Crack-free femtosecond laser processing of lithium niobate ...- femtosecond laser processing technique ,This work provides a simple method to efficiently suppress the defect formation induced by fs-laser in LiNbO 3 samples, paving the way for a new technique for high precision fs-laser processing. ACKNOWLEDGMENTS Femtosecond Laser Processing of AlN Ceramics for Gradient ...It drastically improves the stability and accuracy of the preparation process and it is a simple technique, which works on a broad range of processing materials and on the surface of complex structures. 23–25 In this study, the surface of an AlN ceramic with a gradient wettability surface was processed with a femtosecond laser. The effects of ...
MPLC elements are tested with 100W femtosecond laser source. Performance is not dependent on the wavelength, therefore MPLC technique is suitable for beam shaping of femtosecond pulses with wide spectral bandwidth while conserving all advantages of ultrashort laser sources.
A femtosecond laser (Ti: sapphire) with a central wavelength of 800 nm, a 1 kHz repetition rate and 100 fs pulse duration was used to grow Ge-Se thin films. The silicon substrates were cleaned thoroughly, first with deionised water at a temperature of 50 °C, then with acetone and isopropanol.
Abstract. Femtosecond laser direct writing is a promising technique for fabricating optofluidic devices since it can modify the interior of glass in a spatially selective manner through multiphoton absorption. The chemical properties of laser-irradiated regions in glass are modified allowing them to be selectively etched by subsequent wet ...
and processing techniques, as well as new applications already made possible by this technology. A schematic block diagram applicable to many of the current femtosecond pulse shaping methods is shown in Fig. 1. An input pulse from a femtosecond laser is directed to the pulse
MPLC elements are tested with 100W femtosecond laser source. Performance is not dependent on the wavelength, therefore MPLC technique is suitable for beam shaping of femtosecond pulses with wide spectral bandwidth while conserving all advantages of ultrashort laser sources.
The femtosecond laser was introduced in the U.S. in the early 1990s and developed by Dr. Kurtz at the University of Michigan. It was approved in 2001 by the U.S. Food and Drug Administration for use in laser-assisted in situ keratomileusis, or LASIK eye surgery. In LASIK, the femtosecond laser is used on the cornea to create a corneal flap.
Femtosecond-Laser-Assisted cataract surgery (FLACS) offers surgeons a reproducible, non-invasive technique to replace the least predictable and technically most demanding steps of conventional cataract procedures. A computer-guided laser linked to an optical imaging system (e.g. OCT) performs the corneal incision, capsulotomy, and lens fragmentation steps, thus changing the requirements ...
Recognizing that production of femtosecond lasers for micromachining is still slow and expensive, a team of researchers has developed an original parallel-processing technique that could multiply their production capacity, thus improving their performance, reducing the time and cost of manufacturing, and optimizing the use of laser energy.
Femtosecond laser systems for cataract surgery have been available since 2011. Studies have shown the possibility of creating a perfectly sized, shaped, centered, and strong anterior capsulotomy with this new technology. 7 We describe a technique that uses a femtosecond laser to create both anterior and posterior capsulotomies for cataract ...
microscope, and microsphere, are applied in femtosecond laser processing and the minimum nanostructure creation has been pushed down to ~25nm due to near-field effect. The most fascinating femtosecond laser precision engineering is the possibility of large-area, high-throughput, and far-field nanofabrication.
Figure 1 – Schematic processing comparison of microsecond to femtosecond lasers Figure 1 illustrates these effects on an application using a long pulse laser (for example, µs) compared to that of an ultra-short pulse laser like an fs laser. Femtosecond laser technology is not new; it’s been widely used in institutions and research centers
Since 2015, Coherent has offered a family of femtosecond fiber-MOPA-based laser products under the name MONACO. Average powers of up to 60 W, pulse energy of up to 80 µJ, and tunable pulse durations between 300 fs and 10 ps, plus easy access to burst mode operation, make the MONACO lasers the ultimate tool for ultrashort laser processing.
A femtosecond laser (Ti: sapphire) with a central wavelength of 800 nm, a 1 kHz repetition rate and 100 fs pulse duration was used to grow Ge-Se thin films. The silicon substrates were cleaned thoroughly, first with deionised water at a temperature of 50 °C, then with acetone and isopropanol.
Keywords: Femtosecond laser, fiber laser, micro-processing, nano-processing, direct writing. 1. INTRODUCTION In recent years, methods of micro and nano-processing of materials by direct femtosecond (fs) laser irradiation have aroused great interests in the field of material processing and have become an attractive option for high quality material
Femtosecond laser micromachining is an advanced technique used to fabricate two- and three-dimensional (2D/3D) structures on the sub-micrometer scale. It’s one of the most advanced methods of laser processing currently available, using femtosecond pulses of laser light to initiate material ablation in extremely accurate focal points.
It drastically improves the stability and accuracy of the preparation process and it is a simple technique, which works on a broad range of processing materials and on the surface of complex structures. 23–25 In this study, the surface of an AlN ceramic with a gradient wettability surface was processed with a femtosecond laser. The effects of ...
Application of femtosecond laser pulses for microfabrication of transparent media
The femtosecond laser is able to perform four of the steps related to cataract surgery: (1) the corneal incisions (main incision and side ports), (2) incisions into the peripheral cornea to reduce astigmatism, (3) the capsulorhexis, and (4) the initial fragmentation of the crystalline lens.
In recent years, femtosecond laser direct micro/nanowriting technology has been widely adopted in the field of micro/nanomanufacturing (Figure 2d) [92]. Due to its extremely short pulse width, a...
Femtosecond laser materials processing using a digital micromirror device. We present the results of our work using a Texas Instruments digital multimirror device (DMD: a pixelated programmable mirror array) for applications in femtosecond materials processing. Unlike other techniques such as electron beam lithography or focussed ion beam ...
Based on this system, we propose a laser cleaning method whose novelty is the use of a shaped beam generated with a holographic laser processing technique [16, 17] as a removal beam. In addition, the removal beam is radiated onto the target material together with a processing beam; in other words, the laser cleaning is performed during laser ...
A femtosecond laser (Ti: sapphire) with a central wavelength of 800 nm, a 1 kHz repetition rate and 100 fs pulse duration was used to grow Ge-Se thin films. The silicon substrates were cleaned thoroughly, first with deionised water at a temperature of 50 °C, then with acetone and isopropanol.
Direct Laser Writing (DLW) employing high repetition rate femtosecond, 1 picosecond 2 pulses (or even CW lasers 3,4 ) as an additive manufacturing (AM) technique has evolved rapidly during the ...
Although the machining of high explosives is a rather esoteric application of femtosecond laser machining, it illustrates in dramatic fashion the advantages that can be obtained. We have used femtosecond lasers to drill and cut a wide variety of material with equally good results.
