ANALYSIS OF DOUBLE-PARALLEL AMPLIFIED RECIRCULATING OPTICAL-DELAY LINES

A novel method of analysis of double-parallel amplified recirculating optical-delay lines (DPAROD) is presented. The location of the maxima and the minima of the transfer function for this configuration is calc ulated and experimentally demonstrated. The influence of different par ameters, such as the coupling coefficients, gains, lengths of the fibe r loops and fractional losses of the directional couplers, on the shap e of the transfer function are analyzed. Different measurements have b een taken to verify this model. The potential application of these int erconnected delay loops as filters is a reason for developing this met hod.