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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 17 — Sep. 1, 2014
  • pp: 5232–5235

Tunable, nondispersive optical filter using photonic Hilbert transformation

Hamed Pishvai Bazargani, María del Rosario Fernández-Ruiz, and José Azaña  »View Author Affiliations

Optics Letters, Vol. 39, Issue 17, pp. 5232-5235 (2014)

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We propose and numerically demonstrate a new design concept for implementing nondispersive complementary (band-pass/band-reject) optical filters with a wide range of bandwidth tunability. The device consists of two photonic Hilbert transformers (PHTs) incorporated into a Michelson interferometer (MI). By controlling the central frequency of PHTs with respect to each other, both the central frequency and the spectral width of the rejection/pass bands of the filter are proved to be tunable. Bandwidth tuning from 260 MHz to 60 GHz is numerically demonstrated using two readily feasible fiber Bragg grating-based PHTs. The designed filter offers a high extinction ratio between the pass band and rejection band (>20dB in the narrow-band filtering case) with a very sharp transition with a slope of 170dB/GHz from rejection to pass band.

© 2014 Optical Society of America

OCIS Codes
(230.0230) Optical devices : Optical devices
(230.1480) Optical devices : Bragg reflectors
(350.2460) Other areas of optics : Filters, interference
(350.2770) Other areas of optics : Gratings
(350.6980) Other areas of optics : Transforms

ToC Category:
Optical Devices

Original Manuscript: July 16, 2014
Revised Manuscript: August 5, 2014
Manuscript Accepted: August 5, 2014
Published: August 29, 2014

Hamed Pishvai Bazargani, María del Rosario Fernández-Ruiz, and José Azaña, "Tunable, nondispersive optical filter using photonic Hilbert transformation," Opt. Lett. 39, 5232-5235 (2014)

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