2 results about "Optical modulation amplitude" patented technology

In telecommunications, optical modulation amplitude (OMA) is the difference between two optical power levels, of a digital signal generated by an optical source, e.g., a laser diode. It is given by OMA=P₁-P₀ where P₁ is the optical power level generated when the light source is "on," and P₀ is the power level generated when the light source is "off." The OMA may be specified in peak-to-peak mW. The OMA can be related to the average power Pₐᵥ=(P₁+P₀)/2 and the extinction ratio rₑ=P₁/P₀ OMA=2Pₐᵥ(rₑ-1)/(rₑ+1) In the limit of a high extinction ratio, OMA≈2Pₐᵥ.