The structural composition and key technical parameters of the optical module

1. The average transmitted optical power refers to the arithmetic mean of the optical power when the signal logic is 1 and the optical power when it is 0.
2. The extinction ratio refers to the ratio of the average transmitted optical power of all “1″ codes to the average transmitted optical power of all “0″ codes. It will affect the receiving sensitivity. The extinction ratio should be controlled within a reasonable range. A large extinction ratio is conducive to reducing Power penalty, but too large will increase the pattern-related jitter of the laser.
3. Receiving sensitivity refers to the minimum limit that the receiving end can receive the signal. When the signal energy of the receiving end is less than the standard receiving sensitivity, the receiving end will not receive any data.
4. The saturated optical power value refers to the maximum detectable optical power at the receiving end of the optical module, generally -3dBm. When the received optical power is greater than the saturated optical power, bit errors will also be generated. Therefore, if the optical module with high transmitting optical power is tested without attenuation and loopback, bit errors will occur.