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Related Experiment Videos

Spontaneously excited pulses in an optically driven semiconductor laser.

Sebastian Wieczorek1, Daan Lenstra

  • 1Department of Physics and Astronomy, FEW, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands. smwiecz@sandia.gov

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|March 5, 2004
PubMed
Summary

Quantum noise in semiconductor lasers can trigger self-pulsations. Analyzing interpulse time statistics near bifurcations helps characterize multipulse excitability in these noisy laser systems.

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Area of Science:

  • Optics and Photonics
  • Quantum Optics
  • Nonlinear Dynamics

Background:

  • Optically injected semiconductor lasers are susceptible to intrinsic quantum noise, including spontaneous emission and shot noise.
  • This quantum noise can induce complex behaviors like self-pulsations and intensity multipulses from a stable operating state.
  • Deterministic models of these lasers exhibit excitability, showing single-, double-, or triple-pulse responses near specific bifurcations.

Purpose of the Study:

  • To investigate how intrinsic quantum noise excites intensity multipulses in optically injected semiconductor lasers.
  • To analyze the interpulse time statistics in regions near k-homoclinic (Shilnikov) bifurcations.
  • To determine if these statistics can differentiate between various multipulse excitability regimes.

Main Methods:

Related Experiment Videos

  • Studying the dynamics of optically injected semiconductor lasers under the influence of quantum noise.
  • Analyzing parameter regions near k-homoclinic (Shilnikov) bifurcations.
  • Calculating and comparing interpulse time statistics for different excitability scenarios.

Main Results:

  • Intrinsic quantum noise alone can excite intensity multipulses from a steady state in optically injected semiconductor lasers.
  • Noisy lasers demonstrate self-pulsations within the locking region of the deterministic system.
  • Interpulse time statistics exhibit significant differences in regions corresponding to single-, double-, and triple-pulse excitability.

Conclusions:

  • Quantum noise is a key factor in generating multipulse dynamics in semiconductor lasers.
  • Interpulse time statistics provide a valuable tool for characterizing and distinguishing different multipulse excitability regions in real laser devices.
  • This research offers insights into the complex behavior of noisy nonlinear optical systems.