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Over a period of 35min with the laser diode at full power the wavelength stayed as expected within a 0.04nm broad band, which is well within the estimated measurement error of 0.1nm. The setpoint for the temperature control was set hereby to 15°C.
License
The hardware documentation is licensed under CERN OHL v.1.2.
The firmware is licensed under GPLv3.
For details see the license notes at https://github.com/Laser4DIY/TEC-Controller
Resources
The lastest version of the hardware and firmware can be found at https://github.com/Laser4DIY/TEC-Controller
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- Tobias Maximilian Gutmann. Open Source Nd:YVO4 Laser for Copper Ablation Studies. Master’s Thesis in Physics, Ludwig-Maximilians-Universität München, Faculty for Physics, 2018
TEC-Controller project page. http://hololaser.kwaoo.me/electronics/Arduino_TEC/Arduino-TEC.html, 2018
- Digikey Electronics. Trace width calculator. https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-pcb-trace-width, 2018
- Infineon. TLE7181EM datasheet. https://www.infineon.com/dgdl/Infineon-TLE7181EM-DS-v01_01-en.pdf?fileId=db3a30432f5008fe012f5440330e3991, 2010
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Copyright FabLab München e.V. 2018
Laser4DIY is sponsored by the Federal Ministry of Education and Research