Holographically fabricated out-of-plane blazed gratings and channel waveguides in silica for integrated free space beam delivery
Holographically fabricated out-of-plane blazed gratings and channel waveguides in silica for integrated free space beam delivery
Grating couplers are commonly utilized in integrated optics for generating free space beams and facilitating localized interactions with optical systems such as atom or ion traps. However, etched devices often exhibit small-scale inconsistencies, which are further amplified by the high index contrast of the devices. These inconsistencies can lead to effective index variations and phase errors across the fabricated devices and limit the size of successful devices to sub-millimetre scale. In this letter, we present a phase-controlled direct UV writing technique using a pulsed 213 nm laser to fabricate an out-of-plane blazed grating coupler in a doped photosensitive silica-on-silicon platform. We demonstrate devices capable of delivering large diameter (few mm) collimated beams, as well as focusing beams, into free space from a waveguide input.
Ahmed, Salman
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Gow, Paul C.
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Field, James
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Ko, Dong-Woo
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Bannerman, Rex
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Horak, Peter
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Holmes, Christopher
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Smith, Peter G.R.
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Gawith, Corin
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Gates, James
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Ahmed, Salman
2a627fc7-aca4-4380-85d8-90349bbf9e2b
Gow, Paul C.
193394b1-fe2d-41de-a9aa-6de7e5925b18
Field, James
df955b32-3fe1-4aca-866f-95603a4c70f7
Ko, Dong-Woo
14f06031-380b-4d7c-a965-a8f670c1806b
Bannerman, Rex
7f7d5c3e-8e5d-45d5-8fd7-8d1511330e08
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Gawith, Corin
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Gates, James
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Ahmed, Salman, Gow, Paul C., Field, James, Ko, Dong-Woo, Bannerman, Rex, Horak, Peter, Holmes, Christopher, Smith, Peter G.R., Gawith, Corin and Gates, James
(2024)
Holographically fabricated out-of-plane blazed gratings and channel waveguides in silica for integrated free space beam delivery.
Optics Letters.
Abstract
Grating couplers are commonly utilized in integrated optics for generating free space beams and facilitating localized interactions with optical systems such as atom or ion traps. However, etched devices often exhibit small-scale inconsistencies, which are further amplified by the high index contrast of the devices. These inconsistencies can lead to effective index variations and phase errors across the fabricated devices and limit the size of successful devices to sub-millimetre scale. In this letter, we present a phase-controlled direct UV writing technique using a pulsed 213 nm laser to fabricate an out-of-plane blazed grating coupler in a doped photosensitive silica-on-silicon platform. We demonstrate devices capable of delivering large diameter (few mm) collimated beams, as well as focusing beams, into free space from a waveguide input.
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In preparation date: 2024
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Local EPrints ID: 485654
URI: http://eprints.soton.ac.uk/id/eprint/485654
ISSN: 0146-9592
PURE UUID: 49eae39b-535b-4bfb-95c4-bfc27acab460
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Date deposited: 13 Dec 2023 17:37
Last modified: 26 Jul 2024 01:45
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