San Francisco, USA / 02/04/2020 - 02/06/2020
Photonics West 2020
The technology field “Lasers and Optics” focuses on developing innovative laser beam sources and high quality optical components and systems. Fraunhofer's team of experienced laser engineers builds beam sources which have tailor-made spatial, temporal and spectral characteristics and ranging from μW to GW. These sources span a wide range of types: from diode lasers to solid-state lasers, from high power cw lasers to ultrashort pulse lasers and from single frequency systems to broadband tunable lasers.
Whether our customers are laser manufacturers or users, they do not only receive tailor-made prototypes for their individual needs, but also expert consultation to optimize existing systems. In general, the lasers and optics developed here can be applied in areas ranging from laser material processing and measurement engineering to illumination applications and medical technology.
Within the scope of satellite-based metrology, e.g. of gravitational waves or the gravitational field of earth, the fiber amplifier presented has been developed and confirmed TRL 5. The monolithic amplifier is seeded by an NPRO with a linewidth below 10 kHz. The output power is stabilized via pump diode modulation and achieves a RIN performance of < 0.01 / sqrt (Hz) between 0.001 to 10 Hz and a polarization extinction ratio of > 24 dB. Further SBS-free power scaling to > 10 W has been demonstrated.
The use of monocrystalline synthetic CVD diamond as an optical material provides unique potential for the future of high-power laser applications thanks to its extremely large refractive index, excellent thermal conductivity, high hardness and chemical resistance. In a cooperation between Fraunhofer ILT, IAF and IPT single-crystal diamonds with dimensions up to 7 x 7 mm² have been grown and processed into spherical and asperical lenses for beam guiding and forming.
Within the scope of the French/German Climate Mission MERLIN, a satellite-based LIDAR system will be used to measure the detailed global methane concentration. The transmitter consists of a Q-switched Nd:YAG laser and an optical parametric oscillator, which converts the laser wavelength to a methane absorption line at 1645 nm. Beyond the demonstration of the required output parameters the packaging concept has to fulfil the challenging stability aspects of a space mission.
High-power ultrafast lasers: The door to new applications swings open
Hans-Dieter Hoffmann, Fraunhofer ILT, Aachen (D)
Picosecond laser source at 3.4 microns for laser material processing of polymers
Sebastian Nyga, Fraunhofer ILT, Aachen (D)
Highly stable, high power hybrid fiber and Innoslab amplifier for narrow linewidth signals
Oliver Fitzau, Fraunhofer ILT, Aachen (D)
Fiber Bragg gratings in active multimode XLMA fibers for high-power kWclass fiber lasers
Sarah Klein, Fraunhofer ILT, Aachen (D)
High-precision ultrashort pulsed laser processing of metal foils using an advanced multibeam optic
Thilo Barthels, Fraunhofer ILT, Aachen (D)
Laser polishing using ultrashort pulse laser
Andreas Brenner, Fraunhofer ILT, Aachen (D)
High Power and high Precision Laser Manufacturing from UV to IR - State of Art and future challenges
Dr. Arnold Gillner, Fraunhofer ILT, Aachen (D)