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Disclosed is a UV-visible laser system having ultrashort pulses with high power and/or high energy. The laser system includes at least one non-linear optical crystal (1) adapted for receiving two distinct ultrashort laser pulses (31, 32) in the visible or infrared domain emitted respectively by two distinct laser pulse sources (11, 12) and a temporal synchronisation unit (41, 42) adapted so that the two ultrashort laser pulses (31, 32) are superimposed in time and space in the non-linear optical crystal (1) with any phase shift, and generate, by sum frequency, an ultrashort laser pulse (131) having an optical frequency equal to the sum of the respective optical frequencies of the two distinct laser pulses (31, 32).

The present invention relates to a UV-visible laser system having ultrashort high-power and/or high-energy pulses. According to the invention, the laser system includes at least one non-linear optical crystal (1) suitable for receiving two separate ultrashort laser pulses (31, 32) in the visible or infrared domain, respectively emitted by two separate sources of laser pulses (11, 12), and time-synchronisation means (41, 42) adapted such that said two ultrashort laser pulses (31, 32) overlap in time and space in said non-linear optical crystal (1) with a given phase shift, and generate, by sum frequency, an ultrashort laser pulse (131) having an optical frequency equal to the sum of the respective optical frequencies of the two separate laser pulses (31, 32).

Agency: European Commission | Branch: FP7 | Program: CP | Phase: FoF.NMP.2010-3 | Award Amount: 3.39M | Year: 2010

FEMTOPRINT is to develop a printer for microsystems with nano-scale features fabricated out of glass. Our ultimate goal is to provide a large pool of users from industry, research and universities with the capability of producing their own micro-systems, in a rapid-manner without the need for expensive infrastructures and specific expertise. Recent researches have shown that one can form three-dimensional patterns in glass material using low-power femtosecond laser beam. This simple process opens interesting new opportunities for a broad variety of microsystems with feature sizes down to the nano-scale. These patterns can be used to form integrated optics components or be developed by chemically etching to form three-dimensional structures like fluidic channels and micro-mechanical components. Worth noticing, sub-micron resolution can be achieved and sub-pattern smaller than the laser wavelength can be formed. Thanks to the low-energy required to pattern the glass, femtosecond laser consisting simply of an oscillator are sufficient to produce such micro- and nano- systems. These systems are nowadays table-top and cost a fraction of conventional clean-room equipments. It is highly foreseeable that within 3 to 5 years such laser systems will fit in a shoe-box. The proposal specific objectives are: 1/ Develop a femtosecond laser suitable for glass micro-/nano- manufacturing that fits in a shoe-box 2/ Integrate the laser in a machine similar to a printer that can position and manipulate glass sheets of various thicknesses 3/ Demonstrate the use of the printer to fabricate a variety of micro-/nano-systems with optical, mechanical and fluid-handling capabilities. A clear and measurable outcome of Femtoprint will be to be in a situation to commercialize the femtoprinter through the setting-up of a consortium spin-off. The potential economical impact is large and is expected in various industrial sectors.

Agency: European Commission | Branch: H2020 | Program: RIA | Phase: ICT-27-2015 | Award Amount: 4.44M | Year: 2016

Driven by the end-users requirements and needs, the main objective of the HIPERDIAS project is to demonstrate high throughput laser-based manufacturing using high-power, high-repetition rate sub-1ps laser. Although the laser system to be developed within HIPERDIAS can address other material processing applications, the focus here will be 3D structuring of silicon at high-speed, precision processing of diamond material and fine cutting of metal for the watch and the medical industry. Chirped Pulse Amplification (CPA) approach based on highly efficient compressors gratings will be implemented in order to minimize the overall losses of the laser system. The final targets of the project are to demonstrate:- a 10-times increase of ablation rate and productivity of large area 3D-structuring of silicon - a 10 times increase of speed in fine cutting metals - an increase of process speed (6-10 times) at a low processing tools cost of diamond machining Therefore, the laser parameters, as well as the beam shaping, beam guiding (based on Kagom fibers) and machine systems will be developed and optimized to fulfill the above manufacturing targets. The laser architecture will be based on fully passive amplifier stages combining hybrid (fiber-bulk) amplifier and thin-disk multipass amplifiers to achieve sub-500fs at an average output power of 500W and sub-1ps at an average output of 1kW, at a repetition rate of 1-2 MHz. Furthermore, second harmonic generation (SHG, 515 nm) and third harmonic generation (THG, 343 nm) will be implemented to allow processing investigation at these wavelengths. At 515 nm (respectively 343 nm) an average power of >=250W (respectively>=100W) shall be demonstrated.

Agency: European Commission | Branch: FP7 | Program: BSG-SME | Phase: SME-2012-1 | Award Amount: 1.41M | Year: 2012

FLAME will leverage a current revolution in ultrafast laser science and lead to the commercial availability of amplified laser systems with significantly higher pulse repetition rates, higher average powers and shorter pulse durations than has been possible up to now. In addition, the project will develop sophisticated ion and electron imaging detectors tailored to the experimental research carried out with the novel laser systems. Work to be performed by the RTD teams will be carried out in three directions: Development of a high power and high speed extremely short pulse (<10fs) laser source and a tunable visible high power and high speed ultrafast laser source. Development of dedicated detection instrumentation that maximizes the benefits that can be obtained from working with these laser sources The technology that will be developed in the project offers One-two orders of magnitude higher repetition rates, one order of magnitude shorter pulse durations and higher average powers than commercially available laser amplifiers, existing fiber lasers or few-cycle oscillators A multi-dimensional detection apparatus tailored to ultrafast laser pulse characterisation with an improvement in signal quality by an order of magnitude The FLAME consortium consists of 4 SME participants and two leading research centers as RTD participants. The SME participants are today already present in the ultrafast market, or as providers of characterization/detection equipment. They are in an excellent position to offer new products shortly after the completion of the project. The path for exploitation of foreground in the FLAME project will follow the model generally leading to wide industrial acceptance of new laser technologies: Develop a solid technology base from the research carried out in the project Leverage this technology base for a rapid access to fast growing scientific markets Build on the relationship with scientific customers to develop new industrial markets Short term scientific applications include attosecond research and time-resolved spectroscopy, while mid-term industrial applications include materials science and semiconductor metrology.

Agency: European Commission | Branch: H2020 | Program: RIA | Phase: ICT-29-2016 | Award Amount: 4.00M | Year: 2017

More than 450.000 people are diagnosed with esophageal cancer (EC) each-year worldwide and approximately 400.000 die from the disease. Esophageal cancer is the eighth most commonly diagnosed cancer, but it is the sixth leading cause of cancer-related death, with incidence rates steeply rising. Risk factors, including gastroesophageal reflux disease and Barretts esophagus, may diagnostically implicate more than 300 million people worldwide. Nevertheless, the disease is detected late due to limitations in current diagnostic procedures leading to adverse prognosis and high treatment costs. ESOTRAC will change the landscape of esophageal diagnosis, over existing methods, based on cross-sectional optoacoustic and optical coherence endoscopy. The dual-modality system delivers a set of early-cancer imaging features necessary for improving early diagnosis, saving lives and leading to 3-5 Billion annual savings for the healthcare system. OCT provides micron scale subsurface morphological information based on photon scattering and optoacoustics provides deeper penetration and complementary pathophysiological features based on photon absorption. ESOTRAC develops novel photonic components (light sources, optical/optoacoustic scopes) and innovates novel medical system designs. Then, it performs pilot studies to investigate the functionality of the new endoscope and deliver a novel imaging-feature portfolio offering improved and earlier diagnosis. A central ESOTRAC ambition is that the new endoscope will become the new EC diagnostic standard by enabling quantitative and label-free three-dimensional endoscopy of early cancer with tremendous potential to impact esophageal care. ESOTRAC leverages European investment and know-how and strengthens the prospects of economic growth by leading the market position in endoscopic imaging.

Agency: European Commission | Branch: FP7 | Program: CP | Phase: FoF-ICT-2013.7.2 | Award Amount: 14.79M | Year: 2013

LASHARE will develop a robust assessment framework for innovative laser equipment paving the way for new manufacturing applications. It will carry out a large number of assessment experiments for a variety of laser equipment targeting strategic manufacturing areas for Europe.\nThe Laser Equipment Assessment (LEA) will be carried out by a trio of research/supplier/user partners. Each LEA will define requirements and metrics for development / improvement and perform validation in a production like environment. The LEAs will aid innovative laser equipment and new processes/applications to get into the market by accelerating the transition from lab-proven or prototype to real manufacturing applications. The LEAs will also facilitate the transferability of technology to additional applications and markets and will be based on an established metric for the evaluation of Technology Readiness Levels.\nLASHARE brings together the know-how and resources of 6 of the EUs most renowned laser research centres along with equipment suppliers and industrial users. 14 LEAs are included at project start and 8-12 additional LEAs added through a competitive call. LASHARE will focus on SMEs enabling them to create new products to benefit European industry. In total, more than 30 SME partners will benefit from FP7-FOF support, expertise from research centres, and the direct collaboration with industrial users that will create trust and thrust for adoption.\nCompetence Centres will be key for dissemination of information and best practices, promoting use of laser equipment and expansion of results to other application sectors. They will provide advice, support and training targeting SME and industry suppliers and users.\nThe benefit of LASHARE will be\n accelerated introduction of innovative European laser equipment in strategic manufacturing lines\n strengthened competitive position of European SME laser suppliers (new markets), and industrial users (increased manufacturing efficiency)

Agency: European Commission | Branch: H2020 | Program: IA | Phase: FOF-13-2016 | Award Amount: 4.43M | Year: 2016

Roll-to-roll manufacturing is well established in many segments like electronics, micro manufacturing or solar technology. Continuous roll-to-roll manufacturing processes can be integrated with various manufacturing steps within the production line. While many conventional and laser manufacturing techniques could already be embedded successfully into roll-to-roll machines, pulsed laser structuring could not be adapted sufficiently. The main obstacles are insufficient pulse repetition rate levels with required pulse energy and beam deflection speed and accuracy. The PoLaRoll project aim is to bring together current developments and fully integrate a high speed ultra-short pulse laser ablation process into a roll-to-roll machine fulfilling the requirements of individualised laser-based mass production. Various disciplines are in focus of the PoLaRoll project: A femtosecond laser will be developed with high pulse energy at extremely high pulse rates. Innovative polygon scanner technology for ultra-fast beam deflection is advanced in speed and accuracy and a dual polygon scanner will be developed enabling simultaneous laser structuring of top and bottom face of web material. An in-line metrology method will be developed enabling process monitoring and control. Highly sophisticated methods will be developed and applied enabling the synchronisation of the ground-breaking ultra-fast processing sub-systems. To prove the PoLaRoll process performance a target application has been selected, which is solar shading of glass facades. The laser formed micro structures geometry allows cutting the solar radiation and therefore reduces the energy used for cooling and ventilation. The PoLaRoll laser structuring module will be integrated into a prototypical modular designed roll-to-roll machine as well as in a conventional machine for mass production operated by the industrial end-user. Thus the PoLaRoll project will be able to revolutionise the current state of the art in digital roll-to-roll processing.

Amplitude Systemes and Ecole Polytechnique - Palaiseau | Date: 2012-07-11

A method and passive device for the coherent combination of two amplified and/or spectrally broadened optical beams using at least one bidirectional optical component (A1, A2), the device includes an amplitude division ring interferometer having optical splitting and recombining elements disposed so as to receive an incident optical beam (S_(0)) and to split it spatially into a first secondary input beam (H_(1)) and a second secondary input beam (H_(2)), optical guiding elements disposed so as to define an optical path in the form of a ring in the interferometer, the at least one bidirectional optical component being disposed on the optical path of the ring interferometer, the splitting and recombining elements being disposed in such a way as to receive and to recombine spatially, temporally and coherently the first secondary output beam (H_(1)) and the second secondary output beam (H_(2)), so as to form a coherent output beam.

A system and method for generating a burst of ultra-short, high-power laser pulses, the system includes elements for generating laser pulses having a repetition period 1, amplification elements including an optical amplifier medium, a regenerative optical cavity, elements for injecting the laser pulses into the regenerative optical cavity, and elements for extracting the laser pulses from the regenerative optical cavity. The regenerative optical cavity has a total length such that the duration of a round trip of each pulse is between N1 and N times the period 1, wherein N is an integer higher than or equal to 2, the injection elements are adapted for trapping a burst of N laser pulses in the regenerative optical cavity, the extraction elements are suitable to extract the burst of N laser pulses from the regenerative optical cavity, and the optical amplifier medium is suitable for forming a burst of amplified laser pulses.

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