Femtosecond laser interaction with protection materials

Martin, Sven; Krüger, Jörg; Hertwig, Andreas; Fiedler, A.; Kautek, Wolfgang

doi:10.1016/s0169-4332(02)01392-2

Cited by 18 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Observation of the exposed region of the polymer jacket under the microscope revealed some damage to the jacket surface. Several femtosecond IR laser-based ablation studies of polymeric materials have shown that the threshold for induced index change and polymer ablation decreases with the number of incident pulses [42,43]. It is likely that the first several hundred pulses incident on the acrylate polymer coating are creating "incubation sites" that eventually reduce the transmission of the IR radiation through the jacket thus limiting the Δn growth.…”

Section: Writing Through the Fiber Jacketmentioning

confidence: 99%

Induced Bragg Gratings in Optical Fibers and Waveguides Using an Ultrafast Infrared Laser and a Phase Mask

et al. 2008

View full text Add to dashboard Cite

Since its development in 2003, the technique of Bragg grating inscription in optical fibers and waveguides with ultrafast infrared radiation and a phase mask has proven to be as simple as the standard UV-laser grating writing techniques but far more versatile. The ultrafast IR laser-based process allows for the creation of grating structures in glassy and crystalline materials that are not typically UV photosensitive. In this article, we will review the studies that have been performed at the Communications Research Centre Canada on the grating formation processes as well as applications of the ultrafast laser technique to fabricate gratings in various optical fibers and waveguides.

show abstract

Section: Writing Through the Fiber Jacketmentioning

confidence: 99%

Induced Bragg Gratings in Optical Fibers and Waveguides Using an Ultrafast Infrared Laser and a Phase Mask

et al. 2008

View full text Add to dashboard Cite

show abstract

“…For this purpose, the region of the cone that corresponded to the inferior thinned segment of the cornea was covered by gelatinous paper. The gelatinous paper is covered with aluminium foil, which is used in the industry due to its resistance and protection performance for femtosecond laser illumination, 10 the beam of which can travel in the transparent media and cause destruction to the tissue at a focused plane of predetermined distance, unlike the 196 nm excimer laser beam, which ablates the tissue it faces within a range of distances.…”

Section: Discussionmentioning

confidence: 99%

Intracorneal ring implantation using Intralase® with partial coverage of the cone in a patient after an alkaline injury

Çakir¹,

Utine²,

Baykara³

2011

OPTH

View full text Add to dashboard Cite

PurposeTo report the use of intracorneal ring segment (ICRS) implantation in a case of severe corneal thinning and irregularity secondary to alkali burn.Case reportA 33-year-old man who had a history of ocular alkali burn in the right eye was admitted. His best corrected visual acuity was 0.16 with manifest refraction of +5.00 (–7.00 × 180°). Orbscan II® revealed steepening of >53 D superiorly, excessive thinning inferiorly with thinnest pachymetric reading of 269 μm. Two KeraRing® segments, 200 μm thick and 90° arced, were implanted. During intrastromal channel creation by Intralase®, the inferior half of the applanating cone was covered by a gelatinous paper to prevent the penetration of the laser beam into the anterior chamber. In the first year postoperation, best corrected visual acuity was 0.7 with manifest refraction of +1.50 (–3.50 × 35°). Visante® opticial coherence tomography displayed ICRS at a depth of <370 μm.ConclusionICRS implantation with this novel approach may be an option in eyes with severe corneal irregularity and thinning.

show abstract

“…Observation of the exposed region of the polymer jacket under an optical microscope revealed some damage to the jacket at the fiber cladding-jacket interface, but no damage to the jacket surface. Several femtosecond IR laser-based ablation studies of polymeric materials have shown that the threshold for induced index change and ablation of the polymer decrease with the number of incident pulses [21,22]. It is likely then that the first several hundred pulses are inducing 'incubation sites' in the acrylate polymer coating that eventually reduces the transmission of the IR radiation through the jacket thus limiting the Δn growth.…”

Section: Through the Coating Fbg Inscription In Standard Telecom Fibermentioning

confidence: 99%

“…This reduction can be taken as a measure of the acrylate coating attenuation combined with the beam distortion through the coating as a result of the coating non-uniformity. In fs IR laser ablation studies of polymers, the damage threshold decreases with the number of incident pulses [22] The first several hundred pulses are likely inducing 'incubation sites' in the polymer coating that eventually reduces the transmission of the IR radiation through the jacket thus limiting the Δn growth.…”

Section: Bragg Gratings In Hydrogenated Acrylate Coated High Na Fibersmentioning

confidence: 99%

Through-the-jacket inscription of fiber Bragg gratings using femtosecond infrared radiation for sensor applications

Mihailov

Grobnic

Smelser

et al. 2009

Fiber Optic Sensors and Applications VI

View full text Add to dashboard Cite

Silica-based fiber Bragg gratings (FBG) sensors are versatile devices that are typically fabricated using UV laser exposure. As most standard optical fiber polymer coatings are highly absorbing in the UV, grating inscription typically requires the removal and reapplication of the protective coating by either chemical or mechanical means. Optical fiber stripping and recoating are time-consuming processes that can seriously degrade the mechanical integrity of the fiber. For high temperature sensor applications (> 200 °C), the optical fiber is coated in polyimide which is resistant to chemical attack. Invasive and hazardous techniques for its removal are required such as hot sulphuric acid stripping. In this paper, results of FBG inscription directly through the polymer coating of standard optical fiber with a femtosecond infrared laser and a phase mask are reviewed. Significant grating reflectivities are achieved along with improved mechanical reliability and performance at elevated temperatures. The only example of direct FBG inscription through polyimide coatings for high temperature stable grating sensors will also be presented.

show abstract

Femtosecond laser interaction with protection materials

Cited by 18 publications

References 8 publications

Induced Bragg Gratings in Optical Fibers and Waveguides Using an Ultrafast Infrared Laser and a Phase Mask

Induced Bragg Gratings in Optical Fibers and Waveguides Using an Ultrafast Infrared Laser and a Phase Mask

Intracorneal ring implantation using Intralase® with partial coverage of the cone in a patient after an alkaline injury

Through-the-jacket inscription of fiber Bragg gratings using femtosecond infrared radiation for sensor applications

Contact Info

Product

Resources

About

Femtosecond laser interaction with protection materials

Cited by 18 publications

References 8 publications

Induced Bragg Gratings in Optical Fibers and Waveguides Using an Ultrafast Infrared Laser and a Phase Mask

Induced Bragg Gratings in Optical Fibers and Waveguides Using an Ultrafast Infrared Laser and a Phase Mask

Intracorneal ring implantation using Intralase&reg; with partial coverage of the cone in a patient after an alkaline injury

Through-the-jacket inscription of fiber Bragg gratings using femtosecond infrared radiation for sensor applications

Contact Info

Product

Resources

About

Intracorneal ring implantation using Intralase® with partial coverage of the cone in a patient after an alkaline injury