Abstract

We present an antiresonant hollow-core fiber-based bandpass optical filter. The device is realized by tapering down a section of tubular hollow-core fiber to a ratio of less than 0.5. Sweeping of the tube wall thickness-induced resonant bands in the down- and up-transition sections of the taper suppresses the blue side of the spectrum, while the red side filtering exploits the increased confinement loss at the taper waist that depends sharply on the wavelength-to-core-diameter ratio. These working principles of the filter make it possible to customize the location and width of the passband by tailoring the fiber design and taper profile. We achieve a 350-nm-wide bandpass filter with the minimum insertion loss of 1.3 dB in the passband and up to 40 dB suppression in the lossbands. We anticipate the filter to become one of the essential components in all-hollow-core fiberized optical systems.

© 2021 Optica Publishing Group

Full Article  |  PDF Article
More Like This
Tunable in-line fiber-optic bandpass filter

K. McCallion, W. Johnstone, and G. Fawcett
Opt. Lett. 19(8) 542-544 (1994)

Ultrasmooth, biocompatible, and removable nanocoating for hollow-core microstructured optical fibers

Timur Ermatov, Marina Novoselova, Julia Skibina, Andrey Machnev, Dmitry Gorin, and Roman E. Noskov
Opt. Lett. 46(19) 4828-4831 (2021)

Anti-resonant hollow-core fiber fusion spliced to laser gain fiber for high-power beam delivery

Charu Goel, Huizi Li, Muhammad Rosdi Abu Hassan, Wonkeun Chang, and Seongwoo Yoo
Opt. Lett. 46(17) 4374-4377 (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 Optica member, or as an authorized user of your institution.

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

Data availability

Data underlying the results presented in this Letter 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 Optica member, or as an authorized user of your institution.

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

Figures (4)

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

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

Equations (2)

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

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