Posted in | Optical Probe

ATR-Loop PIR-Fiber Probe

The ATR-Loop Infrared PIR-fiber probe, available from art photonics, is the first device in the FlexiSpec® product range to be developed for use with all Mid IR spectrometers, including FTIR.

The ATR-Loop PIR-fiber probes eliminate the need for sample preparation and are ideal for remote analysis of the composition of soft surfaces, pastes, and liquids. Within the FlexiSpec® product line, the loop fiber probe is the simplest device to facilitate affordable ATR-spectroscopy.


Specification of Fiber Optic ATR-Loop Probes FlexiSpec®
Probe type Chalcogenide-IR (CIR) Polycrystalline-IR (PIR)
Transmission range 6500 – 1700 cm-1 3600 – 600 cm-1
Fiber type Chalcogenide glass (As-S) Silver Halide (AgCl:AgBr)
Temperature range ≤ 90 °C ≤ 100 °C


Common Parameters of Fiber Optic Multi-Loop Probes FlexiSpec®
Total Length 1 m (opt.: PIR up to 5 m, CIR up to 10 m) *
Shaft Length 120 mm *
Shaft Diameter 10 mm
Shaft Material PEEK
Protective Tube Material PEEK
Input / Output Connectors Long SMA-905 (opt.: any other type)
Detachable PIR fiber Loop Loop; Multi-Loop (Double-, Triple-Loop)

*Customized dimensions are available on request.


  • In-vivo molecular spectroscopy for medical diagnostics by simply touching the tissues or skin with ATR-Loop
  • In-situ remote evanescent absorption (ATR) spectroscopy
  • Multiple ATR-spectroscopy by immersing the fiber loop in liquid

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