Broadband dispersion compensation using inner cladding modes in photonic crystal fibers

Abstract

Abstract:A photonic crystal fiber is optimized for chromatic dispersion compensation by using inner cladding modes. To this end, a photonicoriented version of the downhill-simplex algorithm is employed. The numerical results show a dispersion profile that accurately compensates the targeted dispersion curve, as well as its dispersion slope. The presented fiber has a simple structure, while radiation losses can be reduced simply by adding a few more air-hole rings. Fabrication tolerances are also considered showing how fabrication inaccuracies effects can be overridden by just adjusting the compensation length.

Synthesis of Carbon Nanodots from Sugarcane Syrup, and Their Incorporation into a Hydrogel-Based Composite to Fabricate Innovative Fluorescent Microstructured Polymer Optical Fibers

“…Here, we report an innovative design of waveguide, which is essentially different from the ones of other double-clad mPOFs previous fabricated. In other works, the reported cavities are arranged according to hexagonal profiles [ 60 , 65 , 80 ]; the fibers create a pattern of tangential circular cavities for field enhancement [ 81 ]; or the fibers present successive layers of non-tangential cavities, both in hexagonal and circular patterns [ 82 ]. The design developed in this work presents advantages for the liquid matrix incorporation.…”

Ultralow chirp photonic crystal fiber Mach–Zehnder interferometer

“…To obtain the required chirp profile, we used the Nelder-Mead method as in [12]. This adaptation uses a semi-analytic function to simulate the effect of scale on a dispersive structure, allowing to accelerate the Nelder-Mead method convergence and to avoid stagnation.…”

“…Combining the parameters variation (din , dout and L) in a deviation of ± 5 %, it obtains different FSR values as expected. For this purpose, we used variations of ± 5 % that occurred realistically according the fiber fabrication process as explained in [12]. Therefore, the parameters enlargement and contraction has been adjusted to keep din /L and dout /L constant.…”

“…1(b). The high difference of the refractive index between silica and air, along with the forbidden broadband propagation across the microstructured region, confines the light inside the core [12,13]. In previous studies, the sensing arm is formed by including a second defect inside the microstructure as done by Liang et al [7].…”

High sensitivity LPG Mach–Zehnder sensor for real-time fuel conformity analysis

“…LPGs consist of a periodic perturbation in optical fiber refractive index which is able to, at specific wavelengths, partially couple light that propagates in the fundamental core mode to co-propagating cladding modes [3]. Such cladding modes can have interesting chromatic dispersion characteristics [4,5] or, more generally, be used for sensing applications. Grating transmission spectrum, which is characterized by attenuation bands due to the high loss experienced by the cladding modes, can be used to sense parameters such as temperature, LPG surrounding medium refractive index and fiber bending curvatures [6].…”