This single element detector is effective in sensing wavelengths between 200 nm and 1000 nm and 1000 nm and 1800 nm. This unit is a high performance photodiode/receiver operated with an ambient temperature with a dual gain FET input transimpedence amplifier. Please note that it is available in various sensor area sizes and has an available thermo-electric cooler for lower dark current and improved signal to noise. The output is an analog signal available through a BNC connector at the back of the detector housing. Since the signal is analog, an optional 12-bit and 16-bit data acquisition system and software is available to digitize its output into a computer. A DC power supply for this detector (sold separately) is also required. This detector is designed for use with scanning monochromators to capture the intensity of one wavelength at a time. An optional mount allows it to mate to any Sciencetech scanning monochromators. Sciencetech can also provide an optional custom mount for mating to non-Sciencetech monochromators and spectrographs. The output voltage is proportional to the input signal current: V_out = I_signal . R_f . The PD/AMP is a DC coupled dual gain system. Care should be taken in shielding the unit from stray light during operation to prevent saturation of the amplifier (and potential failure).

Technical Specifications

• Detector Type: 2.5 mm dia Si Photodiode ; 2 mm dia Ge Photodiode
• Operating Temperature: 22°C
• Operating Wavelength: 0.3 – 1.0µm ; 1.0 – 1.8µm
• Responsivity: 0.6 x 10⁸ / 0.6 x 10⁷V/W; 0.6 x 10⁷ / 0.6 x 10⁶V/W
• Noise: 1.2 x 10^-6 / 1.2 x 10^-7V/Hz^½ ; 4.0 x 10^-6 / 4.0 x 10^-7V/Hz^½
• Power Requirements: ± 9 VDC to ± 15 VDC
• Connections: Two shielded signal cables terminated with a BNC.
  Shielded power cable terminated with a DB-9 connector
  directly couples the unit with the PS-1 Low Noise Power Supply.