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PIC microcontroller - [GI.jpg|thumb|PIC 1655A]
Step-index profile - For an optical fiber, a step-index profile is a refractive index profile characterized by a uniform refractive index within the core and a sharp decrease in refractive index at the core-cladding [ The step-index profile corresponds to a power-law index profile] with the profile parameter approaching infinity. The step-index ...
Interrupt request - In computing, an interrupt request (IRQ) is a phrase used to refer to either the act of interrupting, the bus lines used to signal an interrupt, or the interrupt input lines on a Programmable Interrupt Controller (PIC). Interrupt lines are often identifed by an index with the format of IRQ followed by a number.
Refractive index contrast - Refractive index contrast, in an optical fiber, is a measure of the relative difference in refractive index of the core and cladding. Refractive index contrast, Δ, is given by Δ = (n12- n22)/(2n12), where n1 is the maximum refractive index in the core and n2 is the refractive index of the homogeneous cladding.
