390 research outputs found
Ordinary and extraordinary refractive index profile characterization of single-mode proton-exchanged waveguides
No full textSimultaneously phase-matched second- and third-harmonic generation from 1.55 μm radiation in annealed proton-exchanged periodically poled lithium niobate waveguides
No full text
Dispersion of the ordinary refractive-index change in a proton-exchanged LiNbO3 waveguide
No full textWavelength dependence of the ordinary and extraordinary index change in LiNbO3 proton-exchanged waveguides
No full textMid-infrared optical combs from a compact amplified Er-doped fiber oscillator
No full textBy means of a difference-frequency-generation (DFG) process driven by a two-branch Er-doped fiber laser at
a stabilized 100 MHz repetition rate, broadly tunable pulses from 5 to 12 um are generated with an unprecedented
power level of around 100 uW. The mid-IR pulse train is expected to exhibit an harmonic comb
structure as a result of the cancellation of the carrier-envelope offset frequency resulting from the DFG
process
Dispositivo ottico riconfigurabile per reti a divisione multipla della lunghezza d'onda
No full textDispositivo ottico riconfigurabile per reti a divisione multipla della lunghezza d'ond
Optical parametric generation of nearly transform-limited mid-infrared pulses in dispersion-engineered nonlinear waveguides
No full textEffects of high-frequency vibration on critical marangoni number
No full textThe influence of vibration on thermocapillary convection and critical Marangoni number in liquid bridge of half floating zone was discussed for the low frequency range 0.4-1.5 Hz and the intermediate frequency range 2.5-15 Hz in our previous papers. This paper extends the study to high frequency range 15-100Hz. This ground based experiment was completed on the deck of an electromagnetic vibration machine. The results of our experiment shows when the frequency of the applied acceleration is high enough, the amplitude of the time varying part of the temperature response is disappear and the shape of the free surface of the liquid bridge exhibits no fluctuations due to inertia. The critical Marangoni number which is defined to describe the transitions from a peroidical convection in response to vibration to an oscillatory convection due to internal instability is nearly the same as the critical Marangoni number for oscillatory flow in the absence of vibration
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