High speed photodiode detector

 

1 Imported Hamamatsu company high-speed photodiode

 

          

 

2 Wavelength response range: 300nm ~ 1100nm

 

        

 

3 The detector material is silicon. The probe photosensitive diameter is less than 0.5mm. The default is free space light entering the probe. If you need it, you can attach the FC flange to the front of the probe so that the user can directly access the detector with fiber. Please explain in advance when purchasing, the default delivery detector does not have FC flange

 

           

 

4 Cutoff frequency: >1GHz

 

       

 

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

 

 

 

 

 

 

6 Output voltage range: 0-12V (when 12V voltage is supplied)

 

        

 

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

 

        

 

8 power supply voltage 9 ~ 24VDC

 

       

 

9 can be used to detect ultra-fast pulse lasers such as femtosecond or picosecond. It can also detect nanosecond laser pulses and quasi-continuous lasers of the us or ms level. It can also be used to directly detect the intensity of continuous or non-laser sources.

 

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

 

         

 

The following figure is a waveform diagram of the detection femtosecond oscillator: