Performance analysis of a modal converter based on an asymmetric dual-core photonic crystal fiber

Abstract

Análisis del rendimiento de un conversor modal basado en una fibra de cristal fotónico doble núcleo asimétricaErick Reyes-Vera 1,2, * , J. Úsuga 2 , J. Acevedo-Echeverry 2 , N. Gómez-Cardona 2 , M. Varón 1 Colombia, A.A. 055051, Bogotá, Colombia. 2. Department of Electronic and Telecommunications Engineering, Instituto Tecnológico Metropolitano, A.A. 50034, Medellín, Colombia. (*) E-mail: eereyesv@unal.edu. Department of Electrical and Electronic Engineering, Universidad Nacional de ABSTRACTIn this paper a novel modal converter based on an asymmetric dual-core photonic crystal fiber is proposed and numerically analyzed by using the full-vector finite element method. This converter allows mode conversion between the LP01 and LP11 modes, and the LP01 and LP21 modes. These modes are obtained at 1.55 µm. In addition, it was found that the operating wavelength of this device has a great dependence on the different geometric parameters of the structure, such as the diameter of the holes and the pitch as well. Finally, a compact device that can be used in the O + S + C + L + U bands with efficiency greater than 80% and a total length of 2 mm was obtained. This is a very interesting alternative to fabricate new all-fiber optic devices that could be implemented in mode division multiplexing systems.Key words: Mode-division multiplexing; mode converter; photonic crystal fiber; dual-core optical fiber. RESUMENEn este artículo, un novedoso conversor modal basado en una fibra de cristal fotónico con núcleos asimétricos es propuesto y analizado a través de la implementación del método de elementos finitos. Este dispositivo permite la conversión modal entre los modos LP01 con el LP11 y LP01 con el LP21 a una longitud de onda de 1.55 µm. Adicionalmente, hemos encontrado que la longitud de onda de operación de este tipo de dispositivos presenta una fuerte dependencia con los parámetros geométricos de la estructura tales como el diámetro de los agujeros y la distancia entre ellos. Finalmente, se obtuvo un dispositivo fotónico compacto que puede ser empleado en las bandas O + S + C + L + U con eficiencias superiores al 80 % y una longitud total de 2 mm. Esta es una alternativa interesante a la hora de fabricar nuevos dispositivos totalmente integrados a fibra óptica que puedan ser implementados en sistemas de multiplexación por división modal.Palabras clave: multiplexación por división modal; conversor modal; fibra de cristal fotónico; fibra óptica doble núcleo. REFERENCES AND LINKS / REFERENCIAS Y ENLACES[1] D. J. Richardson, J. M. Fini, and L. E. Nelson, "Space-division multiplexing in optical fibres," Nat. Photonics, vol. 7, no. April, pp. 354-362 (2013 [9] Y. Weng, X. He, J. Wang, and Z. Pan, "All-optical ultrafast wavelength and mode converter based on inter-modal four-wave mixing in few-mode fibers," Opt. Commun., vol. 348, pp. 7-12 (2015).https://doi.org/10.1016/j.optcom.2015.03.018[10] T. Hellwig, T. Walbaum, and C. Fallnich, "Optically induced mode conversion in graded-index fibers using ultra-short laser pulses," ...

Design of Low-loss and Highly Birefringent Porous-Core Photonic Crystal Fiber and Its Application to Terahertz Polarization Beam Splitter

“…The performance and basic properties of the PBS can be analyzed by employing the coupled mode theory [54]. Therefore, the coupling behavior between both cores can be achieved by using a super mode analysis [48], [55]. The super modes are formed by modes of the individual cores.…”

Tunable Mode Converter Device Based on Photonic Crystal Fiber with a Thermo-Responsive Liquid Crystal Core

“…To solve this problem, several alternatives based on optical fiber technology had been explored in the past, such as FBGs, LPFGs, tapered fibers and applying lateral pressure [13][14][15][16]. Recently, schemes of mode conversion based on modal coupling in asymmetric dual-core optical fibers have been proposed [17][18][19][20][21]. Cheng et al numerically analyzed the mode coupling between a large core and a small core in an asymmetric, dual-core photonic crystal fiber (PCF), reporting a LP 01 to LP 02 mode converter with a bandwidth of 14 nm and a length of 12.7 mm; it operates at around 1550 nm [17].…”

Advances in electromagnetic applications and communications

“…In SDM systems, independent data streams can be transmitted in parallel spatial channels. SDM can be implemented in two different ways: first, with Multi-Core Fibers (MCF) using each core as an independent channel for sending information [8], [10]; and second, with Modal Division Multiplexing (MDM), which sends coded information through different propagation modes of a multimode fiber [11]. Mode Multiplexers (MUX) and Demultiplexers (DEMUX) are critical components for SDM transmission.…”