Abstract
Abstract The dependence of the maximum measurable distance (MMD) in optical time domain reflectormetry (OTDR) upon fiber and receiver parameters, number of averaging times, signal pulse width, and input power launched into the fiber has been investigated for both 1.3- and 1.5-μm wavelengths. The calculations have been performed for both Ge- and InGaAs/InP-APD receivers. As a result it is found that (1) the (MMD) is larger for the InGaAs/InP-APD receiver and (2) a further increase in the MMD can be achieved by cooling the InGaAs/InP-APD receiver.
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