This single element detector is effective in sensing wavelengths between 800 nm and 1700 nm. This unit is a high performance photodiode/receiver operated with at 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).
Higher Bandwidth Version
The standard detector can detector signal frequencies from DC to approximately 500-2kHz. This can be increased to 3MHz but gain would be sacrificed. If your application requires the measurement of high frequency signals, please inform a Sciencetech Applications Sales Specialist (sales@sciencetech-inc.com) who can provide you with a custom quotation.
Technical Specifications

• Shunt resistance: 250kΩ min ; 500kΩ typ
• Shunt capacitance: 2000pF
• Responsivity: 0.9A/W @ 1.3 µm