Fiber to LN Cooled MCT Detector Couplers

Main Features:

  • Efficient coupling of fiber cable to MCT/ InSb detector installed inside LN-cooled Dewar with side window
  • Mirror optics enable work in broad spectral range
  • Pre-aligned and adjustable to maximize coupling efficiency
  • SMA or FC/PC (on request) adaptor for infrared fiber optical cable.
  • Compatible with Chalcogenide and Polycrystalline IR-Fiber Cables

Fiber optic coupling units are intended for the coupling of IR-fiber optical cables with SMA or FC/PC termination to MCT/ InSb detector installed inside LN-cooled Dewar with side window. The simplest lens coupler is a standard or customized construction fixed on the side window of LN-cooled Dewar.

Advanced version of the coupler is based on pre-aligned parabolic mirrors to eliminate chromatic aberrations and includes purging option to avoid atmospheric disturbance in spectral details of the object. Both simple- and advanced couplers are adjustable in 3 dimensions: X-Y for the mirror and Z – translation of the Dewar. See our Chalcogenide Fiber cables and Polycrystalline Fiber cables for different spectral range detectors and radiation sources.

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

Coupler Type Lens Coupler Mirror Coupler
Optical Elements ZnSe lens with 3-5 or 8-12μm AR-coating Two parabolic mirrors
Dimensions Diameter: 70 mm
Length: 61 mm
space for Dewar and
pre-amplifier included
Alignment options Angular translation stage ±2.5°
in both orthogonal axes;
Z-alignment ± 5mm
X-Y alignment of the mirror
inside the coupler,
Z-alignment – translation
of the Dewar.
Other options Purging is possible
  • Process control
  • Remote temperature sensing
  • Remote imaging