What is OMA | Optical Modulation Amplitude
This page describes OMA (Optical Modulation Amplitude) definition used in optical domain. It also mentions OMA (Optical Modulation Amplitude) formula or equation.
• The term OMA refers to difference in two power levels in optical domain for the optical signal generated by laser source. This is expressed as follows.
• OMA i.e. Optical Modulation Amplitude is usually specified as peak to peak value in units of mW.
The figure-1 depicts OMA in a stressed eye diagram of an optical signal.
OMA (Optical Modulation Amplitude) Formula or Equation
The Optical Modulation Amplitude (OMA) can be expressed either using equation-1 or equation-2.
Where, Pav is average power where as re is extinction ratio of optical signal.
➤Pav = (P1 + P0)/2
➤re = P1/P0
➤Here P1 indicates power level when optical light source is in ON condition.
➤P0 indicates power level when optical light source is in OFF condition.
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