Abstract

The phase differences between the transverse modes of an optical fiber can be altered all-optically by intermodal cross-phase modulation. In this Letter, we experimentally demonstrate this effect with ultrashort laser pulses. An ultrashort probe pulse, guided in both modes of a two-mode fiber, is co-propagating and temporally overlapping with an ultrashort control pulse, guided in the fundamental mode only and centered at a separate wavelength. The use of ultrashort pulses allows for a notable phase shift at a 33-fold reduced control pulse energy and a 173-fold reduced fiber length, compared to previous experiments. A total phase shift of 0.285π between the two probe modes was achieved at a 9 nJ control pulse energy in a 19 cm long two-mode graded-index fiber. Additionally, the capability of this scheme to switch ultrashort pulses in an all-optical manner was investigated. A modulation depth of 50% was achieved, limited by temporal nonlinear effects.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Low-power broadband all-optical switching via intermodal cross-phase modulation in integrated optical waveguides

Niklas M. Lüpken, Tim Hellwig, Martin Schnack, Jörn P. Epping, Klaus-J. Boller, and Carsten Fallnich
Opt. Lett. 43(8) 1631-1634 (2018)

Ultrafast, low-power, all-optical switching via birefringent phase-matched transverse mode conversion in integrated waveguides

Tim Hellwig, Jörn P. Epping, Martin Schnack, Klaus.-J. Boller, and Carsten Fallnich
Opt. Express 23(15) 19189-19201 (2015)

Ultrafast two-color all-optical transverse mode conversion in a graded-index fiber

Martin Schnack, Tim Hellwig, Maximilian Brinkmann, and Carsten Fallnich
Opt. Lett. 40(20) 4675-4678 (2015)

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 (3)

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

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