Abstract

Gaussian-beam-like bundles of semi-guided waves propagating in a dielectric slab can excite modes with high-order optical angular momentum supported by a circular fiber. We consider a multimode step-index fiber with a high-index coating, where the waves in the slab are evanescently coupled to the modes of the fiber. Conditions for effective resonant interaction are identified. Based on a hybrid analytical–numerical coupled mode model, our simulations predict that substantial fractions of the input power can be focused into waves with specific orbital angular momentum, of excellent purity, with a clear distinction between degenerate modes with opposite vorticity.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Toward generation of mid-infrared orbital angular momentum beams by tailoring four-wave mixing in chalcogenide photonic crystal fiber

Weiqing Gao, Wenhui Jiang, Liang Tong, Wenwen Dai, Shaoqing Liu, Wu Chen, Zhengxiong Zhang, Xiaohui Ma, Yong Zhou, Wei Zhang, Wentan Fang, and Meisong Liao
J. Opt. Soc. Am. B 38(3) 692-698 (2021)

Oblique quasi-lossless excitation of a thin silicon slab waveguide: a guided-wave variant of an anti-reflection coating

Manfred Hammer, Lena Ebers, and Jens Förstner
J. Opt. Soc. Am. B 36(9) 2395-2401 (2019)

High-order orbital angular momentum generation in a helically twisted pig-nose-shaped core microstructured optical fiber

Mingjie Cui, Zhifeng Mo, Nan Zhao, Changming Xia, Zhiyun Hou, and Guiyao Zhou
Opt. Express 29(5) 6542-6552 (2021)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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 OSA member, or as an authorized user of your institution.

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

Figures (11)

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

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

Equations (7)

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

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