Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Cross-phase modulational instability of circularly polarized helical Bloch modes carrying optical vortices in a chiral three-core photonic crystal fiber

Not Accessible

Your library or personal account may give you access

Abstract

We report the first, to the best of our knowledge, observation of cross-phase modulational instability (XPMI) of circularly polarized helical Bloch modes carrying optical vortices in a twisted photonic crystal fiber with a three-fold symmetric core, formed by spinning the fiber preform during the draw. When the fiber is pumped by a superposition of left-circular polarization (LCP) and right-circular polarization (RCP) modes, a pair of orthogonal circularly polarized sidebands of opposite topological charge is generated. When, on the other hand, a pure LCP (or RCP) mode is launched, the XPMI gain is zero, and no sidebands are seen. This observation has not been seen before in any system and is unique to chiral structures with $ N $-fold rotational symmetry. The polarization state and topological charge of the generated sidebands are measured. By decomposing the helical Bloch modes into their azimuthal harmonics, we are able to deduce the selection rules for the appearance of modulational instability sidebands. We showed that the four waves in the nonlinear mixing process must exhibit the same set of azimuthal harmonic orders.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Full-field characterization of helical Bloch modes guided in twisted coreless photonic crystal fiber

P. Roth, G. K. L. Wong, M. H. Frosz, G. Ahmed, and P. St.J. Russell
Opt. Lett. 44(20) 5049-5052 (2019)

Generation of broadband circularly polarized supercontinuum light in twisted photonic crystal fibers

Rafal P. Sopalla, Gordon K. L. Wong, Nicolas Y. Joly, Michael H. Frosz, Xin Jiang, Goran Ahmed, and Philip St.J. Russell
Opt. Lett. 44(16) 3964-3967 (2019)

Circularly polarized guided modes in dielectrically chiral photonic crystal fiber

Junqing Li, Qiyao Su, and Yusheng Cao
Opt. Lett. 35(16) 2720-2722 (2010)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved