Highly birefringent do-octagonal photonic crystal fibers with ultra flattened zero dispersion for supercontinuum generation

Pranaw Kumar,Kokou Firmin Fiaboe,Jibendu Sekhar Roy

doi:10.1590/2179-10742019v18i11454

Abstract

Abstract Photonic crystal fiber (PCF) structures with do-octagonal geometry have been studied. These do-octagonal PCF structure have smaller circular holes arranged in rhombic fashion at its centre. Moreover, these small holes are doped with materials like butanol, ethanol, methanol and propanol. Do-octagonal PCF structures doped with methanol and air filled structure report very high birefringence. Ultra flattened zero dispersion has been achieved by all the simulated structures. Besides, low confinement loss and large nonlinearity have also been reported. Numerical simulation for supercontinuum generation has been performed. Supercontinuum spectra obtained for peak power 1 kW, 2 kW, 5 kW and 10 kW are 650 nm, 950 nm, 1450 nm and 2050 nm respectively.

Highlights

Optical properties in Photonic crystal fiber (PCF) can be tailored to obtain desire results
SIMULATION AND RESULTS Simulated PCF structures have circular holes arranged in rhombic fashion
Do-octagonal structure with air hole and do-octagonal PCF structure dopped with methanol report highest birefringence in comparison to other PCF structures studied in this work

Summary

Introduction

Optical properties in PCF can be tailored to obtain desire results It can be achieved by designing a particular pattern or arrangement of holes and by changing the dimension of the hole. Photonic crystal fiber due to their extraordinary properties compared to standard optical fibers has drawn the attention of many researchers[1]-[4] These properties include chromatic dispersion [5], birefringence [6], ultra low loss [7], endless single mode propagation [8], large nonlinear co-efficient [9] and effective mode area [10]. Researchers have reported high birefringence by using squeezed crystal lattice In this structure number of holes are different along two orthogonal axes [12].

Methods

Results

Conclusion