Antiphase dynamics and self-pulsing due to a low-frequency spatial population grating in a multimode laser

Kozyreff, Gregory; Mandel, P.

doi:10.1103/physreva.58.4946

Cited by 10 publications

(12 citation statements)

References 11 publications

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“…While on the practical side this choice is a sensible one, earlier results have shown, both theoretically and experimentally, that multi-longitudinal-mode regimes exist where an underlying, long-term, residual intermodal dynamics may exist [1][2][3][4][5][6]. In such a case, the information gathered through the total intensity is incomplete and may hide not only important aspects of the physics of the problem but also some technologically important side effects.…”

Section: Introductionmentioning

confidence: 99%

Slow dynamics in semiconductor multi-longitudinal-mode laser transients governed by a master mode

Dokhane¹,

Puccioni²,

Lippi³

2012

Phys. Rev. A

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We examine the response to the sudden switch of the pump parameter in a multimode semiconductor laser with intensity coupling on a model whose validity has been successfully compared to experimental results. We find the existence of a very slow modal evolution governed by a master mode, which reaches its steady state on a time scale that is a couple of orders of magnitude longer than that of the total intensity. The practical consequences for applications are examined, such as the temporal evolution of the spectral width of the laser emission and the time at which its steady state is attained. Issues related to modeling choices, such as the number of modes and their placement with respect to line center, are discussed.

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Section: Introductionmentioning

confidence: 99%

Slow dynamics in semiconductor multi-longitudinal-mode laser transients governed by a master mode

Dokhane¹,

Puccioni²,

Lippi³

2012

Phys. Rev. A

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“…One reason is that the extension of the TSD equations [13,18] predicts a selfpulsing threshold in the multimode regime if the pump is sufficiently inhomogeneous spatially. Analytic selfpulsing conditions have been derived for two-and three-mode lasers.…”

Section: Introductionmentioning

confidence: 99%

Global rate equation description of a laser

Mandel

2000

The European Physical Journal D - Atomic, Molecular and Optical

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Abstract. The global integro-differential rate equations describing a multimode laser are analyzed. Expressions for the relaxation oscillation frequencies and their damping rates in the single-mode and two-mode regimes are obtained without specifying either the cavity geometry or the longitudinal pump profile. On the same level of generality, we prove the existence of universal relations relating the peaks of the power spectra in the two-mode regime. For a Fabry-Perot with arbitrary longitudinal pump profile, series expansions of all the physical functions are derived in powers of the pump moments. These moments are averages of the pump profile over cavity modes at linear combinations of the lasing frequencies and their harmonics. These results apply to end-pumped and/or partially filled lasers. For a single mode Fabry-Perot laser, we prove that the contribution to the steady state intensity from the lasing mode varies from 75% close to the lasing threshold to zero at high intensity. The remainder comes from the harmonics of the lasing mode. Analyzing the steady state single mode intensity equation in terms of the pump gratings, we prove that close to the lasing threshold only the space average of the pump and its grating oscillating at twice the lasing wave number do not vanish. This provides a hint towards the justification of the usual modal rate equations which retain only these two functions in the dynamical evolution of a laser. For a Fabry-Perot with constant pump profile, an exact expression for the upper boundary of the stable single mode regime is derived. In that two-mode regime, we prove that there is a critical value of the pump at which the ratio of the two relaxation oscillation frequencies is 2, leading to an internal resonance.PACS. 42.55.Ah General laser theory -42.65.Sf Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics

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“…Here, first of all, spatial, rather than spectral, hole burning in the active medium takes place. The mode coupling due to such holes leads to the known antiphase dynamics of relaxation oscillations [15][16][17], which is essentially the same as anticorrelated fluctuations of the mode intensities.…”

Section: Nonlinear Coupling Of Modes and Excess Noise Of Dynamical Namentioning

confidence: 96%

Problems of excess noise and adequate laser models

Khanin

2004

Radiophys Quantum Electron

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We discuss the problem of excess noise in lasers of different dynamical classes, as well as adequate models for the description of such noise. It is shown that the excess noise in lasers is caused by mode-mode coupling. The linear coupling leads to the phenomenon of excess noise in the narrow sense (Petermann's excess noise), while the nonlinear mode coupling is the universal mechanism for excess noise of dynamical nature. It is shown that the theory of excess noise in class-B lasers does not require new approaches and can be developed on the basis of models with adiabatically eliminated polarization obtained in a standard way.

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Antiphase dynamics and self-pulsing due to a low-frequency spatial population grating in a multimode laser

Cited by 10 publications

References 11 publications

Slow dynamics in semiconductor multi-longitudinal-mode laser transients governed by a master mode

Slow dynamics in semiconductor multi-longitudinal-mode laser transients governed by a master mode

Global rate equation description of a laser

Problems of excess noise and adequate laser models

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