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The effect of electrical (finite absorber response time) and optical (distant reflector) external effects on the performance of monolithic mode-locked lasers in a monolithically integrated environment is discussed and illustrated using numerical modeling. The relation of the findings to the recent experimental results is discussed, and some methods of reducing the feedback effects are assessed.
A numerical study of the influence of optical feedback on the dynamics of high-bit-rate mode-locked laser diodes is presented. A wide variety of dynamic regimes is discovered, which is qualitatively different to both single-frequency and self-pulsing lasers. The relation of the findings to the recent experimental results is discussed, and the potential of absorber-amplifier modules as optical isolators...
Cross gain modulation between two different optical signals, inserted through separate ports to an active MMI, has been experimentally measured. The observed trend of modulation reduction by increase of modulated signal power matches previous simulation results. An associated XPM is expected and could be optimized to enable using the active MMI in all-optical switching.
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