Available Options
The 1621 Silicon Nanosecond Photodetector is similar to 350-1000 nm detectors with moderate gain and large bandwidth that many of us have built from scratch over and over again. It is ideal for use as a general purpose detector with Q-switched or CW lasers, and its large diameter and DC response make alignment easy. The user-switchable load resistor (50Ω or 10 kΩ) lets you optimize for response time or sensitivity. Choose a nanosecond response time with 50-V/A sensitivity, or a slower response time with a higher (10,000 V/A) sensitivity. The nanosecond rise time at the 50Ω load setting is fast enough to see your Q-switched pulses. Or use the 10-kΩ resistor setting for alignment purposes and for detecting lower-power pulses and cow light. We've even included an open-circuit setting so you can choose the best gain-bandwidth combination for your application. 8-32 mounting thread. M4 metric adaptor and tool now included.
feature | |
Conversion Gain, Maximum | 28 V/W |
Detector Diameter | 0.8 mm |
Detector Material | Silicon |
Detector Type | PIN |
Junction Capacitance | 3 pF |
Optical Input | Free Space |
Output Connector | BNC |
Output Impedance | 50 Ω, 10kΩ, & Open |
Power Requirements | Internal 9-V battery |
Responsivity | 0.55 A/W |
Rise Time | 1 ns |
Saturation Power | 5 mW |
Thread Type | 8-32 (includes M4 thread adapter) |
Wavelength Range | 350-1000 nm |