Polarization waves and superradiance

Zheleznyakov, V.V.; Kocharovskii, Vit V.; Kocharovskii, Vlad V.

doi:10.3367/ufnr.0150.198611f.0455

Cited by 5 publications

(3 citation statements)

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“…In this situation, which is analyzed in the present paper, both lasing and SF may be strongly changed [10,11]. We focus on the 1D case where the single-site reflections from the facets of a sample are much weaker than the total distributed reflections owing to the resonance wave back-scattering either introduced artificially or present in an inverted two-level medium due to a photonic crystal structure.…”

Section: Introductionmentioning

confidence: 99%

“…Bragg back-scattering of counter-propagating waves [5], caused by periodic modulation of the dielectric properties of a laser sample (with the period equal to one half of the radiation wavelength / 2 λ ). It was shown that the utmost powerful and short pulses are achieved if the rate regime is replaced by the one typical for Dicke superradiance (SR) (or superfluorescence (SF)), according to earlier results of the theory of mode SR-lasing in low-Q cavities [6][7][8][9][10]. In such superradiant photonic-crystal lasers operating under continuous-wave (cw) pumping, the requirements for low relaxation rates of polarization and inversion in an active medium necessary for the superradiant behavior are weaken considerably.…”

Section: Introductionmentioning

confidence: 99%

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Photonic-crystal superradiant laser: effects of homogeneous and inhomogeneous broadening of an active medium

Kocharovskaya¹,

Sergeev²,

Telnykh³

2008

SPIE Proceedings

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We investigate superradiant lasing in 1D photonic crystal taking into account both homogeneous and inhomogeneous broadening in a two-level active medium. The latter may be based on, e.g., the quantum-well heterostructures and the fibers activated by color centers where Bragg structure can be fabricated artificially by means of a periodic modulation of the cladding layers. The truncated Maxwell-Bloch equations for the counter-propagating waves, the polarization and inversion of an inhomogeneously broadened two-level medium are used to analyze numerically the interplay between the back-scattering, amplification, dispersion, and de-phasing of waves. It is found that, if the photonic band gap is less than the coherent amplification bandwidth, there is a wide range of the pumping and relaxation parameters of a two-level medium where superradiant lasing exists and results in generation of a quasi-periodic and/or chaotic series of powerful and short pulses similar to those of Dicke superfluorescence. It is the cavity mode selection due to distributed feedback caused by the resonant Bragg structure which is responsible for the existence of superradiant lasing. Typical parameters of superradiant photonic-crystal lasers, including lengths, photonic band gaps and relaxation rates, are indicated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photonic-crystal superradiant laser: effects of homogeneous and inhomogeneous broadening of an active medium

Kocharovskaya¹,

Sergeev²,

Telnykh³

2008

SPIE Proceedings

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“…In particular, there was estimated the critical reflection factor of mirrors, Rcr, necessitating the dominance of mode SR over unidirectional SR: lnR"2 ln(NSL)"4 {i + + (1/4)ln(NSL)h14}. (1) …”

Section: Introductionmentioning

confidence: 99%

<title>Analytic nonlinear theory of mode superradiance: the profit from the optimal open resonator</title>

Golubyatnikova¹,

Kocharovsky²

1996

SPIE Proceedings

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Superradiance: the principles of generation and implementation in lasers*

Kocharovsky,

Zheleznyakov,

Kocharovskaya

et al. 2017

Phys.-Usp.

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The electrodynamics of active continuous media is applied to theoretically examine collective spontaneous emission regimes of dipole oscillator ensembles. Recent experiments in which the superfluorescence phenomenon has been observed are reviewed. The focus is on propagation and interaction effects experienced by the inhomogeneous waves of active center polarization and electromagnetic fields. The superradiant laser dynamics is examined and prospects for the realization of superradiant lasers using low-Q cavities are discussed.

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Polarization waves and superradiance

Cited by 5 publications

References 0 publications

Photonic-crystal superradiant laser: effects of homogeneous and inhomogeneous broadening of an active medium

Photonic-crystal superradiant laser: effects of homogeneous and inhomogeneous broadening of an active medium

<title>Analytic nonlinear theory of mode superradiance: the profit from the optimal open resonator</title>

Superradiance: the principles of generation and implementation in lasers*

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