NIST’s Spectral Comparator Facilities (SCF) offer specialized equipment for measuring the spectral power responsivity and uniformity of photodetectors across specific spectral ranges. The two main systems available are:
1. Vis/NIR SCF (Visible to Near-Infrared):
– Operates in the 350 nm to 1800 nm range
– Uses silicon photodiodes (350-1100 nm) and InGaAs photodiodes (700-1800 nm) as working standards
– Measures spatial uniformity of a detector’s power responsivity
– Automated translation stages position photodetectors
– Includes a 100 W quartz-halogen lamp, shutter, and monitor detector
2. UV SCF (Ultraviolet):
– Operates in the 200 nm to 500 nm range
– Uses UV enhanced silicon photodiodes as working standards
– Measures uniformity and spectral power responsivity of photodetectors
– Configuration and operation similar to Vis/NIR SCF, with a rotary stage used
– Currently supports measurement of only one test detector at a time
Both systems use monochromator-based setups for precise spectral measurements, with diagrams provided in the original documentation.
Source: https://www.nist.gov/laboratories/tools-instruments/spectral-comparator-facilities
Keywords: Quantum sensing, Quantum metrology, Quantum devices
