All-optical synchronization of self-pulsating laser diodes with frequency multiplication and division

Egan, A.; Harley-Stead, M.; Rees, Paul; Lynch, Stephen Anthony; McEvoy, Paul; O’Gorman, J.; Hegarty, J.

doi:10.1080/095003498151366

Cited by 1 publication

(2 citation statements)

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“…The important point to note is that the time for the laser to unlock is much faster than the time to lock (within 3-4 pulses) and is independent of the detuning. This result has been shown experimentally in a previous paper [7] and the effect verified using the same model as we employ in this study. This result means that after a few consecutive 0's the SPLD would have reverted back to its free-running frequency and the clock would obtain a timing error with respect to the data signal.…”

Section: Time Taken To Synchronizesupporting

confidence: 68%

“…Our model successfully predicts the experimental frequency and power limits in which lock can be achieved [5] as well as the regions where lock cannot be obtained. Recently, this model has been used further to verify the synchronization limits for the cases of optical synchronization with frequency multiplication and division [7]. Most of the initial results of this paper would be very difficult to measure experimentally because we are studying timings on the pulse-to-pulse level where noise would play a major role (although we have verified the model using optical power spectrum measurements).…”

Section: Phasementioning

confidence: 94%

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A theoretical analysis of optical clock extraction using a self pulsating laser diode

Rees¹,

McEvoy²,

Valle³

et al.

Nonlinear Optics '98. Materials, Fundamentals and Applications Topical Meeting (Cat. No.98CH36244)

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Abstract-The potential for using inexpensive compact disc laser diodes as optical clock extraction elements in transparent networks has led to an increase in research into the dynamics of self-pulsating laser diodes. We use a rate-equation model to simulate the synchronization of the self-pulsating laser output pulses to a periodic optical signal. In particular, we investigate the time it takes for the laser to synchronize to the input signal and also, the time taken for the laser to unlock when the signal is removed. The effect of varying the power of the optical signal and the detuning of the input signal frequency relative to the laser's self-pulsation frequency are determined. Our results enable us to identify important issues which need to be addressed when a self-pulsating laser diode is used in a clock extraction subsystem. In particular, we find that the signal frequency and laser freerunning frequency must be as close as possible to minimize errors. Also, the higher the signal power the quicker the laser synchronizes to the signal, although we find that if the power becomes too large the laser can no longer lock, which would cause a significant increase in detection errors.

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Section: Time Taken To Synchronizesupporting

confidence: 68%

Section: Phasementioning

confidence: 94%