Features

• Gigahertz High-Speed Response
• Small Size: 50 x 50 x 45 mm
• 400-1000 nm and 850-1650 nm Wavelength Ranges Available
• Continuously Adjustable Gain: 1x to 100x (ADP210)
• Continuously Adjustable Gain: 1x to 10x (ADP310)
• SM05 Compatible

APD Series Avalanche Photodiodes are semiconductor detectors designed to offer increased sensitivity and lower noise compared to standard PIN detectors. APDs have an additional semiconductor layer which creates an avalanche region with significantly larger electric field strength than in the depletion region of a PIN diode. This allows the initial electron-hole pair created by an absorbed photon to cause a cascade of electron-hole pairs via collisions with the semiconductor lattice. This effect increases sensitivity making APDs ideal for applications that require increased sensitivity, larger bandwidths, low leakage current, and low noise when compared to traditional PIN diodes. The APDs are also sensitive enough and fast enough for the characterization of nanosecond-pulsed solid-state lasers.

The APD210 provides exceptional performance for low-light applications in the 400-1000 nm range, while the APD310 covers the InGaAs range of 850-1650 nm. The APD maintains high gain stability over the 10-40°C operating temperature range by utilizing a temperature-compensation circuit that adjusts the ~150 VDC bias to ensure operation near the breakdown voltage. A 40 dB gain amplifier is integrated into the package and is AC-coupled to the output BNC. The output is matched to a 50 Ω impedance. The APD210 (APD310) detector has an electronic bandpass of 1-1600 MHz (1-1800 MHz) and offers a user-accessible potentiometer, thus leading to a continuous gain adjustment.

The APD Series has SM05 threads for easy integration into Thorlabs' entire family of lens tubes and cage assemblies. The bottom of the detector has a metric (M4) mounting hole and an M4 to 8-32 adapter for post mounting. The compact packaging allows the APD to be substituted directly into an existing setup while maintaining a small footprint on the bench top.

Support Documentation available for the APD210:

Description: High-Speed Avalanche Detector, 1000MHz, 400-1000nm

For applications that require greater sensitivity than can beattained with tradition PIN photodiodes, the ADP210 Avalanche Photodiodes can provide an extremely sensitive alternative. The ADP210 is sensitive enough fast enough for the characterization of pulsed solid-state lasers on the nanosecond scale. The APD210 silicon APD provides exceptional performance for low light level applications in the 400nm to 1000nm, offering a peak response (2.5 x 105 V/W @ 1000 MHz) near 800nm. The APD maintains high gain stability over the 0°C to 40°C temperature range by utilizing a temperature compensation circuit which adjusts the ~150 VDC bias to insure operation near the breakdown voltage. A 40dB gain amplifier is integrated into the package and is AC coupled to the output BNC. The output is matched to a 50-ohm impedance. The detector has an electronic band pass of 1MHz to 1000MHz and offers a user accessible potentiometer providing a 1x to 100x gain adjustment. The APD210 has SM05 thread for easy integration into Thorlabs' entire family of lens tubes and cage assemblies. The bottom of the detector has a metric (M4) mounting hole and an M4 to 8-32 adapter for post mounting. The compact packaging allows the APD to be directly substituted into an existing setup while maintaining a small footprint of the bench top. The unit comes with an external wall mounted +15VDC supply. Avalanche photodiodes (APDs) are semiconductor detectors designed to offer increased sensitivity and lower noise compared to standard PIN detectors. APD's have an additional semiconductor layer which creates an avalanche region with significantly larger electric field strength than in the depletion region of a PIN diode. This allows the initial electron-hole pair created by an absorbed photon to cause a cascade of electron-hole pairs via collisions with the semiconductor lattice. This effect increases sensitivity making ADPs ideal for low lightlevel applications. The resulting effect is a photodetector with increased sensitivity, larger bandwidths, low leakage current and low noise when compared to PIN diodes.