The University of Southampton
University of Southampton Institutional Repository

Experimental investigation of large time-bandwidth product photonic Hilbert transformer based on compact Bragg grating

Experimental investigation of large time-bandwidth product photonic Hilbert transformer based on compact Bragg grating
Experimental investigation of large time-bandwidth product photonic Hilbert transformer based on compact Bragg grating
We propose and experimentally demonstrate an integrated photonic Hilbert transformer (PHT) with substantial time bandwidth product (TBP). Due to the current substrate material and fabrication technique, PHT devices find it challenging to achieve ultrawide operative bandwidth while maintaining the minimum bandwidth level presented as the narrow central notch in frequency response. This implies that the TBP value is restricted. Here, we investigate the synthesized refractive index profile in compact Bragg grating design for theoretical simulation and the linearity-enhanced direct UV grating writing fabrication for experimental implementation. The fabricated device could process microwave photonic signals as Hilbert transformation between 50 GHz and 3 THz, with the TBP above 60, which is the largest experimental data to the best of our knowledge. This technique allows the PHT with improved spectral performance to be suitable for analog all-optical signal processing.
1943-0655
1-8
Liu, B.
432d1550-1946-452b-aa84-2a80963cafbf
Sima, C.
5d4e6b29-c400-4881-952e-63d0768aee6f
Yang, W.
1cf3160d-b41e-4228-8909-c1580b31462d
Cai, B.
2fda4c47-626f-4a72-bea7-bf0b59bdd934
Liu, D.
2d5ea910-b280-4e20-8a8f-889b4b153b4c
Yu, Y.
dd85cd77-4fc3-4972-b9b8-cc785af3be64
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, B.
432d1550-1946-452b-aa84-2a80963cafbf
Sima, C.
5d4e6b29-c400-4881-952e-63d0768aee6f
Yang, W.
1cf3160d-b41e-4228-8909-c1580b31462d
Cai, B.
2fda4c47-626f-4a72-bea7-bf0b59bdd934
Liu, D.
2d5ea910-b280-4e20-8a8f-889b4b153b4c
Yu, Y.
dd85cd77-4fc3-4972-b9b8-cc785af3be64
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, B., Sima, C., Yang, W., Cai, B., Liu, D., Yu, Y., Gates, J.C., Zervas, M.N. and Smith, P.G.R. (2016) Experimental investigation of large time-bandwidth product photonic Hilbert transformer based on compact Bragg grating. IEEE Photonics Journal, 8 (4), 1-8, [7803907]. (doi:10.1109/JPHOT.2016.2590941).

Record type: Article

Abstract

We propose and experimentally demonstrate an integrated photonic Hilbert transformer (PHT) with substantial time bandwidth product (TBP). Due to the current substrate material and fabrication technique, PHT devices find it challenging to achieve ultrawide operative bandwidth while maintaining the minimum bandwidth level presented as the narrow central notch in frequency response. This implies that the TBP value is restricted. Here, we investigate the synthesized refractive index profile in compact Bragg grating design for theoretical simulation and the linearity-enhanced direct UV grating writing fabrication for experimental implementation. The fabricated device could process microwave photonic signals as Hilbert transformation between 50 GHz and 3 THz, with the TBP above 60, which is the largest experimental data to the best of our knowledge. This technique allows the PHT with improved spectral performance to be suitable for analog all-optical signal processing.

Text
07511720 - Version of Record
Available under License Creative Commons Attribution.
Download (561kB)

More information

Accepted/In Press date: 9 July 2016
e-pub ahead of print date: 13 July 2016
Published date: August 2016

Identifiers

Local EPrints ID: 441672
URI: http://eprints.soton.ac.uk/id/eprint/441672
ISSN: 1943-0655
PURE UUID: 86c3fd69-3442-4b45-b138-e0905b2e9da2
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

Catalogue record

Date deposited: 23 Jun 2020 16:56
Last modified: 18 Feb 2021 16:56

Export record

Altmetrics

Contributors

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

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×