How do you test optical transceiver?

Answer 1

As optical transceiver includes two operating parts, the transmitting part and receiving part, these two parts are the main parts when doing tests on fiber optic transceivers.

Transmitter test

1. The input signal used to test transmitter must be in good quality. Besides, the quality of electrical measurements must be confirmed by jitter measurements and eye measurements. Eye measurement is a common method of inspecting the transmitter output waveforms, because the eye diagram contains a wealth of information that reflects the overall performance of the transmitter.

2, the transmitter output optical signal must be measured by eye test, optical modulation amplitude and extinction ratio and other optical quality indicator.

Receiver test

1. The difference when testing receiver with transmitter is the optical signal must be bad enough. As a result, it is necessary to create an optical eye diagram representing the worst-case signal, which must pass through the jitter Measurement and optical power test.

2, Finally, the need to test the receiver's electronic output signal, this test includes three main types: eye diagram test, this will ensure that the "eye" is in the open state. Eye testing is typically performed by the depth of the bit error rate jitter test, testing different types of jitter tracking and tolerance, testing the internal clock recovery circuit to track the jitter.