Fiber Couplers for FTIR Spectrometers Upgrade your benchtop FTIR spectrometer with our Mirror Couplers - and experience real-time process control! Transflection Fiber Probes Reflection Fiber Probes Metal-coated Fibers Metal coated fibers (Cu- and Al-) are the optimal solution for applications in high temperature, vacuum and harsh environment conditions. They are available in: