Generation of ultrashort pulses in lasers with external frequency modulation

Калашников, В. Л.; Poloiko, I G; Mikhailov, V. P.

doi:10.1070/qe1998v028n03abeh001177

Cited by 3 publications

(4 citation statements)

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“…In close connection with the phenomenon mentioned above, one has to note that a nonlinear interconnection between the scale-incommensurate processes is a crucial factor defining all considered phenomena. An interesting example closely connected with previous one is a laser mode-locked by external phase modulation [55,56]. This system can be described by following equation (compare with Eq.…”

Section: Resonancementioning

confidence: 90%

“…It increases with saturated net-gain Àσ, is closely associated with the modulation frequency ω, and exceeds substantially the minimal value ffiffiffi α p defined by spectral dissipation. However, the nonlinearity (namely, SPM) can modify a situation crucially [55,56]. Firstly, the pulse width decreases (not increases) with a gain that allows generating high energy, and simultaneously, short pulses.…”

Section: Resonancementioning

confidence: 99%

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Chaotic, Stochastic Resonance, and Anti-Resonance Phenomena in Optics

Калашников¹

2017

Resonance

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Existence of different, frequently incommensurate scales is a common phenomenon in nature. Interactions between processes characterized by different scales can result in a multitude of emergent phenomena when a system cannot be described as a scaleseparated hierarchy of underlying processes but presents a substantially new entity with qualitatively new properties and behavior. Striking examples are life, fractals, and chaos. Here, we shall demonstrate the quite nontrivial phenomena: chaotic and stochastic resonances and anti-resonance on examples of laser systems. The phenomena of resonant stochastization (stochastic anti-resonance), self-ordering (stochastic resonance), and resonant chaotization of coherent structures (dissipative solitons) are considered on the examples of mode-locked lasers and Raman fiber amplifiers. Despite a well-known effect of noise suppression and global regularization of dynamics due to the resonant interaction of noise and regular external periodic perturbation, here we report about the reverse situation when the regular and noise-like perturbations result in the emergent phenomena ranging from the coherent structure formation to the fine-grained chaotic/ noisy dynamics. We guess that the nonlinear optical systems can be considered in this context as an ideal test-bed for "metaphorical modeling" in the area of deterministic and stochastic dynamics of resonance systems.

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Section: Resonancementioning

confidence: 90%

Section: Resonancementioning

confidence: 99%

Chaotic, Stochastic Resonance, and Anti-Resonance Phenomena in Optics

Калашников¹

2017

Resonance

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“…The situation can be changed in the presence of the self-phase modulation (SPM) [65] and the dynamic gain saturation. Then τ ∝ 1 / δΩ σ [66].…”

Section: Mode-lockingmentioning

confidence: 99%

Dissipative Solitons in Fibre Lasers

Калашников¹,

Sergeyev²

2016

Fiber Laser

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Iσωeχdiψcipliσaχy cτσcepω τf diψψipaωive ψτliωτσ iψ uσfτlded iσ cτσσecωiτσ wiων ulωχafaψω fibχe laψeχψ. Tνe diffeχeσω mτde-lτckiσμ ωecνσiqueψ aψ well aψ expeχimeσωal χealizaωiτσψ τf diψψipaωive ψτliωτσ fibχe laψeχψ aχe ψuχveyed bχiefly wiων aσ empνaψiψ τσ ωνeiχ eσeχμy ψcal-abiliωy. "aψic ωτpicψ τf ωνe diψψipaωive ψτliωτσ ωνeτχy aχe elucidaωed iσ cτσσecωiτσ wiων cτσcepωψ τf eσeχμy ψcalabiliωy aσd ψωabiliωy. Iω iψ ψντwσ ωνaω ωνe paχameωχic ψpace τf diψψi-paωive ψτliωτσ νaψ χeduced dimeσψiτσ aσd cτmpaχaωively ψimple ψωχucωuχe ωνaω ψimplifieψ ωνe aσalyψiψ aσd τpωimizaωiτσ τf ulωχafaψω fibχe laψeχψ. Tνe maiσ deψωabilizaωiτσ ψceσaχiτψ aχe deψcχibed aσd ωνe limiωψ τf eσeχμy ψcalabiliωy aχe cτσσecωed wiων impacω τf τpωical ωuχ-buleσce aσd ψωimulaωed Ramaσ ψcaωωeχiσμ. Tνe faψω aσd ψlτw dyσamicψ τf vecωτχ diψψipa-ωive ψτliωτσψ aχe expτψed.Keywords: Ulωχafaψω fibχe laψeχ, mτde-lτckiσμ, diψψipaωive ψτliωτσ, στσ-liσeaχ dyσamicψ, vecωτχ ψτliωτσψ, τpωical ωuχbuleσce, ψωimulaωed Ramaσ ψcaωωeχiσμ . IntroductionOveχ ωνe laψω decadeψ, ulωχafaψω fibχe laψeχ ωecνστlτμieψ νave demτσψωχaωed a χemaχkable pχτμχeψψ. "y defiσiωiτσ [ -], ωνeψe ωecνστlτμieψ cτσceχσ μeσeχaωiτσ, maσipulaωiτσ aσd applicaωiτσ τf τpωical pulψeψ fχτm a fibχe laψeχ τχ a laψeχ-amplifieχ ψyψωem wiων i peak pτweχ P 0 exceediσμ ψubψωaσωially aσ aveχaμe laψeχ pτweχ P ave aσd ii pulψe widωνψ wνicν aχe mucν leψψeχ ωνaσ a laψeχ χτuσd-ωχip peχiτd T. Sucν a defiσiωiτσ caσ be χe-iσωeχpχeωed iσ ωeχmψ τf a laψeχ mτde-ρτcπiσμ, wνicν meaσψ a pνaψe-lτcked iσωeχfeχeσce τf ωνe M laψeχ eiμeσmτdeψ pχτduciσμ aσ equidiψωaσω ωχaiσ τf ulωχaψντχω pulψeψ. Tνeσ, ∝ /M M iψ a σumbeχ τf lτcked eiμeσmτdeψ aσd iψ aσ iσωeχ-mτde fχequeσcy iσωeχval defiσed by T ∝ / aσd P 0 ∝ MP ave [ , ]. Iω meaσψ ωνaω a mτde-lτcked laψeχ μeσeχaωeψ a cτmb τf equidiψωaσω τpωical fχequeσcieψ cτmpχiψiσμ ωνe bχτad ψpecωχal χaσμe ∆ ∝ M . Iω iψ cleaχ ωνaω ωνe ψubψωaσωial eσνaσcemeσω τf P 0 by ωνe facωτχ τf M ∝ / ~ ÷ , i.e. upωτ τveχ-MW level [ , ] aσd -χeducωiτσ ~T/M, © 2016 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. [ , ]. Tνe exωχaτχdiσaχy peak pτweχψ iσ cτmbiσaωiτσ wiων ωνe dχaψωic pulψe widων decχeaψe bχiσμ ωνe νiμν-field pνyψicψ τσ ωableωτpψ τf a mid-level uσiveχψiωy lab [ -]. Mτχeτveχ, ωνe τveχ-MHz pulψe χepeωiωiτσ χaωeψ pχτvide ωνe ψiμσal χaωe impχτvemeσω facωτχ τf ÷ iσ cτmpaχiψτσ wiων ωνaω τf claψψical cνiχped-pulψe amplifieχψ [ ]. "ψ a χeψulω, ωνe ψiμσal-ωτ-στiψe χaωiτ eσνaσceψ ψubψωaσωially, aψ well."στωνeχ aψpecω τf ωνe ulωχafaψω laψeχ applicaωiτσψ iψ cτσσecωed wiων ψωudyiσμ στσ-liσeaχ pνeστmeσa [ ]. Ulωχafaψω laψeχψ became aσ effecωive plaωfτχm fτχ iσveψωiμaωiτσ τf μeσeχal στσ-liσeaχ pχτceψψeψ ψucν aψ iσψωabiliωieψ aσd χτμue waveψ [ , ], ψelf-ψimilaχiωy [ ] aσd ωuχbu-leσce [ ]. " cτνeχeσω ψelf-τχμaσizaωiτσ iσ ψucν στσ-liσeaχ ψyψωemψ [ , ] iψ ωνe keyψωτσe τ...

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“…Lasing was studied on the basis of the distributed model (see, e.g., [5]) taking into account the ampliécation of a slowly varying laser éeld a in a quasi-two-level active medium with the gain a saturated by the full USP energy, linear loss g, the group velocity dispersion d, the action of a spectral élter with the reciprocal spectral width t f , SPM and the`instantaneous' saturation of loss through self-focusing with coefécients b and s, respectively, and the coherent interaction of USPs with a semiconductor switch. The solution of the system of laser equations was sought in the analytic form using the two-level energy diagram of a semiconductor switch, which well corresponds to actual switches based on quantum-well semiconductor structures.…”

Section: Modelmentioning

confidence: 99%

Theory of generation of sub-10-fs pulses in a cw solid-state laser with a semiconductor passive switch and self-focusing under coherent-interaction conditions

Калашников¹,

Krimer²,

Poloiko³

2000

Quantum Electron.

Self Cite

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A brief review of established methods shows that only with the Berthelot technique is it possible to see a finite volume of liquid in sustained mechanical tension. A short discussion of the practice and theory reveals two uncertainties with the conventional technique : that of the determination of a true filling temperature, and the influence of compliance by the glass on the tension developed. A description is then given of a modified apparatus with which these difficulties do not arise. The tube is formed into a coil which deflects sufficiently to indicate internal pressure or tension, and by monitoring these deflections with a distance meter a record of pressure/ tension against temperature can be made. The course of a typical run is shown from which the excess pressure, filling temperature and limiting tension may all be estimated with much greater precision than befoie. The orders of magnitude of the results obtained are indicated, and a possible influence of non-uniform gaseous supersaturation is suggested.

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Generation of ultrashort pulses in lasers with external frequency modulation

Cited by 3 publications

References 1 publication

Chaotic, Stochastic Resonance, and Anti-Resonance Phenomena in Optics

Chaotic, Stochastic Resonance, and Anti-Resonance Phenomena in Optics

Dissipative Solitons in Fibre Lasers

Theory of generation of sub-10-fs pulses in a cw solid-state laser with a semiconductor passive switch and self-focusing under coherent-interaction conditions

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