Highly coherent supercontinuum generation in a polarization-maintaining CS₂-core photonic crystal fiber

Abstract

In this paper, we design a polarization-maintaining CS2-core photonic crystal fiber (PM-CCPCF). The two air holes at x-direction are infiltrated with C2H5OH in order to introduce the birefringence. By optimizing the structure parameters of the PM-CCPCF, it is demonstrated that the x-polarization fundamental mode has all-normal dispersion profile and the corresponding y-polarization fundamental mode has anomalous dispersion profile for pump wavelength 1.76 μm. Then, we investigate the supercontinuum (SC) generations when different fiber lengths, pump peak powers, and pump pulse widths are chosen, respectively. Simulation results show that for the xpolarization and y-polarization fundamental modes, highly coherent SCs can be generated by appropriately choosing the fiber length and pump pulse parameters. Finally, nonlinear propagation dynamics are analysed when the optimized fiber length and pump pulse parameters are used. The bandwidth of the SCs generated for xpolarization and y-polarization fundamental mode can be up to 0.82 and 1.26 octave, respectively.

Liquid‐Core Optical Fibers—A Dynamic Platform for Nonlinear Photonics

“…[94] To date, only a few studies investigated the special impact of the slow nonlinearities of liquids on in-fiber light propagation. Novel nonlinear dynamics have been identified, such as reduced spectral broadening with increasing molecular fraction, [95] the formation of unconventional, solitonlike optical features, [96,97] and lower noise vulnerability of soliton fission. [59] Those particular results are reviewed in Section 4.3.1.…”

Design and numerical analysis of large negative dispersion and ultra-high nonlinearity CS 2 -core LCPCF

“…In high magnetic fields, active nonlinearity occurs in the response of any PCF to light transmission. the nonlinearity coefficient γ of the PCF can be calculated [14]from Eq.7.…”

“…According to the increase of γ, on the one hand, materials with larger nonlinear refractive index coefficients (n2) can be used in the fiber core. The liquid [10][11][12] has a higher nonlinear coefficient and is better filled than silica and metal [13].2019, Xu et al used CS2 as the core and filled the left and right gas holes in the x-direction with C2H5OH, obtaining a maximum nonlinearity of 8,340 W -1 km -1 [14]. In 2020, Bikash et al filled the elliptical core with CS2 and obtained a 13,667 W -1 km -1 high nonlinearity after optimizing the parameters [12].…”

Highly coherent and multi-octave mid-infrared supercontinuum generations in a reverse-strip AlGaAs waveguide with three zero-dispersion wavelengths

“…The bandwidth and coherence are the two key parameters for evaluating the SC performance. From the previous works, the dispersion characteristic of the optical waveguide has an important effect on the bandwidth and coherence of the generated SC [21][22][23][24][25][26][27][28][29][30]. The dispersion tailoring can be achieved through choosing the waveguide materials, designing the waveguide structure, and adjusting the waveguide geometry parameters [31][32][33][34][35][36][37][38].…”