How to test the sensitivity of optical transceiver with opti

The sensitivity of a fiber optic transceiver can be said to be an important indicator of a fiber optic transceiver, and understanding how to test the sensitivity of a fiber optic receiver is an important skill. When the optical input power is within a certain range, the performance of the optical fiber receiver is the best. But how do you determine whether a fiber optic transceiver will provide the best performance at the lowest optical input power? A common method is to use optical attenuators, such as diaphragm attenuators. But how do we test that? Next, the small edition of Feichang Technology will introduce in detail how to use the optical attenuator to test the sensitivity of the optical transceiver. Let's have a look!

 

A common way to test the sensitivity of a fiber optic transceiver is to use an optical attenuator, such as a separator attenuator. Usually only two values are needed to complete the test. The process consists of three steps as shown below.

 

1. Use a power meter to measure the optical output power of the optical fiber transmitter. Keep in mind that industry standards define the optical input power of transmitters and receivers for specific network standards. If you are testing a 100BASE-FX transceiver, you should use a 100BASE-FX transmitter, and the optical output power of the transmitter should be within the range specified in the manufacturer's data sheet.

 

2. Connect the transmitter to the receiver and verify that it works at the maximum optical output power that the transmitter can provide. You need to test the receiver at the minimum optical input power that the receiver can accept while still providing the best performance. To do this, you need to get the lowest optical input power value from the manufacturer's data sheet.

 

3. Calculate the attenuation level required for the test. For example, the optical output power of the transmitter is -17 dBm, and the minimum optical power level of the receiver is -33 dBm. The difference between them is 16 dB. You can use a 16 dB divider attenuator at the input of the receiver and retest the receiver. If the receiver still works, it is within the specification.

 

 

Note: Light loss is not considered in the above example. Assuming the transmitter is located 10 km from the receiver and the loss for the entire fiber link (including interconnections) is 6 dB, then for your test you should use a 10 dB divider attenuator instead of a 16 dB one.

 

If there is no professional instrument that can directly test the sensitivity, you can test it like this: the optical transceiver network port is connected to the computer, PING the remote computer through the optical transceiver, connect the dimmable light to the optical fiber, and slowly increase the attenuation, when the PING test has just lost packets, the received optical power is the sensitivity.

 

Optical attenuator is a very important optical fiber passive device, which can attenuate the optical signal energy according to the user's requirements, and can also be used to test the sensitivity of optical fiber transceiver. A complete range of optical attenuators brings convenience to users of optical communication.

 

Well, that's all about how to use optical attenuators to test the sensitivity of optical transceivers. The relevant details of this problem, I hope to help you!