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News
Latest News
24 December 2025
Merry Christmas and a Happy New Year 2026 from art photonics!

If you look closely at our holiday card this year, you might notice a familiar tool in an unfamiliar setting. Yes, that is one of our probes in the wine glass! It is a little nod to who we are: even when we are celebrating, we never stop thinking about the science that brings us […]

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17 December 2025
Application Note: Monitoring Ethanol Evaporation in Mulled Wine using Fiber-Based MIR Spectroscopy

Believe it or not, Christmas 2025 is fast approaching. For many, the holiday season is synonymous with traditional markets and the comfort of a hot cup of mulled wine. However, there is a genuine scientific reason why you should never let your Glühwein boil, and it goes beyond simple culinary advice. In our latest Application […]

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Latest Events
19 January 2026
Team art photonics Arrives in San Francisco for SPIE Photonics West 2026

The art photonics GmbH team has arrived in California and is pleased to be back at the Moscone Center for the start of SPIE Photonics West 2026. Our delegation - led by CEO Dr. Stefanie Foerster, alongside Sales Manager Marco Antonio Ferreira Cipriano and Product Line Manager Joachim Gerike - is on-site and prepared for […]

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14 January 2026
SPIE Photonics West 2026 | 17-22 January 2026 | San Francisco, USA

art photonics GmbH is pleased to announce our participation in SPIE Photonics West 2026, the world's premier laser, photonics, and biomedical optics event. We invite you to visit us at Booth #1156 to discover why art photonics remains the partner of choice for remote sensing solutions across the entire UV-VIS-NIR-MIR spectral range. At this year's […]

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About Our Company
art photonics GmbH, founded in Berlin in September 1998, is one of the worldwide leaders in development and production of specialty fiber products for a broad spectrum from 300 nm to 16 µm. Unique technologies of Polycrystalline Mid InfraRed (PIR-) fibers and Metal coated Silica fibers are used for assembly of various spectroscopy probes for medical diagnostics and industrial process control, in volume production of fiber for medical and industrial lasers, for different fiber bundles, etc. Since January 2024 art photonics GmbH is a member of NYNOMIC GROUP.
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Mid-Infrared Spectroscopy for Monitoring of Anaerobic Digestion Processes - Prospects and Challenges

Posted on: 
27 March 2018

To develop an online probe that is not only sufficiently robust, but also able to measure crucial process variables in biogas plants is a tough challenge. Therefore, a mid-infrared (MIR) spectroscopic attenuated total reflection (ATR) probe and robust probe fitting were established. A fully automated probe control, calibration after probe cleaning, and analysis of the absorption spectra using machine learning were implemented in order to reduce maintenance of the probe to a minimum. The relevant wavelengths in the MIR spectrum for organic acids, total alkalinity, and ammonium nitrogen concentration were identified. Finally, intensive lab testing was carried out, followed by operation of the complete online measurement system at an industrial biogas plant. In order to improve signal strength and sensitivity, microelectronic mechanical system (MEMS)-based Fabry-Pérot interferometers were also investigated.

https://onlinelibrary.wiley.com/doi/full/10.1002/ceat.201500334

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