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Kvantovaya Elektronika, 2010, Volume 40, Number 9, Pages 789–793 (Mi qe14358)  

Lasers

Effect of the pump rate and loss perturbations on the lasing dynamics of a Fabry — Perot laser

N. Kumara, V. I. Ledenevb

a Indira Gandhi Centre for Atomic Reseach, India
b Institute on Laser and Information Technologies, Russian Academy of Scienses, Shatura, Moscow Region

Abstract: Transition from generation of the fundamental mode to generation of the fundamental and first modes is studied numerically under the action of nonstationary asymmetric perturbations of pump rate and loss distributions in the active medium layer. It is shown that emergence of perturbations directly leads to excitation of the first mode with significant amplitude. The regime of two-mode lasing in the presence of perturbations is shown to appear at a pump rate that is smaller than the threshold one for two-mode lasing in the absence of perturbations. It is found that the first-mode amplitude has a maximum at a frequency of intermode beatings of an unfilled Fabry — Perot resonator. It is also determined that emergence of nonstationary asymmetric perturbations leads to an increase in the average intensity of the fundamental mode. Various transition regimes to two-mode lasing are compared in different types and periods of perturbations. The operability of the scheme controlling the mode composition of laser radiation is considered.

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English version:
Quantum Electronics, 2010, 40:9, 789–793

Bibliographic databases:

PACS: 42.55.Lt, 42.60.Mi
Received: 12.05.2010
Revised: 22.07.2010

Citation: N. Kumar, V. I. Ledenev, “Effect of the pump rate and loss perturbations on the lasing dynamics of a Fabry — Perot laser”, Kvantovaya Elektronika, 40:9 (2010), 789–793 [Quantum Electron., 40:9 (2010), 789–793]

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