Abstract

We report on a new type of long-period-grating generated in a helical core fiber by bending. The grating arises from bend-induced modulation of an equivalent refractive index in the helical core with a period equal to the helix pitch. We experimentally demonstrate that such grating induces multiple resonant couplings between the fundamental modes guided in the central core and the helical side-core. We have also shown that by varying a direction of bending, one can generate the phase shifted grating. The experimental results are supported by numerical simulations based on the coupled mode equations.

© 2020 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Demonstration of the mode-selection rules obeyed in a single-helix helical long-period fiber grating

Peng Wang, Hua Zhao, Taishu Detani, Yuhta Tsuyuki, and Hongpu Li
Opt. Lett. 45(7) 1846-1849 (2020)

Discretized superimposed optical fiber long-period gratings

Cosimo Trono, Federico Valeri, and Francesco Baldini
Opt. Lett. 45(4) 807-810 (2020)

All-fiber bandwidth tunable ultra-broadband mode converters based on long-period fiber gratings and helical long-period gratings

Xinyi Zhao, Yunqi Liu, Zuyao Liu, and Chengbo Mou
Opt. Express 28(8) 11990-12000 (2020)

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

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 (7)

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 (10)

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

Metrics

You do not have subscription access to this journal. Article level metrics 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