Strong circular dichroism for the HE11 mode in twisted single-ring hollow-core photonic crystal fiber

P. Roth; Y. Chen; M. C. Günendi; R. Beravat; N. N. Edvalath; M. H. Frosz; G. Ahmed; G. K. L. Wong; P. St. J. Russell

doi:10.1364/optica.5.001315

Strong circular dichroism for the HE₁₁ mode in twisted single-ring hollow-core photonic crystal fiber

P. Roth, Y. Chen, M. C. Günendi, R. Beravat, N. N. Edvalath, M. H. Frosz, G. Ahmed, G. K. L. Wong^*, P. St. J. Russell

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

We report a series of experimental, analytical, and numerical studies demonstrating strong circular dichroism for the HE₁₁-like core mode in helically twisted hollow-core single-ring photonic crystal fiber (SR-PCF), formed by spinning the preform during fiber drawing. In the SR-PCFs studied, the hollow core is surrounded by a single ring of nontouching capillaries. Coupling between these capillaries results in the formation of helical Bloch modes carrying orbital angular momentum. When twisted, strong circular birefringence appears in the ring, so that coupling to the core mode is possible for only one circular polarization state. The result is a SR-PCF that acts as a circular polarizer, offering 1.4 dB/m for the low-loss polarization state and 9.7 dB/m for the high-loss state over a 25 nm band centered at 1593 nm wavelength. In addition, we report for the first time that the vector fields of the helical Bloch modes are perfectly periodic when evaluated in cylindrical coordinates. Such fibers have many potential applications, such as generating circularly polarized light in gas-filled SR-PCF and realizing polarizing elements in the deep and vacuum ultraviolet.

Original language	English
Pages (from-to)	1315-1321
Number of pages	7
Journal	Optica
Volume	5
Issue number	10
DOIs	https://doi.org/10.1364/optica.5.001315
Publication status	Published - 18 Oct 2018
Externally published	Yes

Keywords

photonic crystal fibers
polarization
polarization-maintaining fibers
optical vortices
fiber design and fabrication

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10.1364/optica.5.001315Licence: CC BY

2018 09 23 Roth et al Dichroism finalFinal published version, 1.5 MBLicence: CC BY

Cite this

@article{bb14a60653ea479786ab14489c80a23b,

title = "Strong circular dichroism for the HE11 mode in twisted single-ring hollow-core photonic crystal fiber",

abstract = "We report a series of experimental, analytical, and numerical studies demonstrating strong circular dichroism for the HE11-like core mode in helically twisted hollow-core single-ring photonic crystal fiber (SR-PCF), formed by spinning the preform during fiber drawing. In the SR-PCFs studied, the hollow core is surrounded by a single ring of nontouching capillaries. Coupling between these capillaries results in the formation of helical Bloch modes carrying orbital angular momentum. When twisted, strong circular birefringence appears in the ring, so that coupling to the core mode is possible for only one circular polarization state. The result is a SR-PCF that acts as a circular polarizer, offering 1.4 dB/m for the low-loss polarization state and 9.7 dB/m for the high-loss state over a 25 nm band centered at 1593 nm wavelength. In addition, we report for the first time that the vector fields of the helical Bloch modes are perfectly periodic when evaluated in cylindrical coordinates. Such fibers have many potential applications, such as generating circularly polarized light in gas-filled SR-PCF and realizing polarizing elements in the deep and vacuum ultraviolet.",

keywords = "photonic crystal fibers, polarization, polarization-maintaining fibers, optical vortices, fiber design and fabrication",

author = "P. Roth and Y. Chen and G{\"u}nendi, \{M. C.\} and R. Beravat and Edvalath, \{N. N.\} and Frosz, \{M. H.\} and G. Ahmed and Wong, \{G. K. L.\} and Russell, \{P. St. J.\}",

year = "2018",

month = oct,

day = "18",

doi = "10.1364/optica.5.001315",

language = "English",

volume = "5",

pages = "1315--1321",

journal = "Optica",

issn = "2334-2536",

publisher = "Optica Publishing Group (formerly OSA)",

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TY - JOUR

T1 - Strong circular dichroism for the HE11 mode in twisted single-ring hollow-core photonic crystal fiber

AU - Roth, P.

AU - Chen, Y.

AU - Günendi, M. C.

AU - Beravat, R.

AU - Edvalath, N. N.

AU - Frosz, M. H.

AU - Ahmed, G.

AU - Wong, G. K. L.

AU - Russell, P. St. J.

PY - 2018/10/18

Y1 - 2018/10/18

N2 - We report a series of experimental, analytical, and numerical studies demonstrating strong circular dichroism for the HE11-like core mode in helically twisted hollow-core single-ring photonic crystal fiber (SR-PCF), formed by spinning the preform during fiber drawing. In the SR-PCFs studied, the hollow core is surrounded by a single ring of nontouching capillaries. Coupling between these capillaries results in the formation of helical Bloch modes carrying orbital angular momentum. When twisted, strong circular birefringence appears in the ring, so that coupling to the core mode is possible for only one circular polarization state. The result is a SR-PCF that acts as a circular polarizer, offering 1.4 dB/m for the low-loss polarization state and 9.7 dB/m for the high-loss state over a 25 nm band centered at 1593 nm wavelength. In addition, we report for the first time that the vector fields of the helical Bloch modes are perfectly periodic when evaluated in cylindrical coordinates. Such fibers have many potential applications, such as generating circularly polarized light in gas-filled SR-PCF and realizing polarizing elements in the deep and vacuum ultraviolet.

AB - We report a series of experimental, analytical, and numerical studies demonstrating strong circular dichroism for the HE11-like core mode in helically twisted hollow-core single-ring photonic crystal fiber (SR-PCF), formed by spinning the preform during fiber drawing. In the SR-PCFs studied, the hollow core is surrounded by a single ring of nontouching capillaries. Coupling between these capillaries results in the formation of helical Bloch modes carrying orbital angular momentum. When twisted, strong circular birefringence appears in the ring, so that coupling to the core mode is possible for only one circular polarization state. The result is a SR-PCF that acts as a circular polarizer, offering 1.4 dB/m for the low-loss polarization state and 9.7 dB/m for the high-loss state over a 25 nm band centered at 1593 nm wavelength. In addition, we report for the first time that the vector fields of the helical Bloch modes are perfectly periodic when evaluated in cylindrical coordinates. Such fibers have many potential applications, such as generating circularly polarized light in gas-filled SR-PCF and realizing polarizing elements in the deep and vacuum ultraviolet.

KW - photonic crystal fibers

KW - polarization

KW - polarization-maintaining fibers

KW - optical vortices

KW - fiber design and fabrication

U2 - 10.1364/optica.5.001315

DO - 10.1364/optica.5.001315

M3 - Article

SN - 2334-2536

VL - 5

SP - 1315

EP - 1321

JO - Optica

JF - Optica

IS - 10

ER -