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What is Optical Stressed Receiver Sensivity

This page describes Stressed Receiver Sensivity definition used in optical domain. It also mentions optical Stressed Receiver Sensivity formula or equation.

Definition:
• It is defined as minimum optical average power required as input to achieve given BER.
• It is very useful parameter in optical power budget calculations.
• It depends on various impairments such as ISI, jitter, rise time, fall time, RIN (Transmitter relative intensity noise) etc.


optical receiver model

The figure-1 depicts typical model of an optical receiver. As shown it consists of photo-diode, transimpedance amplifier (TIA), limiting amplifier (LA), clock-data recovery module (CDR) etc.

Stressed Receiver Sensivity Formula or Equation

Following is the formula or equation of optical Stressed Receiver Sensivity.


optical sensitivity

Where,
OMA refers to Optical Modulation Amplitude. It is ratio of peak-to-peak current at the TIA input and photo detector responsivity (ρ) in A/W. It can be expressed as follows.
➤ OMA = IP-P/ρ (µW)
➤re is extinction ratio of the received optical signal.



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