Analysis of the Effect of Air Hole Diameter and Lattice Pitch in Optical Properties for Hexagonal Photonic Crystal Fiber

Abstract

We have investigated the different optical properties such as confinement loss, waveguide dispersion of a five rings hexagonal photonic crystal fiber under varied air hole diameter (d), lattice pitch (Λ), and air hole diameter to lattice pitch ratio for three different materials fused quartz glass, borosilicate glass and sapphire glass. We observed low confinement loss and high negative dispersion at higher d/Λ. Achieving high d/Λ can be done in two ways: increasing the air hole diameter or decreasing the lattice pitch. It has been observed, increasing the air hole diameter has significant effect over reducing lattice pitch in achieving low confinement loss. On the other hand, decreasing the lattice pitch over increasing the air hole diameter has significant effect in achieving high negative dispersion. It has also been found that, effective refractive index () decreases significantly when lattice pitch decreases.

Plasmon-Enhanced Refractometry Through Cladding Mode Excitation by a Fiber Bragg Grating in Photonic Crystal Fiber

“…The challenge to reduce the spectral width covered by broad frequency combs down to a few resonances of interest can be addressed by employing specialty fibers, such as photonic crystal fibers (PCFs). It is well known that the guiding properties of PCFs can be tuned by changing the lattice pitch and the air hole diameter [17]- [19], which makes them attractive for different applications including refractive index sensing [20] and biosensing [3], [21], [22]. However, many reports on PCFbased sensors were limited to numerical investigations [22], or involved post-processing procedures that would complicate their use in practice [23].…”

Study and Analysis of Photonic Crystal Fiber for Broadband Laser Source Design

“…The optical properties such as waveguide dispersion, confinement loss, and effective area also vary with the variation of the effective refractive index [2]. Previous research works testify that it is possible to optimize the optical properties through the variation in the air hole diameter and pitch of the designed PCF geometry [3]. Moreover, the effects of different types of air hole structure on the optical properties have been reported earlier [3][4][5][6].…”

“…Previous research works testify that it is possible to optimize the optical properties through the variation in the air hole diameter and pitch of the designed PCF geometry [3]. Moreover, the effects of different types of air hole structure on the optical properties have been reported earlier [3][4][5][6]. Nonlinear optics is the analysis and the study of the phenomena that takes place when the optical properties of a material system vary nonlinearly with the presence of light.…”