1. Introducing gigahertz-bandwidth photodetectors for the visible and near-IR spectral range that provide highest performance-to-price ratio available today! We offer 2-GHz Si detectors for the visible and 6-GHz InGaAs detectors for the near-IR spectral range.

2. TECHNICAL DATA ParameterVisible HSP-V2 detectorNear-IR HSP-IR6 detector Detector materialSiInGaAs Spectral range320-1100 nm900-1650 nm Detector diameter0.4 mm0.08 mm Bandwidth (-3 dB level)>2 GHz~6 GHz Rise and fall time<150 ps<70 ps Afterpulse ringing amplitude<20 % of maximum Dark current<0.005 nA @ 20 V<1.5 nA @ 20 V Junction capacitance~1 pF @ 20 V~0.3 pF @ 20 V NEP2×10 -15 W/√Hz Output impedance50 Ohm Peak input power200 mW100 mW Maximum output signal amplitude2 V Input fiber receptacleFC Battery power supply20 V Dimensions25.4×25.4×38.1 mm

3. 30040050060070080090010001100 0.1 0.2 0.3 0.4 0.5 Wavelength (nm) 0.6 0 Responsivity (A/W) Visible V-2 photodetector spectral and impulse response

4. 80010001200140016001800 0.01 0.1 1 10 Wavelength (nm) 0.001 Responsivity (A/W) Near-IR IR-6 photodetector spectral and impulse response

5. Typical measurement setup Light pulse is coupled into a delivery fiber Delivery fiber Photodetector Oscilloscope High-bandwidth adapter

6. OPERATIONAL INSTRUCTIONS Couple the light to be analyzed into a 50-  m delivery fiber. Keep the energy and power of the coupled radiation below the damage threshold of the fiber tip/volume. Attenuate the peak power of the optical pulse exiting the fiber to less than 100 mW. NOTE: if the photodetector input peak power is greater than 200 mW, the detector may be damaged and the warranty will not apply. Connect the photodetector to an oscilloscope using a high-bandwidth SMA adapter. Using cables or low-bandwidth adapters will significantly degrade the quality of measurement. Slowly insert the FC fiber connector into the photodetector fiber receptacle while watching the electrical signal on the oscilloscope. The maximum value of the signal must be lower than 2 V into 50 Ohm. Attenuate the input signal until the fiber connector can be completely inserted into receptacle without exceeding 2 V of output signal. Upon completion of measurements disconnect the fiber from the photodetector or block the fiber input from the radiation to prevent unnecessary battery drain. Always use protective plastic caps for the detector receptacles and fiber connectors.

7. 20 V battery pack Changing the battery pack: 1.Unscrew four #2-56 screws (one at each corner) that hold the battery pack and the electronic compartment together. SAVE THESE SCREWS. 2.Remove the old battery pack and discard it. 3.Attach a new battery pack with four #2-56 screws. The battery pack has 90º rotational symmetry. Align it to the electronics compartment in any orientation. Battery pack Electronic compartment #2-56 screws 1 Electrical contacts – DO NOT TOUCH! Four #2-56 screws – SAVE THESE! 2 3