A NEW TYPE OF SINGLE-MODE LMA PHOTONIC CRYSTAL FIBER BASED ON INDEX-MATCHING COUPLING

Tanmay Bhowmik, Annesha Maity

Abstract: In this paper, new type wideband large mode area (LMA), mono-mode holey fiber or photonic crystal fiber (PCF) based on indexmatching resonant-coupling is proposed by using the FEM (finite-element method). The novel design has been achieved for a wide wavelength from1.5 µm to 1.63 µm. Thus, the total operation bandwidth reaches 130 nm. The higher order mode resonant coupling loss of the proposed fiber is good enough within this wavelength range to maintain the mono-mode operation. The total effective area for the proposed fiber is larger than 2150µm². The proposed fiber exhibits a very less FM (fundamental mode or LP0 mode) loss about 10-3 dB/m and the HOM (higher order mode) resonant coupling loss is larger than 6.8dB/m at 1.55 µm. The large mode area can reduce optical intensities and thus the fiber design can gain more attraction in the field of fiber laser and amplifier based applications. Moreover, the broadband design which covers the key wavelength (1550 nm) for communication window, will pay attention to the manufacturer in the fiber optic communication

Keywords: Index-Matching Resonant-Coupling, Higher Order Mode Suppression, LMA (Large Mode Area) Fiber, Mono-Mode, Photonic Crystal Fiber (PCF).

DOI: https://doi.org/10.15623/ijret.2016.0503086