Abstract

A new kind of helical long-period grating (HLPG) written by using a CO2 laser is proposed and experimentally demonstrated, in which a sapphire tube (to be used as a miniature oven with a constant temperature inside) is specially utilized in place of the commonly used ZnSe focused-lens. The proposed method allows fabrication of a HLPG in a thinned fiber with a diameter smaller than several tens of micrometers. As an application of this kind of HLPG, a unique fiber sensor that allows for temperature-insensitive measurement of the refractive index is proposed and experimentally demonstrated, which is based on utilization of two cascaded HLPGs but with different transverse diameters.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Flat-top band-rejection filter based on two successively-cascaded helical fiber gratings

Gen. Inoue, Peng Wang, and Hongpu Li
Opt. Express 24(5) 5442-5447 (2016)

Optimal design and fabrication of multichannel helical long-period fiber gratings based on phase-only sampling method

Chengliang Zhu, Shoma Ishikami, Peng Wang, Hua Zhao, and Hongpu Li
Opt. Express 27(3) 2281-2291 (2019)

Analysis for the phase-diffusion effect in a phase-shifted helical long-period fiber grating and its pre-compensation

Hua Zhao, Peng Wang, Chengliang Zhu, Ramanathan Subramanian, and Hongpu Li
Opt. Express 25(16) 19085-19093 (2017)

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

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