Optimization of hollow-core fibers with elliptical tubes for improved single-mode guidance

Kaushalram, A and Suchita, Y and Bhardwaj, A (2023) Optimization of hollow-core fibers with elliptical tubes for improved single-mode guidance. In: Optical Fiber Technology, 81 .

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Abstract

Hollow core fibers with elliptical tubes offer more design flexibility and can achieve better performance compared to their circular counterparts. We optimize the elliptical tubes of a hollow-core fiber to achieve a higher order mode extinction ratio (HOMER) exceeding 5500 along with a confinement loss of 0.012 dB/m in the telecommunication band; 4.7×10−4 dB/m with HOMER > 4300 in the visible band. We also derive an empirical relation between the structural parameters to obtain avoided crossings between the core higher order modes and the cladding modes to achieve the best single-mode guidance, besides achieving minimum confinement loss for the fundamental mode. We investigate the effect of bends on not just the confinement loss, but also on the HOMER. We have also included the dispersion and fabrication tolerances. These fibers find applications in quantum communication, sensing, and high-power laser delivery. © 2023 Elsevier Inc.

Item Type:	Journal Article
Publication:	Optical Fiber Technology
Publisher:	Academic Press Inc.
Additional Information:	The copyright for this article belongs to the Academic Press Inc.
Keywords:	High power lasers; Light extinction; Optical fibers, Antiresonant; Antiresonant-fiber; Avoided crossings; Confinement loss; Elliptical tubes; Extinction ratios; High order mode; High order mode extinction ratio; Higher-order-mode; Hollow core fiber, Quantum communication
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	12 Dec 2023 04:28
Last Modified:	12 Dec 2023 04:28
URI:	https://eprints.iisc.ac.in/id/eprint/83356

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