FEMTO PWPR-2K picowatt photoreceiver series with switchable gain (109 V/A, 1010 V/A) and a bandwidth from DC to 2 kHz is suitable for CW measurements, time resolved signal acquisitions, and highly sensitive modulated measurements.
Features include ultra-low noise and NEP ≤ 10 fW/√Hz. Si and InGaAs models cover the wavelength range from 320 nm to 1700 nm. In addition to precise and fast CW measurements, the relatively large bandwidth from DC to 2 kHz also allows time-resolved and modulated measurements. Particularly the combination with lock-in amplifiers results in ultra-sensitive measurement systems being almost immune to disturbances from external sources. In this way the PWPR-2K can easily detect optical powers from about 100 fW up to 10 nW. For specs and revelations, peruse the PWPR-2K datasheet.