Designing single-mode fibres for near-IR(1.1–1.7 μm) frequency generation by phase-matched four-photon mixing in the minimum chromatic dispersion region

Stimulated four-photon mixing and efficient polychromatic visible light generation in SiO2−based single-mode optical fibers pumped at 1.319 μm

“…The phase-matching condition was satisfied, with the generated waves' propagating in the same mode as the pump, because the idler wave at 1162 nm and the signal wave at 1520 nm straddled the minimum-dispersion wavelength of test fiber, both then experiencing the same group delay dispersion, and as a consequence providing a very efficient wave-mixing process. The frequency shift associated with idler and signal waves related to the pump frequency was -1000 cm-', which agrees quite well with the experimental and theoretical reports of Lin et al [20,21]. The spectral characteristics of radiation emitted from P,O, fiber in the spectral region above 1.32 p m have already been studied in detail [22], and it suffices to mention that for power levels lower than 150 mW, the spectrum presents the feature of stimulated Kaman scattering in silica fibers and P,O, doping with Stokes bands associated with Si-0-Si and P = O vibration modes.…”

“…The phase-match condition was again satisfied, with the signal and idler waves straddling the minimum-dispersion wavelength of test SO,-core fiber. The measured frequency shift was also within the range for self-phase-matched wave mixing in the minimum-chromatic-dispersion region [20,21]. The lower intensity narrow line at 998 nm shown in the spectrum of Figure 3 was attributed to a stimulated FPM mechanism through x (~) , involving two photons of pump wavelength at 1.319 pm, giving rise to an idler photon at 998 nm and a signal at 1.95 pm.…”

“…In this wavelength region, efficient generation of near-infrared stimulated light scattering by pumping of a single-mode fiber with a few hundred nanosecond pulses at 1.32 p m has been reported [19], and a theoretical and experimental study of phase-matching characteristics in similar experiments has also been presented [20]. By designing single-mode fibers for near-infrared frequency conversion, Lin et al [21] were able to generate radiation in the wavelength range of 1.1-1.7 p m by phase-matched FPM at the minimum group velocity of the dispersion region in a single-pass arrangement. However, so far little attention has been directed toward using a pump source wavelength in the fiber low-linear-loss and minimum-dispersion region in order to study frequency conversion through stimulated nonlinear mixing processes for the generation of visible wavelength light.…”

Dual-core optical fibers for efficient mid-infrared generation via third-order frequency mixing and coupling-length phase matching

“…While three-and four-wave mixing in fibers has been treated extensively in the literature [4][5][6][7][8][9][10][11][12][13][14][15], that previous work mostly concentrated on the case of small frequency differences, which arXiv:2405.11090v1 [physics.optics] 17 May 2024 enabled natural phase matching for the above process, or the simplified analysis of phase-mismatch by series expansion near the degeneracy point where all frequencies are equal. The case of large frequency differences between the interacting waves, which is the focus of this work, has been treated less often [16][17][18][19][20] and depends on the features of the refractive index dispersion over a wide range of wavelengths. In this case, the coherence length for phase-matched three-wave mixing is in general much shorter than the length required to obtain a good conversion efficiency.…”

Estudio de efectos no lineales en dispositivos fotónicos y su aplicación en sistemas radio sobre fibra óptica.

“…Se caracteriza por la aparición de nuevas frecuencias del tipo ω i + ω j − ω k a la salida del dispositivo. Aunque este fenómeno produce degradaciones en los sistemas ópticos multicanal [Shi90], encuentra un gran número de aplicaciones como la generación de frecuencias [Lin82], o la elaboración de convertidores de longitud de onda y conjugadores ópticos [Ino92a, Wu94, Zho94, Zha96, Shi96, Duc96]. Debe tenerse en cuenta que la nueva onda generada mediante FWM es la conjugada compleja de la onda de entrada a frecuencia ω k .…”