Realisation of photonic Hilbert transformer with a simple planar Bragg grating
Realisation of photonic Hilbert transformer with a simple planar Bragg grating
Photonic Hilbert transformers (PHTs) are desirable for the direct processing of optical signals at high speeds and operation bandwidths, allowing optical networks to outperform current electronic technologies. We practically demonstrate a photonic Hilbert transformer in planar geometry; utilising a pi-phase shift planar Bragg grating with proper apodization profile. The device is fabricated by direct UV grating writing technology in silica-on-silicon [1]. The PHT has a pi-phase shift at the zero point of the frequency response, whereas the amplitude remains constant. The pi-phase shift in PHT is simply induced by placing a pi-phase shift in the refractive index modulation. The constant amplitude is achieved by precise apodization of the grating coupling strength, while the apodization profile is given by [2]. With our current direct UV writing technology, the proposed grating can be fabricated in a much higher accuracy then the conventional fibre Bragg grating manufacturing technique. We will present our latest work on more complex apodized gratings to obtain the ideal realisable frequency and temporal responses for PHTs.
Sima, Chaotan
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Gates, J.C.
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Snow, B.D.
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Rogers, H.L.
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Zervas, M.N.
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Smith, P.G.R.
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Sima, Chaotan
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Gates, J.C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Snow, B.D.
369fd679-066f-46db-9d5c-aecaa7179a6d
Rogers, H.L.
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Zervas, M.N.
1840a474-dd50-4a55-ab74-6f086aa3f701
Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Sima, Chaotan, Gates, J.C., Snow, B.D., Rogers, H.L., Zervas, M.N. and Smith, P.G.R.
(2010)
Realisation of photonic Hilbert transformer with a simple planar Bragg grating.
Photon 10, , Southampton, United Kingdom.
23 - 26 Aug 2010.
1 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Photonic Hilbert transformers (PHTs) are desirable for the direct processing of optical signals at high speeds and operation bandwidths, allowing optical networks to outperform current electronic technologies. We practically demonstrate a photonic Hilbert transformer in planar geometry; utilising a pi-phase shift planar Bragg grating with proper apodization profile. The device is fabricated by direct UV grating writing technology in silica-on-silicon [1]. The PHT has a pi-phase shift at the zero point of the frequency response, whereas the amplitude remains constant. The pi-phase shift in PHT is simply induced by placing a pi-phase shift in the refractive index modulation. The constant amplitude is achieved by precise apodization of the grating coupling strength, while the apodization profile is given by [2]. With our current direct UV writing technology, the proposed grating can be fabricated in a much higher accuracy then the conventional fibre Bragg grating manufacturing technique. We will present our latest work on more complex apodized gratings to obtain the ideal realisable frequency and temporal responses for PHTs.
More information
e-pub ahead of print date: August 2010
Venue - Dates:
Photon 10, , Southampton, United Kingdom, 2010-08-23 - 2010-08-26
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 340459
URI: http://eprints.soton.ac.uk/id/eprint/340459
PURE UUID: b44700cf-e9cf-4742-9414-739faf267f2b
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Date deposited: 22 Jun 2012 08:59
Last modified: 15 Mar 2024 03:07
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Contributors
Author:
Chaotan Sima
Author:
B.D. Snow
Author:
H.L. Rogers
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