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Latest News
5 February 2026
Application Note: Measuring Ethanol and Methanol Mixtures with ATR Fiber Probes

In the high-stakes environment of complex chemical processing, the ability to distinguish and quantify components like ethanol and methanol in real-time is often the deciding factor between a strictly controlled reaction and an off-spec batch. Traditionally, operators have relied on manual extraction for laboratory analysis. However, this method introduces significant delays and safety risks that […]

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30 January 2026
How to Measure ATR Spectra Directly in Solution with Fiber Optic Probes

Moving Beyond the Bench: In-Line FTIR Monitoring with ATR Probes For decades, Attenuated Total Reflection (ATR) has been a standard technique for FTIR spectroscopy. However, most users are restricted to standard ATR inserts or benchtop accessories. While effective for static lab samples, these setups introduce a critical bottleneck: the sample must be extracted from the […]

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Latest Events
20 February 2026
EPIC Online Technology Meeting on Specialty Optical Fibers for Lasers | 23 February 2026 | Online

We are excited to announce that art photonics GmbH is taking the virtual stage on February 23, 2026, at the EPIC (European Photonics Industry Consortium) Online Technology Meeting on Specialty Optical Fibers for Lasers. Specialty optical fibers are the backbone of modern, high-performance laser systems. Whether driving industrial manufacturing, advanced sensing, or medical technology, the […]

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18 February 2026
PAT Connect 2026 | 10-11 March 2026 | Badenweiler, Germany

art photonics GmbH is pleased to announce our participation as an exhibitor at PAT Connect 2026, taking place this March at the TTC Technology Training Center. As industries increasingly shift toward real-time monitoring and automation, Process Analytical Technology (PAT) is more critical than ever. Taking the Spectrometer to the Sample Whether you are scaling up […]

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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.
Member Of:
UV 200-400 nm
Visible
Near IR 750-2500 nm
Mid IR 2.5 - 18 µm

Chalcogenide Mid-IR Fibers

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Main features:

  • High transmittance in the range 1.1 – 6.5 μm
  • Low optical losses of about 0.2 – 0.3 dB/m at 2.5 – 4 µm and 4.5 – 5 µm
  • Core/Clad structure with core diameters span from 8 to 340 μm
  • Double polymer coating for high flexibility

For more information see data and downloads available below.

Description

Chalcogenide As-S glass fiber transmits IR-radiation in the spectral range of 1.1 – 6.5μm. High performance CIR core/clad fiber are drawn with core diameters span from 8µm to 340µm.

Advanced drawing process with double polymer jacket provides a superior mechanical strength and high flexibility of CIR- fibers.

Low optical losses and small absorption peaks over the mentioned spectral range ensure a successful use of CIR-fiber for a wide range of applications.

For more information please visit our “Downloads” section and find relative articles at our “Publications” page.

Specs

Specification
Core/cladding composition
As2S3
Spectral Range 1.1 – 6.5 μm
Core Refractive Index 2.42
Fresnel Reflection Losses 31%
Attenuation at 3 – 4 μm & 4.5 µm – 5 µm 0.2 – 0.4 dB/m
Effective Numerical Aperture NA see Parameters of standard Chalcogenide fibers
Glass Transition Temperature, Tg 185 °C
Operating Temperature –273°C to +90°C
Core/Clad Diameter (standard) see Parameters of standard Chalcogenide fibers
Protective Jacket Fluoro polymer + PVC
Tensile Strength > 70 MPa
Minimum Bending Radius (fixed) 100x [Fiber Diameter]
Minimum Elastic Bending Radius 200x [Fiber Diameter]
Parameters of standard Chalcogenide fibers
Code Type Core, µm Cladding, µm Protective Jacket, µm NA Min. bending Radius, mm
CIR8/300 Step Index Singlemode 8 ± 1 300 ± 15 400 ± 20 0.25 ± 0.02 60
CIR50/250 Step Index Few-mode 50 ± 3 250 ± 10  410 ± 20 0.13 ± 0.02 50
CIR250/300 Step Index Multimode 250 ± 10 300 ± 15  400 ± 30  0.30 ± 0.03 60

Downloads

Graphs

Applications

  • Mid IR spectroscopy
  • Flexible IR pyrometry
  • Flexible IR-imaging Systems
  • Power delivery for Quantum Cascade Laser

Inquiry

Do you have any questions about this or any other product? Send us an inquiry, and our personnel will answer your question as soon as possible.

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