www.artphotonics.com > Products > Accessories for Mid IR Fiber Spectroscopy > Adjustable Coupler for MCT-Detector in LN-cooled Dewar

    Refocusing couplers for Dewar devices

    The meant for the coupling of IR-fiber optical cables with SMA termination to MCT/ InSb detector installed inside LN-cooled Dewar with side window.


    • The simplest lens coupler is a standard or customized construction which is fixed on the side window of LN-cooled Dewar and adjustable in 3 dimensions - X-Y for the lens & Z - for connector position.
    • 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 couplers have SMA-adaptor for infrared fiber optical cable with SMA-termination 
    • Two types of infrared cables can be provided for different spectral range detectors and lasers

    Specification of Dewar couplers

    Coupler Type Lens coupler Mirror coupler
    Optic elements ZnSe lens 3-5 or 8-12μm AR-coating Two parabolic mirrors
    Dimensions Diameter 55 mm Length 40 mm 150*120*100mm, space for Dewar and pre-amplifier included
    Alignment options Angular translation stage ±2.5° in both orthogonal axes; Z-translation stage ± 5mm X-Y alignment of the mirror inside the coupler, Z-translation of the Dewar
    Other options   Purging is possible