Hello everyone!
This post will introduce the receiver sensitivity and overload point of the optical module to you. I believe you will be interested.
Receiver Sensitivity
The minimum input optical power a receiver requires to achieve the expected BER performance. The larger the receiver sensitivity, the poorer the receiver performance.
Unit: dBm
What is BER?
The bit error rate (BER) measures the data transmission precision within a specified time period.
The expected BER of a system is generally less than 10-10.
Factors affecting receiver sensitivity
OSNR: The larger the OSNR, the less the noise on the receive circuit and the less the impact on receiver sensitivity.
Signal waveform: It is determined by the transmit-end extinction ratio and fiber dispersion.
Signal transmission rate: The larger the transmission rate, the poorer the receiver sensitivity and the shorter the regeneration distance.
Overload Point
The overload point is the overload optical power, the maximum average input optical power at the receive end that achieves the expected BER performance.
Unit: dBm
Minimum receiver overload point
The overload point defined in the standards means the minimum receiver overload point. It is a BER-related concept and indicates the maximum mean receive optical power of the receiver to achieve the expected BER performance.
All the overload points specified in the optical module specifications of WDM devices currently mean the minimum overload points.
A certain margin will be left for devices in actual applications. Therefore, the measured overload point will be slightly greater than the value specified for the minimum overload point in optical module specifications.
Maximum input optical power
Maximum input optical power indicates the maximum receive optical power of the receiver.
If the practical optical power of a device is greater than the maximum input optical power, the optical components on the device may be damaged.
Receiver Sensitivity and Overload Point
Receiver sensitivity and overload point are both critical facets of optical power.
If the input optical power is less than the receiver sensitivity, it is too weak to ensure that equipment receives signals.
If the input optical power exceeds the overload point, it may be impossible to achieve the expected BER performance, and even the device will be damaged.
That's all. If you want to know more, please leave a message below.
Thank you!
