A turn-key cryogenic superconducting bolometer detector system

We describe a complete, commercially available, cryogen-free superconducting bolometer detector system. This allows detection of Terahertz radiation at frequencies from 0.1 to 20 THz, with a system optical NEP of ~ 3 pW Hz^-1, a useful modulation frequency range from 5 Hz to > 1 kHz and a linear dynamic range over 60 dB. The range of detection frequencies can be precisely defined using metal mesh filters. The system is entirely self-contained and requires only an electrical supply in order to operate. Continuous operation is possible for a period of several months or even longer.