Theoretical investigations of electro-optical synchronisation of self-pulsating laser diodes

Egan, A.; Rees, Paul; O’Gorman, J.; Harley-Stead, M.; Farrell, Gerald; Hegarty, J.; Phelan, Paul J.

doi:10.1049/ip-opt:19960132

IEE Proceedings - Optoelectronics

1996

DOI: 10.1049/ip-opt:19960132

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Theoretical investigations of electro-optical synchronisation of self-pulsating laser diodes

A. Egan

Paul Rees

J. O’Gorman

et al.

Abstract: The synchronisation mechanism of selfpulsating laser diodes is determined and it is shown how this results in a frequency-dependent phase difference between the electrical input and optical output. The time-to-lock of the electrical input to the optical output is examined, particularly with regard to the importance of the initial phase difference between the signals. The effect of synchronisation on timing jitter in selfpulsating lasers is also investigated.

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Cited by 13 publications

(2 citation statements)

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“…For SP LDs synchronized to applied electrical signals, synchronization occurs for both positive and negative detuning of app from f r . 11 Both experiment and calculation show that this is not the case for optically injected signals. Figure 3͑b͒ shows the dependence of ⌬ D on injected power for f r ϭ1.8 GHz.…”

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confidence: 98%

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All-optical synchronization of self-pulsating laser diodes

Egan

Harley-Stead

Rees

et al. 1996

Applied Physics Letters

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We examine the behavior of self-pulsating laser diodes when injected with periodic optical signals. We experimentally and theoretically investigate the phase difference between the injected optical signal and the synchronized self-pulsating laser diode emission. We explore the phase difference dependence on detuning between the laser free-running self-pulsation frequency and the applied signal frequency, and on the injected signal power. The determined sensitive dependence of the phase difference on these factors has important consequences when self-pulsating lasers are used as optical signal processing elements in all-optical communication networks, where such sensitivity may lead to timing problems. © 1996 American Institute of Physics. ͓S0003-6951͑96͒02625-3͔The physics of nonlinear oscillators interacting with applied signals is a problem that has long been of intense interest.1-4 Laser diodes are particularly appropriate for investigating such phenomena as they are a relatively well understood model system for studying nonlinear dynamics and there is fundamental interest in understanding active nonlinear optical system behavior when perturbed by incident optical signals.5 A less esoteric, but nonetheless urgent, applied interest in these matters is driven by telecommunications as the increasing sophistication of high bandwidth fiber optic networks will ultimately demand high speed optically transparent systems. While existing networks are not yet alloptical and contain electronic elements that carry out specific functions such as routing and switching, it is becoming increasingly apparent that such electro-optical conversions will place severe limitations on the bandwidth of future networks. All-optical networks hold the key to communications that will be high-speed, high-volume, and more widespread than ever before, especially given the market driven constraints of effective utilization of the installed infrastructural base. Given these demands and constraints, all-optical alternatives are being sought to many functions currently performed by electronic devices in communication networks. Selection and development of these all-optical networks requires understanding of the interaction of light with active optical media; for example, in wavelength division multiplexing using semiconductor optical amplifiers 6 and in signal processing using self-pulsating laser diodes ͑SP LDs͒.7 In this letter, we examine the behavior of self-pulsating compact disk ͑CD͒ laser diodes when synchronized to externally injected optical signals. We examine the mechanism by which optical synchronization occurs and show how our numerical and experimental results can be explained on the basis of this mechanism. Calculations are found to be in excellent agreement with experimental results.SP LDs using complex, multisection devices have been shown to carry out function such as all-optical synchronization and clock extraction at high speeds. 7,8 However, future low cost networks may require simpler structures with which to implement such...

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“…Previously, the behavior of electro-optically synchronized SP multisection and CD laser diodes has been extensively investigated. [9][10][11] However, for transparent optical systems all-optical synchronization is of greater importance and is the subject of this letter. Figure 1 shows the experimental setup.…”

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confidence: 99%

All-optical synchronization of self-pulsating laser diodes

Egan

Harley-Stead

Rees

et al. 1996

Applied Physics Letters

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InGaN tandem blue–violet quantum well lasers with high frequency self-pulsations

2014

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Staircase-like and bistable frequency response ofself-pulsating laser diodes with optoelectronic feedback

Chen

1997

Electron. Lett.

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Theoretical investigations of electro-optical synchronisation of self-pulsating laser diodes

Cited by 13 publications

References 8 publications

All-optical synchronization of self-pulsating laser diodes

All-optical synchronization of self-pulsating laser diodes

InGaN tandem blue–violet quantum well lasers with high frequency self-pulsations

Staircase-like and bistable frequency response ofself-pulsating laser diodes with optoelectronic feedback

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