200 research outputs found
The problem of emotional instability of would-be teachers in higher education
An attempt to interpret some aspects of such integral human property as emotional stability is suggestedCΠ΄Π΅Π»Π°Π½Π° ΠΏΠΎΠΏΡΡΠΊΠ° ΠΎΡΠΌΡΡΠ»ΠΈΡΡ ΠΎΡΠ΄Π΅Π»ΡΠ½ΡΠ΅ Π°ΡΠΏΠ΅ΠΊΡΡ ΡΠ°Π·Π²ΠΈΡΠΈΡ ΡΠ°ΠΊΠΎΠ³ΠΎ ΠΈΠ½ΡΠ΅Π³ΡΠ°ΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΠΊΠ°ΡΠ΅ΡΡΠ²Π° Π»ΠΈΡΠ½ΠΎΡΡΠΈ, ΠΊΠ°ΠΊ ΡΠΌΠΎΡΠΈΠΎΠ½Π°Π»ΡΠ½Π°Ρ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡ
Hard and Soft Excitation Regimes of Kerr Frequency Combs
We theoretically study the stability conditions and excitation regimes of
hyper-parametric oscillation and Kerr frequency comb generation in continuously
pumped nonlinear optical resonators possessing anomalous group velocity
dispersion. We show that both hard and soft excitation regimes are possible in
the resonators. Selection between the regimes is achieved via change in the
parameters of the pumping light.Comment: 4 pages, 7 figure
Transient Regime of Kerr Frequency Comb Formation
Temporal growth of an optical Kerr frequency comb generated in a
microresonator is studied both experimentally and numerically. We find that the
comb emerges from vacuum fluctuations of the electromagnetic field on
timescales significantly exceeding the ringdown time of the resonator modes.
The frequency harmonics of the comb spread starting from the optically pumped
mode if the microresonator is characterized with anomalous group velocity
dispersion. The harmonics have different growth rates resulting from sequential
four-wave mixing process that explains intrinsic modelocking of the comb.Comment: 4 pages, 5 figure
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