How to test the attenuation of fiber jumpers?

Hello！

You need to check the pigtail with optical power meter and light source

1. Turn on the optical power meter, set the unit of the optical power to dBm, and set the operating wavelength of the meter to 1550 nm.

2. Connect one end of a known-good fiber jumper to the light source.

3. Connect the other end of the known-good fiber jumper to the optical power meter.

4. Enable the laser of the light source that is connected to the fiber jumper.

5. Measure the transmit optical power P1 of the light source by using the optical power meter.

6. Disconnect the two ends of the fiber jumper.

7. Connect one end of the tested fiber jumper to the light source.

8. Connect the other end of the tested fiber jumper to the optical power meter.

9. Measure the transmit optical power P2 of the light source by using the optical power meter.

If the difference between P1 and P2 is less than 1 dB, it indicates that the fiber connection is normal.

If the difference between P1 and P2 is greater than 1 dB, it indicates that the fiber connection is faulty， You can discard.