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The Global Market for Industrial Laser Processing
摘要： The Global Market for Industrial Laser Processing. Fiber laser revenues dictate total-industry negative performance in 2019. Global industrial laser revenues, over the period 2010 – 19, show a period of strong CAGR growth (11.5 %) led by the dynamic markets for high-power fiber lasers used in sheet metal cutting and a significant application for excimer lasers (smart phones). In 2019, global laser revenues decreased for only the first time since the recession of 2009, mainly for two reasons: unconstrained fiber laser selling price decreases and the maturation of the application for excimer lasers. Strong competition in the Chinese market – now more than 40 % of the world market – drove down the average selling price of industrial lasers by 17.5 % in 2019 while unit sales were up 6.5 % in the same period.
关键词： fiber laser,market revenues,excimer laser,industrial laser,CAGR
更新于2025-09-23 15:21:01
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Ablation of piezoelectric polyvinylidene fluoride with a 193 nm excimer laser
摘要： The unique flexible and piezoelectric properties of polyvinylidene fluoride (PVDF) films would allow for new applications for integrated bioelectronic devices. The use of these films has been precluded by the difficulty in machining them into small, discrete features without damaging the properties of the material. The etching of piezoelectric PVDF by means of a 193 nm excimer laser is explored and characterized. Etch rates are shown for common laser fluence values, along with images of the quality of the cuts to provide the reader with an understanding of the compromise between etch rate and edge roughness. The authors describe a novel method for the etching of piezoelectric, β-phase PVDF. While PVDF is flexible, acoustically matched to biological tissue, and has a wide resonance bandwidth, it is often overlooked as a piezoelectric material for micro-electrical-mechanical-system devices because of the difficulty in fabrication. In this paper, the authors characterize the etch rate and quality while using a 193 nm argon fluoride excimer laser for patterning.
关键词： excimer laser,etching,piezoelectric,ablation,PVDF
更新于2025-09-23 15:21:01
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Current review of Excimer laser Trabeculostomy
摘要： Background: Excimer laser trabeculostomy (ELT) is a microinvasive glaucoma surgery (MIGS) that creates multiple laser channels through the trabecular meshwork using a cold laser system, which minimizes tissue fibrosis and aids in bypassing the main area of resistance to aqueous outflow. The purpose of this review is to evaluate the current body of evidence surrounding ELT in terms of efficacy and review the safety profile of the procedure. Main text: Studies screened had to show clear inclusion and exclusion criteria as well as well-defined outcome measures. PubMed, MEDLINE, EMBASE and the Cochrane Controlled Trial Database were searched. Preferred Reporting Items of Systematic Reviews (PRISMA) guidelines were used to assess for study quality and for any bias. Sixty-four articles were initially identified with 18 meeting preliminary screening criteria. Ultimately, 8 studies met inclusion criteria and 2 additional non-referenced publications were also included: 1 randomized control trial, 4 prospective case series and 5 retrospective studies. Overall studies showed moderate intraocular pressure (IOP) lowering of between 20% and 40% from baseline without medication washout and mostly a decrease in glaucoma medications with few complications. Conclusion: Current literature shows a significant IOP-lowering effect of ELT with a favorable safety-profile in standalone cases or combined with cataract surgery. Limitations to these studies are the lack of controls and washout IOP. Overall, ELT is an attractive MIGS option that does not require any residual device remaining in the angle.
关键词： Excimer laser trabeculostomy,ELT,Trabeculotomy,MIGS,Cataract,Intraocular pressure,Glaucoma
更新于2025-09-23 15:21:01
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Nanostructuring of honeycomb-like polystyrene with excimer laser
摘要： This paper is aimed on the construction of honeycomb like patterns (HCP) with defined dimensions of pores on activated solid-state substrate. Dip coating technique with improved phase separation was used for pattern preparation, subsequent nanostructuring was realized with an excimer laser. Polystyrene patterns were prepared on perfluorethylenepropylene, which were subsequently treated with laser wavelength 248 nm. The main goal was to prepare honeycomb like pattern and by interaction of such microstructure with an excimer laser to prepare superposed structure. This idea was fully fulfilled, uniform micropattern on perfluorinated polymer was prepared, with several laser fluences and number of pulses to be tested subsequently. Optimal conditions of KrF exposure were determined to be 6000 pulses and interval of laser treatment from 8 to 16 mJ.cm?2, by this combination of input parameters a superposed globular nanostructure was constructed on honeycomb-like polystyrene microstructure. Surface wettability, morphology and chemistry of nanopatterned microstructures were changed significantly, oxygen concentration of treated substrates was significantly increased. Particular stages of globular pattern formation were studied and described in detail by atomic force microscopy, scanning electron microscopy, EDS/EDX and XPS analysis. Elemental mapping was applied for detailed analysis of prepared superposed pattern.
关键词： Excimer laser,Perfluorethylenepropylene,Polymer,Polystyrene,Honeycomb pattern,Nanostructure
更新于2025-09-23 15:19:57
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Efficacy and safety of 308-nm excimer lamp in the treatment of scalp psoriasis: a retrospective study
摘要： Background: Scalp psoriasis is a major therapeutic challenge due to the hindrance caused by hair. Treatment with the 308-nm excimer lamp is purported to provide many benefits over conventional phototherapy. This retrospective study evaluates the efficacy, safety, and effective dosage of 308-nm excimer light in the treatment of scalp psoriasis. Methods: We retrospectively reviewed the medical records of patients with scalp psoriasis who received treatment with 308-nm excimer light. Clinical and epidemiological data as well as details regarding treatment were statistically analyzed to determine the treatment outcomes. Results: Twenty patients with scalp psoriasis were included in the study. Their mean age was 47.45 ± 17.93 years. Eleven patients responded to treatment at the end of 10 sessions. The median baseline Psoriatic Scalp Severity Index (PSSI) was 12 (range, 3-32). At the end of the protocol, the median PSSI was 4.5 (range, 0-24), indicating a statistically significant reduction (P<0.001). Common adverse effects included erythema, irritation, and desquamation. Conclusion: The 308-nm excimer light appears to be an effective and safe modality that requires short treatment time. The modality could be considered as an alternative or adjuvant treatment for scalp psoriasis.
关键词： excimer lamp,scalp psoriasis,excimer light,excimer laser,phototherapy
更新于2025-09-19 17:15:36
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Nanosecond laser-induced surface damage and its mechanism of CaF2 optical window at 248a??nm KrF excimer laser
摘要： Calcium fluoride (CaF2) crystals is a kind of important optical material for ultraviolet (UV) and deep-ultraviolet (DUV) lithography and high-power laser-related applications. However, its laser-induced damage threshold (LIDT) directly affects the laser power, so that the above-mentioned applications could be limited. Therefore, the research on the damage characteristics and laser damage resistance of caf2 crystals is urgent. A 3D Finite-Difference Time-Domain (FDTD) method with Maxwell spinor equation is used, and the results show that the electric field intensity of rear surface is larger than that of front surface, which causes a lower threshold and is consistent with the experimental observations. And a thermo-mechanical coupled finite element model (FEM) of CaF2 with ce2o3 impurities, which are introduced by polishing process, has semiquantitatively described the damage mechanism of CaF2 by 248 nm-excimer laser.
关键词： laser-induced damage,FDTD,CaF2,FEM,ultraviolet excimer laser
更新于2025-09-19 17:13:59
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A comparative clinical trial to evaluate efficacy and safety of the 308‐nm excimer laser and the gain‐switched 311‐nm titanium:sapphire laser in the treatment of vitiligo
摘要： Background/purpose: Ultraviolet B (UVB) laser irradiation in a targeted manner is a reasonable treatment option for localized vitiligo. Recently, narrow‐band UVB gain‐switched 311‐nm titanium:sapphire lasers (TSL) were developed for the treatment of localized vitiligo. We aimed to compare efficacy, patient satisfaction, and safety between the conventional 308‐nm excimer laser (EL) and gain‐switched 311‐nm TSL in patients with vitiligo. Methods: The 13‐paired lesions from 10 patients who had small vitiligo patches were included in this prospective intra‐patient comparison trial. Each pair was randomly assigned to each laser treatment group and treated twice weekly for 12 weeks. The global photographic assessments by dermatologists, objective numerical assessments by imaging analyzer, and patient's satisfaction were used to evaluate the effectiveness. Adverse effects were also investigated at every visit. Results: All treated lesions showed improvement of about 50% after 12 weeks. There was no significant difference between EL‐ and TSL‐treated groups. Patient satisfaction and preference among the groups were also similar. Regarding safety, there were no serious adverse effects requiring cessation of the treatments; however, the severity score for persistent erythema (lasting >24 hours) was significantly lower in the TSL group than in the EL group. Conclusions: The gain‐switched 311‐nm TSL exhibited similar efficacy to the 308‐nm EL in treating vitiligo as well as improved safety. Therefore, the 311‐nm TSL is considered as a candidate device to replace the EL as a new and promising treatment option for localized vitiligo.
关键词： 308‐nm Excimer laser,gain‐switched 311‐nm titanium:sapphire laser,vitiligo
更新于2025-09-19 17:13:59
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TCT-665 Experience With Excimer Laser in Percutaneous Coronary Intervention With Indications, Procedural Characteristics, Complications, and Outcomes in a Large University Teaching Hospital
摘要： Excimer laser coronary atherectomy (ELCA) has been around since the early 1980s. Previous studies, although documenting high complication rates and restenosis, actually predate the introduction of the smaller 0.9-mm catheter, which is now in frequent use. We established the indications, procedural characteristics, complications, and outcomes of ELCA in a contemporary coronary interventional practice.
关键词： percutaneous coronary intervention,Excimer laser coronary atherectomy,acute coronary syndromes,coronary artery disease,ELCA,cardiogenic shock
更新于2025-09-19 17:13:59
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Excimer laser annealing method for achieving low electrical resistivity and high work function in transparent conductive amorphous In2O3:Zn films on a polyethylene terephthalate substrate
摘要： We have developed an excimer laser annealing method to achieve low electrical resistivity (ρ) and a high work function in amorphous In2O3:Zn (IZO) films on polyethylene terephthalate (PET) substrates. The effect of excimer laser irradiation of the films on crack formation, electrical properties (ρ, carrier concentration, and Hall mobility), and work function were investigated. KrF excimer laser irradiation produced cracks in the surface of the IZO films on PET as a result of thermal expansion of the PET substrate. By inserting an amorphous SiO2 layer as a heat barrier between the IZO layer and PET substrate, crack formation was prevented. Moreover, it was found that the work function of IZO film could be controlled by the laser fluence and repetition rate. Irradiation of a 150-nm-thick amorphous IZO film on a SiO2-coated PET substrate achieved a low ρ of 3.55 × 10?4 Ω cm and a high work function of 5.4 eV due to the reduction of oxygen and carbon while maintaining a flat surface.
关键词： Excimer laser annealing,Work function control,Buffer layer,Transparent conducting oxide
更新于2025-09-19 17:13:59
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Laser induced ultrafast combustion synthesis of solution-based AlO <sub/>x</sub> for thin film transistors
摘要： Solution processing of amorphous metal oxides using excimer laser annealing (ELA) has been lately used as a viable option to implement large-area electronics, offering high quality materials at a reduced associated cost and process time. However, the research has been focused on semiconductor and transparent conductive oxide layers rather than on the insulator layer. In this work we present amorphous aluminum oxide (AlOx) thin films produced at low temperature (≤150 °C) via combustion synthesis triggered by ELA, for oxide thin film transistors (TFTs) suitable for manufacturing flexible electronics. The study showed that combining ELA and combustion synthesis leads to an improvement in the dielectric thin film’s densification in a shorter time (≤15 min). Optimized dielectric layers were obtained combining a short drying cycle at 150 °C followed by ELA treatment. High breakdown voltage (4 MV cm?1) and optimal dielectric constant (9) was attained. In general, TFT devices comprising the AlOx fabricated with a drying cycle of 15 min followed by ELA presented great TFT properties, a high saturation mobility (20.4 ± 0.9 cm2 V?1 s?1), a small subthreshold slope (0.10 ± 0.01 V dec?1) and a turn-on voltage ≈0 V. ELA is shown to provide excellent quality solution-based high-k AlOx dielectric, that surpass other methods, like hot plate annealing and deep ultraviolet (DUV) curing. The results achieved are promising and expected to be of high value to the printed electronic industry due to the ultra-fast film densification and the surface/area selective nature of ELA.
关键词： thin film transistors,excimer laser annealing,solution processing,amorphous metal oxides,combustion synthesis,flexible electronics
更新于2025-09-19 17:13:59