New Room-Temperature Photodiodes for Middle-Infrared Range Released

LED Microsensor NT (Russia), manufacturer of middle-infrared light-emitting diodes and photodiodes (1.6 – 5.0 µm range) works hard on the improvement and expansion of its broad range of devices. Recently updated photodiode models with cut-off wavelength 4.6 µm (Lms43PD-03) were improved in A/W sensitivity and specific detectivity. They also possess the advantages of their predecessors, such as small dimensions, short response time, broad operation temperature range. All these properties make the LED Microsensor NT photodiodes a reliable base for sensing applications and primarily for detection of CO2, which has the strongest absorption band in 4.27 µm region.

Now these photodiodes are available with a built-in preamplifier (Lms43PD-03-PA models), which amplifies current generated by the photodiodes and converts this current into a voltage signal. Photodiode models with a preamplifier are equipped with a parabolic reflector and packaged in an aluminum tube for protection and screening. Parabolic reflector protects PD device from damage and increases that part of the radiation that reaches the sensitive area of the photodiode.

For further amplification, conversion and synchronous detection of the signals from photodiodes with preamplifiers, LED Microsensor NT developed the SDM synchronous detector. SDM synchronous detectors are made for optimal operation with LED Microsensor NT photodiodes with preamplifier and make the measurement easy and convenient.