manufacturing of lithium-ion batteries (2018, unknown): “The local temperature increases linearly with the repetition rate, and even with femtosecond (fs)-laser radiation, values of about ΔT = 7000°C can be reached by using 1 MHz laser repetition rate and an accumulation of 20 laser pulses [56].”
- Control of the wetting properties of an AISI 316L stainless steel surface by femtosecond laser-induced surface modification (2012, background): “As v increases, thermal stresses induced by heat accumulation decreases [20].”