1 Imported Hamamatsu high-speed photodiode

2 Wavelength response range: 300nm～1100nm

3 The detector material is silicon, and the photosensitive diameter of the probe is less than 0.5mm. The default is free space light entering the probe; if the user needs, an FC flange can be pasted on the front of the probe so that the user can directly connect the detector with an optical fiber. Please explain in advance when purchasing, the detector shipped by default does not have FC flange

4 Cut-off frequency: >1GHz

5 Rising edge: <300ps, falling edge: <500ps

6 Output voltage range: 0-12V (when powered by 12V voltage)

7 The internal output impedance of the detector is 1M ohm. If the user needs to obtain a suitable response speed, an appropriate resistance must be connected in parallel at the output end. If the detector wants to maximize the response frequency, its output must be connected in parallel with a 50-ohm resistor (generally, a 50-ohm terminal can be connected in parallel, and the oscilloscope with a bandwidth greater than or equal to 300MHz also has a 50-ohm impedance selection). The smaller the resistance connected in parallel at the output end, the higher the peak power of the incident optical signal is required, otherwise the output voltage will be lower, and the user needs to find a balance between bandwidth and voltage. Generally speaking, if the detection pulse width is hundreds of nanoseconds, picoseconds or femtosecond laser pulses, the output of the detector needs to be connected in parallel with a 50 ohm-100 ohm resistor; if the detector is 500us to 500ns laser pulse, the detector output needs to be connected in parallel with 1k -10k ohm resistance; if detecting a laser pulse of several hundred ms-500us, the detector output needs to be connected in parallel with a 10k-100k ohm resistor; if detecting more than 500ms or continuous laser, the detector output does not need a parallel resistance, but if the output voltage On the high side, or to eliminate the influence of natural light, a 100k resistor or potentiometer can be properly connected in parallel, one can reduce external noise, and the other can limit the range of the output voltage.

Note: The detector with amplification can be customized, which is divided into two types: A RF amplification (1MHz-100MHz); B weak signal amplification with adjustable gain

8 power supply voltage 9 ~ 24VDC

9 It can be used to detect ultrafast pulsed lasers such as femtosecond or picosecond, and can also detect nanosecond laser pulses and quasi-continuous lasers of us or ms level, and can also be used to directly detect the intensity of continuous laser or non-laser light sources

Shipping list: one photodetector, one 12V DC regulated power supply, for two pieces.