Out-of-plane beam shaping with UV-written tilted Bragg gratings for beam delivery on quantum chips
Out-of-plane beam shaping with UV-written tilted Bragg gratings for beam delivery on quantum chips
We theoretically and numerically investigate the performance of tilted Bragg gratings in planar waveguides, fabricated by direct UV writing in photosensitive silica, to couple light out of a chip. An analytic expression is derived for the coupling efficiency and validated numerically by finite element simulations. Using the analytic result, we can design gratings to generate output beams in free space of any specific shape and calculate their overall power coupling efficiency. Our simulations indicate that for currently achievable grating index contrasts devices of millimeter length are most suitable for this technology.
44628-44639
Ko, Dong-Woo
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Ahmed, Qazi
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Field, James
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Gates, James C.
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Horak, Peter
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Ko, Dong-Woo
aae111cb-4988-4b76-9ab2-e077d36538b3
Ahmed, Qazi
2a627fc7-aca4-4380-85d8-90349bbf9e2b
Field, James
87ce1146-333d-489c-839d-b6f654049abc
Gates, James C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Ko, Dong-Woo, Ahmed, Qazi, Field, James, Gates, James C. and Horak, Peter
(2022)
Out-of-plane beam shaping with UV-written tilted Bragg gratings for beam delivery on quantum chips.
Optics Express, 30 (25), .
(doi:10.1364/OE.469501).
Abstract
We theoretically and numerically investigate the performance of tilted Bragg gratings in planar waveguides, fabricated by direct UV writing in photosensitive silica, to couple light out of a chip. An analytic expression is derived for the coupling efficiency and validated numerically by finite element simulations. Using the analytic result, we can design gratings to generate output beams in free space of any specific shape and calculate their overall power coupling efficiency. Our simulations indicate that for currently achievable grating index contrasts devices of millimeter length are most suitable for this technology.
Text
Out-of-plane beam shaping with UV-written tilted Bragg gratings for beam delivery on quantum chips
- Accepted Manuscript
Available under License Other.
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Accepted/In Press date: 8 August 2022
e-pub ahead of print date: 22 November 2022
Identifiers
Local EPrints ID: 469551
URI: http://eprints.soton.ac.uk/id/eprint/469551
ISSN: 1094-4087
PURE UUID: 5fecd42d-bc94-424e-9f61-51b8c35f5977
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Date deposited: 20 Sep 2022 16:35
Last modified: 17 Mar 2024 07:28
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Author:
Qazi Ahmed
Author:
James Field
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