Laboratory setup
Laser system
Astrella, Coherent Inc.
For the most reasearch topics we use femtosecond laser system Astrella from Coherent Inc.
Daten
- Pulse duration 35 -200 fs
- Pulse energy, max. 7,5 mJ
- Pulse repetition rate single pulse - 1 kHz
- Wavelength 800 nm
- M² = 1,25
Topas Prime Plus, Light Continuum
In order to couple the optical energy of the laser radiation into matter we are able to change the wavelength from the UV to the mid IR of the radiation in order to control the absorption. We use an optical parametric amplifier (OPA) to do this.
Data:
- Wavelength regime 240 nm - 15 µm
- Pulse energy, maximal 500 µJ @ 500 nm
- Pulse duration, minimal 40 fs
Ellipsometer
In oder to detect the dynamics of laser-induced optical chagen of matter we set up an spatial and temporal resolved ellipsometer.
Data:
- Wavelength range 350 nm - 2,3 µm
- Angle range theta 50 - 90°
- Spatial resolution > 0,6 µm
- Temporal resolution > 60 fs
- Delay max. 6 ns
Postioning system
A positioning system by the company Areotech has been acquired for microstructuring using ultrafast laser radiation. Thereby all wavelenths emitted by our Astrella Laser system can be applied using refelctive optics.
Data
- Travel x-y-z 100x100x100 mm³
- Resolution 100 nm
- Bi-directional repetibility 100 nm
- Precision 400 nm
- Travel velocity 150 mm/s
Glovebox with Positioning system
A glove box is used, when processes are performed under exclusion of oxygen and vapor. Our glove box setup by teh company SylaTech allows to get through substrates with dimensions up to 200 mm length. An active gas cleaner regenertes the atmosphere reducing the oxygen and water conentration in the ppm regime. Laser radition can be guided through a sapphire window into the glove box and, by reflective optics the radiation is broght to a self-made positioning system using OWS axes. The radiation is tightly focused in to the µm regime using parabolic mirrors.
Data
- Travel x-y-z 100x100x100 mm³
- Resolution 1 µm
- Bi-directionale repetibility 3 µm
- Precission 4 µm
- Travel velocity 50 mm/s
mid-IR Attenuator
The attenuation of mid-IR laser radiation is a real challenge. We developed an attenuator based on reflection and allows us to attenuate computer-controlled the radiation power vom 0 to about 70% of the incoming radiation.
Achromatic autocorrelator
The pulse duration of our Astrella laser systems ist measured by a Grenouille. For the other wavelengths emitted an achromatic self-made autocorrelator is used. Ultrafast laser radiation from the UV to the mid-IR can be detected..
Data
- Wavelength regime 400 nm - 6 µm