Abstract

We demonstrate high-order mode conversion in a few-mode fiber (FMF) via ${{\rm CO} _2}$ laser inscribed long-period fiber gratings (LPFGs) at both the 1.55 µm and 2 µm wavebands. At the 1.55 µm waveband, five high-order core modes (the ${{\rm LP}_{11}}$, ${{\rm LP}_{21}}$, ${{\rm LP}_{02}}$, ${{\rm LP}_{31}}$, and ${{\rm LP}_{12}}$ modes) can be coupled from the ${{\rm LP}_{01}}$ mode with high efficiency by the FMF-LPFGs. The orbital angular momentum beams with different topological charges $({\pm 1, \pm 2, \pm 3})$ are experimentally generated by adjusting the polarization controllers. At the 2 µm waveband, three high-order modes (the ${{\rm LP}_{11}}$, ${{\rm LP}_{21}}$, and ${{\rm LP}_{02}}$ mode) can be coupled by the FMF-LPFGs with different grating periods. The proposed LPFG-based mode converters could have a potential prospects in mode-division multiplexing and multiwindow broadband optical communication applications.

© 2020 Optical Society of America

Full Article  |  PDF Article
More Like This
Bandwidth optimization of cascaded long-period gratings for broadband mode conversion over 1.0-2.2 µm waveband

Zuyao Liu, Yunqi Liu, Xinyi Zhao, and Chengbo Mou
Opt. Express 28(21) 31882-31892 (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)

Multiple spatial and wavelength conversion operations based on a frequency-degenerated intermodal four-wave mixing process in a graded-index 6-LP few-mode fiber

H. Zhang, M. Bigot-Astruc, P. Sillard, G. Millot, B. Kibler, and J. Fatome
Appl. Opt. 59(18) 5497-5505 (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 (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

Tables (2)

You do not have subscription access to this journal. Article tables 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 (3)

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