Performance analysis on semiconductor laser amplifier loop mirrors

Study on the instantaneous frequency deviation of pulses switched from semiconductor optical amplifier–assisted Sagnac interferometer

“…5 This in turn is an attractive feature from a practical standpoint since the relative delay between the counterpropagating clock components is responsible for the creation, and determines the width, of the window within which the clock pulses must lie so as to achieve maximum switching. 6,27 Thus, it is possible to alter the size of this permissible time frame depending on the target application, 39 provided of course that the operational restrictions for T asym are not violated, 32 without negative by-product for ⌬. Figure 6 displays ⌬ as a function of the SOA small signal gain, where its values have been selected to successively differ by 3 dB.…”

“…37 This technique could be exploited when the output from such a switch sets the operational state of another, identical one 11,12,[19][20][21][22]38 or is fed back to itself. 17,18 Under such circumstances, the narrower the gating pulses are, the better is the shape of the window inside which switching is possible 27 and hence the overall performance. Thus, all these cases indicate the wide potential of the instantaneous frequency deviation of the pulses at the output of a switch such as the SOA-assisted Sagnac.…”