Comparison of supercontinuum generation spectral intensity
in benzene‑core PCFs with different types of lattices
in the claddings
Authors: Lanh Chu Van, Bao Tran Le Tran, Thuy Nguyen Thi, Duc Hoang Trong, Trong Dang Van, Trang Do Mai, Hoang Trinh Ngoc, Thanh Thai Doan, Khoa Doan Quoc
Optical and Quantum Electronics
: 54 : 840
Publishing year: 10/2022
Three newly designed benzene-core photonic crystal fibers (BC-PCFs) can optimize both
chromatic dispersion and attenuation characteristics simultaneously for the most efficient
application to generate supercontinuum. The nonlinear characteristics of BC-PCFs with the
circular lattice (CL), square lattice (SL), and hexagonal lattice (HL) are analyzed numerically
to select the optimal PCF. The three optimized structures: #CBF1, #SBF2, and #HBF3
are intended for supercontinuum generation (SCG) in an all-normal dispersion regime. The
obtained results demonstrated that although #HBF3 fiber has a larger effective mode area
and attenuation than #CBF1, #SBF2 fibers, the dispersion curve of #HBF3 is flattest and
closest to the zero-dispersion curve in the wavelength region of 0.8–2.0 μm hence it has the
highest efficiency for SCG. These PCFs are capable of coherent octave-wide SCG in the
0.66–1.53 μm, 0.71–1.76 μm, and 0.71–1.82 μm wavelength ranges with low peak power
of 0.45 kW and 40 fs pulses coupled to the core. Those fibers are the real objects for the
sources of all-fiber supercontinuum, which can be substituted for glass core fibers because
the nonlinearity of silica is lower than that of benzene. The proposed remedy can lead to
new low-cost all-fiber optical systems.
