To meet the demand of domestic customers for the full localization of high-speed detectors with amplification, Fiberwdm has launched a product with a bandwidth exceeding 20GHz. This series of high-speed detectors comes with built-in amplification and features extremely low noise. It can be used in high-speed communication systems and femtosecond laser system testing, making it a cost-effective, fully localized product. Fiberwdm has independently developed a linear power supply, which can fully meet the needs of high-speed detectors in scientific research applications.
High-speed detector with amplification
Performance Parameters
|
Model |
RD4020 |
|
Wavelength Range |
1000nm-1650nm |
|
3dB Cut-off Bandwidth |
20GHz |
|
Conversion Gain |
700V/W |
|
Saturation Optical Power |
10 mW |
|
Rise time(10%~90%) |
<20ps |
|
Typical Max. Responsivity |
>0.7A/W @1550nm |
|
Output Reflection Coefficient(S22) |
<-11dB |
|
Amplitude Flatness |
<±2dB |
|
Maxim Output |
0.5V |
|
Incident Power (Max) |
1mW |
|
Detector Material/Type |
InGaAs/PIN |
|
Operating Temperature |
-40℃~85℃ |
|
Optical Input |
FC/PC or FC/APC |
|
Electrical Output |
SMA or 2.92mm |
|
Power Supply Requirement |
+12V/100mA |
Figure 3-1 Summary of Electrical Performance
Notes:
Do not exceed 1mW for the maximum optical input power of the PD.
If the input is DC light, the optical power measured by the power meter is equal to the maximum optical power.
If the input is other types of light (e.g., pulsed light), the maximum optical power is calculated as the average optical power divided by the duty cycle. For example:
If the average optical power is 1mW and the duty cycle is 0.1%, the maximum optical power is 1W.
If the input is a square wave with a 50% duty cycle, the maximum optical power is 2mW.
If you are unsure whether the optical power will damage the detector, it is recommended to add an attenuator before the laser light enters the PD. First, minimize the light intensity, then observe the oscilloscope waveform, and gradually increase the optical power. The optimal condition is that the signal amplitude displayed on the oscilloscope does not exceed 500mVpp.

Figure 3-2 RD4020 Pulse Response Curve
High-speed detector mechanical dimension drawing

Figure 4-1 Mechanical dimensions diagram of the high-speed detector module

Figure 4-2 Mechanical dimensions of high-speed PD
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