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Integrated reconfigurable photonic filters based on interferometric fractional Hilbert transforms

Integrated reconfigurable photonic filters based on interferometric fractional Hilbert transforms
Integrated reconfigurable photonic filters based on interferometric fractional Hilbert transforms
In this paper, we present integrated reconfigurable photonic filters using fractional Hilbert transformers (FrHTs) and optical phase tuning structure within the silica-on-silicon platform. The proposed structure, including grating-based FrHTs, an X-coupler, and a pair of thermal tuning filaments, is fabricated through the direct UV grating writing technique. The thermal tuning effect is realized by the controllable microheaters located on the two arms of the X-coupler. We investigate the 200 GHz maximum bandwidth photonic FrHTs based on apodized planar Bragg gratings, and analyze the reflection spectrum responses. Through device integration and thermal modulation, the device could operate as photonic notch filters with 5 GHz linewidth and controllable single sideband suppression filters with measured 12 dB suppression ratio. A 50 GHz instantaneous frequency measuring system using this device is also schematically proposed and analyzed with potential 3 dB measurement improvement. The device could be configured with these multiple functions according to need. The reconfigurable structure has great potential in ultrafast all-optical signal processing fields.
0003-6935
7978-7984
Sima, C.
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Cai, B.
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Liu, B.
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Gao, Y.
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Gates, J.C.
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Zervas, M.N.
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Smith, P.G.R.
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Liu, D.
1aff35db-e0f2-41eb-a92b-14e4e2d884a1
Sima, C.
5f93b823-509d-4198-b3d6-a45e7e8cca0c
Cai, B.
2fda4c47-626f-4a72-bea7-bf0b59bdd934
Liu, B.
c99d0f80-7480-4069-a77c-0e79c622e9e4
Gao, Y.
3f048356-567d-4308-853f-d98fabfcb6fb
Gates, J.C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Zervas, M.N.
1840a474-dd50-4a55-ab74-6f086aa3f701
Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Liu, D.
1aff35db-e0f2-41eb-a92b-14e4e2d884a1

Sima, C., Cai, B., Liu, B., Gao, Y., Gates, J.C., Zervas, M.N., Smith, P.G.R. and Liu, D. (2017) Integrated reconfigurable photonic filters based on interferometric fractional Hilbert transforms. Applied Optics, 56 (28), 7978-7984. (doi:10.1364/AO.56.007978).

Record type: Article

Abstract

In this paper, we present integrated reconfigurable photonic filters using fractional Hilbert transformers (FrHTs) and optical phase tuning structure within the silica-on-silicon platform. The proposed structure, including grating-based FrHTs, an X-coupler, and a pair of thermal tuning filaments, is fabricated through the direct UV grating writing technique. The thermal tuning effect is realized by the controllable microheaters located on the two arms of the X-coupler. We investigate the 200 GHz maximum bandwidth photonic FrHTs based on apodized planar Bragg gratings, and analyze the reflection spectrum responses. Through device integration and thermal modulation, the device could operate as photonic notch filters with 5 GHz linewidth and controllable single sideband suppression filters with measured 12 dB suppression ratio. A 50 GHz instantaneous frequency measuring system using this device is also schematically proposed and analyzed with potential 3 dB measurement improvement. The device could be configured with these multiple functions according to need. The reconfigurable structure has great potential in ultrafast all-optical signal processing fields.

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Integrated Reconfigurable Photonic Filters based on - Accepted Manuscript
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Accepted/In Press date: 5 September 2017
e-pub ahead of print date: 7 September 2017
Published date: October 2017

Identifiers

Local EPrints ID: 415586
URI: https://eprints.soton.ac.uk/id/eprint/415586
ISSN: 0003-6935
PURE UUID: 17572968-e66e-4fa1-83bf-2c58cff3271b
ORCID for J.C. Gates: ORCID iD orcid.org/0000-0001-8671-5987
ORCID for M.N. Zervas: ORCID iD orcid.org/0000-0002-0651-4059
ORCID for P.G.R. Smith: ORCID iD orcid.org/0000-0003-0319-718X

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Date deposited: 15 Nov 2017 17:30
Last modified: 03 Dec 2019 05:45

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Contributors

Author: C. Sima
Author: B. Cai
Author: B. Liu
Author: Y. Gao
Author: J.C. Gates ORCID iD
Author: M.N. Zervas ORCID iD
Author: P.G.R. Smith ORCID iD
Author: D. Liu

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