LISA Laser Products OHG

Katlenburg-Lindau, Germany

LISA Laser Products OHG

Katlenburg-Lindau, Germany
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Scholle K.,LISA Laser Products OHG | Lamrini S.,LISA Laser Products OHG | Adler S.,Fraunhofer Institute for Applied Solid State Physics | Holl P.,Fraunhofer Institute for Applied Solid State Physics | And 3 more authors.
2016 Conference on Lasers and Electro-Optics, CLEO 2016 | Year: 2016

We demonstrate for the first time to our knowledge a Q-switched Ho:YAG laser in-band pumped by a 1.9 μm semiconductor disk laser (SDL). 3.3 mJ of pulse energy were achieved in a compact setup. © 2016 OSA.


Grant
Agency: European Commission | Branch: FP7 | Program: CP | Phase: ICT-2011.3.5 | Award Amount: 10.64M | Year: 2012

In recent years it has become clear that mid-IR imaging spectroscopy has the potential to open a new chapter in bio-medical imaging and offers an effective tool for early cancer diagnosis and improved survival rates. Rather than a search for cancer marker absorption peaks, great progress has been made by analysing the entire bio-molecular mid-IR spectral signature using automated algorithms. However, the lack of suitable sources, detectors and components has restricted the technology to one of academic interest, based on weak thermal sources, low power lasers or synchrotron research tools.For the first time the photonic technology is in place to develop a new mid-IR technology platform on which entirely novel supercontinuum sources (c. 1000x brighter than thermal sources) covering the whole range from 1.5 to 12 m may be built:-Low loss robust chalcogenide fibres for fibre lasers, supercontinuum generation and delivery -Fibre end caps, splicing and fusion technology for soft glass fibres -Crystal technology and novel designs for mid-IR AO modulators based on calomel -Flexible fast AO driver technology to enable high speed HSI acquisition -Low cost T2SL FPA detectors with performance matching state-of-the-art MSL devices -2.9 m Er:ZBLAN and 4.5 m Pr-doped chalcogenide fibre laser pumps -Robust designs for a range of mid-IR SCG sources: a) 1.5-4.5 m from ZBLAN fibre b) 1.5-5.5 m from InF3 fibre c) 3-9 m from 2.9 m pumped PCF chalcogenide fibre d) 4-12 m from 4.5 m pumped step-index chalcogenide fibre.Two specific high impact applications will be addressed: high volume pathology screening (i.e. automated microscope-based examination of samples) and in vivo, remote, real-time skin surface examination (i.e. non-invasive investigation of suspected skin cancer).This project will open the mid-IR to further exploitation, and the technology developed will be transferable to a huge range of applications both in bio-photonics and in wider industry.


Grant
Agency: European Commission | Branch: FP7 | Program: CP | Phase: ICT-2007.3.5 | Award Amount: 3.92M | Year: 2008

The goal of this proposal is to develop advanced table-top solid-state photonic sources for a specific wavelength in the mid-IR spectral range, as a practical, reliable and cost-effective alternative to large-scale free-electron lasers (FELs), for an important application in biomedicine (health): minimally invasive surgery. Recent experiments have verified that the use of mid-IR FEL at wavelengths near 6.45 m, with a focused beam penetration depth comparable to the cell size and coupled both into the spectral wing of the water bending mode and the amide-II vibrational mode, results in tissue ablation with minimal collateral damage and very effective ablation rate. This finding is extremely important as a useful tool for minimally invasive human surgery. However, the clinical use of FEL is ultimately not viable due to large size, high cost, operational complexity and restricted access at a few million-dollar accelerator-based facilities worldwide. Several attempts to develop non-FEL alternatives have largely failed to meet the necessary requirements in terms of pulse energy and repetition rate. The main strategy in this project will be to exploit nonlinear optical techniques (OPO) in combination with novel near-IR laser pump sources (near 1 and 2 m) and new materials (e.g. orientation patterned GaAs) to obtain an unprecedented energy level (10 mJ) near 6.45 m at a repetition rate of 100 Hz (an average power of 1 W). Two basic approaches, differing in the time structure, will provide less than few s (macro) pulse duration. The project encompasses four distinct elements: (1) Material research; (2) Pump laser development; (3) OPO development; and (4) Validation in tissue ablation experiments. The partners, 4 companies and 5 institutes from 7 member states, with proven track record, extensive expertise, and complementary skills provide the critical mass and strong cohesion to achieve the goals of the project in the most successful, effective and timely manner.


Grant
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)


Lamrini S.,LISA Laser Products OHG | Lamrini S.,Ruhr University Bochum | Koopmann P.,LISA Laser Products OHG | Koopmann P.,University of Hamburg | And 3 more authors.
Applied Physics B: Lasers and Optics | Year: 2012

An efficient high-power Ho:YAG laser directly in-band pumped by a recently developed GaSb-based laser diode stack at 1.9 μm is demonstrated. At room temperature a maximum continuous wave output power of 55 W at 2.122 μm and a slope efficiency of 62% with respect to the incident pump power were achieved. For narrow linewidth laser operation a volume Bragg grating was used as output coupler. In wavelength stabilized operation a maximum output power of 18 W at 2.096 μm and a slope efficiency of 30% were obtained. In this case the linewidth is reduced from 1.2 nm to below 0.1 nm. Also spectroscopic properties of Ho:YAG crystals at room temperature are presented. © Springer-Verlag 2011.


Kubat I.,Technical University of Denmark | Agger C.S.,Technical University of Denmark | Moller U.,Technical University of Denmark | Seddon A.B.,University of Nottingham | And 12 more authors.
Optics Express | Year: 2014

We present numerical modeling of mid-infrared (MIR) supercontinuum generation (SCG) in dispersion-optimized chalcogenide (CHALC) step-index fibres (SIFs) with exceptionally high numerical aperture (NA) around one, pumped with mode-locked praseodymium-doped (Pr3+) chalcogenide fibre lasers. The 4.5um laser is assumed to have a repetition rate of 4MHz with 50ps long pulses having a peak power of 4.7kW. A thorough fibre design optimisation was conducted using measured material dispersion (As-Se/Ge-As-Se) and measured fibre loss obtained in fabricated fibre of the same materials. The loss was below 2.5dB/m in the 3.3-9.4μm region. Fibres with 8 and 10μm core diameters generated an SC out to 12.5 and 10.7μm in less than 2m of fibre when pumped with 0.75 and 1kW, respectively. Larger core fibres with 20μm core diameters for potential higher power handling generated an SC out to 10.6μm for the highest NA considered but required pumping at 4.7kW as well as up to 3m of fibre to compensate for the lower nonlinearities. The amount of power converted into the 8-10μm band was 7.5 and 8.8mW for the 8 and 10μm fibres, respectively. For the 20μm core fibres up to 46mW was converted. © 2014 Optical Society of America.


Lamrini S.,LISA Laser Products OHG | Lamrini S.,Ruhr University Bochum | Koopmann P.,LISA Laser Products OHG | Koopmann P.,University of Hamburg | And 3 more authors.
Optics Letters | Year: 2012

We report on the high-energy laser operation of an Ho:YAG oscillator resonantly pumped by a GaSb-based laser diode stack at 1.9 μm. The output energy was extracted from a compact plano-concave acousto-optically Q-switched resonator optimized for low repetition rates. Operating at 100 Hz, pulse energies exceeding 30 mJ at a wavelength of 2.09 μm were obtained. The corresponding pulse duration at the highest pump power was 100 ns, leading to a maximum peak power above 300 kW. Different pulse repetition rates and output coupling transmissions of the Ho:YAG resonator were studied. In addition, intracavity laser-induced damage threshold measurements are discussed. © 2012 Optical Society of America.


Lamrini S.,LISA Laser Products OHG | Lamrini S.,Ruhr University Bochum | Koopmann P.,LISA Laser Products OHG | Koopmann P.,University of Hamburg | And 2 more authors.
Optics Letters | Year: 2013

We report on a Q-switched Ho:Lu2O3 laser resonantly pumped by a GaSb-based laser diode stack at 1.9 μm. The maximum output energy extracted from the compact plano-plano acousto-optically Q-switched resonator was 8 mJ at a 100 Hz pulse repetition rate, while the peak power was 40 kW. The laser wavelength was 2.124 μm. © 2013 Optical Society of America.


Scholle K.,LISA Laser Products OHG | Lamrini S.,LISA Laser Products OHG | Gatzemeier F.,LISA Laser Products OHG | Koopmann P.,University of Hamburg | Fuhrberg P.,LISA Laser Products OHG
2013 Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference, CLEO/Europe-IQEC 2013 | Year: 2013

Solid state lasers operating in the eye-safe wavelength region around 2 μm can address applications in many different fields like medicine, remote sensing or plastic processing. By now mostly 2 μm thulium lasers are used, due to the possibility of diode pumping around 800 nm, but Ho-lasers offer several advantages. They have longer upper laser level lifetimes, higher emission cross sections and can operate at slightly longer wavelengths. Using in-band pumping also the thermal load inside the crystal is very low. For in-band pumping around 1900 nm typically Tm-doped fiber or solid state lasers are used [1]. Recently efficient in-band pumping of Ho:YAG with laser diodes was demonstrated [2]. © 2013 IEEE.


PubMed | LISA laser products OHG
Type: Journal Article | Journal: Optics letters | Year: 2013

We report on a Q-switched Ho:Lu2O3 laser resonantly pumped by a GaSb-based laser diode stack at 1.9 m. The maximum output energy extracted from the compact plano-plano acousto-optically Q-switched resonator was 8 mJ at a 100 Hz pulse repetition rate, while the peak power was 40 kW. The laser wavelength was 2.124 m.

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