High-speed fiber optic photodiode detector

 

1 Detector material: InGaAs

 

 

 

2 Wavelength response range: 1100nm ～ 1650nm

 

3 Peak response wavelength: 1300nm

 

 

 

4 Saturated optical power: 6dBm (at room temperature 25 degrees)

 

5 Cutoff frequency:> 2GHz

 

6 Rising edge: <200ps

 

7 Falling edge: <200ps

 

8 The output impedance inside the detector is 1M ohm. If the user needs to obtain a suitable response speed, a suitable resistor must be connected in parallel at the output. In order for the detector to maximize its response frequency, 50 ohm to 100 ohm resistors must be connected in parallel at its output (generally 50 ohm terminals can be connected in parallel, and an oscilloscope with a bandwidth greater than or equal to 300 MHz also has a 50 ohm impedance option). The smaller the parallel resistance at 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 bandwidth and voltage. Generally speaking, 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 ohms to 100 ohms. If the detector has a laser pulse of 500us to 500ns, the detector output needs to be connected in parallel with 1k -10k ohm resistance; if detecting laser pulses of hundreds of ms-500us, the output end of the detector needs to be connected in parallel with 10k-100k ohm resistance; if detecting more than 500ms or continuous laser, the detector output end does not need parallel resistance, but if the output voltage If it is too high, or to eliminate the influence of natural light, a 100k resistor or potentiometer can be connected in parallel, one can reduce the external noise, and the other can limit the amplitude of the output voltage.

 

 

For the relationship between bandwidth and response speed, parallel resistance and voltage, please refer to the English introduction on the picture above.

 

 9 Optical input interface: Standard FC fiber connector with optical fiber

 

10 Supply voltage 9 ～ 24VDC