Continuous-relief diffractive microlenses for laser beam focusing

Matthew Day; Kaushal Choonee; David Cox; Mark Thompson; Graham Marshall; Alastair G. Sinclair

doi:10.1364/OE.25.026987

Continuous-relief diffractive microlenses for laser beam focusing

Matthew Day, Kaushal Choonee^*, David Cox, Mark Thompson, Graham Marshall, Alastair G. Sinclair

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

5 Citations (Scopus)

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Abstract

Microscale, continuous-profile, diffractive lenses have been fabricated and characterized. Lenses designed to operate at λ₀ = 405 nm were created by focused ion beam milling of a glass substrate. The micro-structured profile was analysed by confocal microscopy and optical performance was quantified by measurements of the transmitted laser beam profile. Lenses of size 125 µm × 125 µm, containing up to 18 annuli and focusing at 400 µm, 450 µm and 500 µm have been made. Measured focused beams were in excellent agreement with the predicted performance. A maximum di raction e ciency of 84 % and side-lobe suppression down to the 10⁻⁴ level can be achieved. The suitability of the lenses for interfacing with trapped-ion systems is outlined.

Original language	English
Pages (from-to)	26987-26999
Number of pages	13
Journal	Optics Express
Volume	25
Issue number	22
Early online date	20 Oct 2017
DOIs	https://doi.org/10.1364/OE.25.026987
Publication status	Published - 30 Oct 2017

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title = "Continuous-relief diffractive microlenses for laser beam focusing",

abstract = "Microscale, continuous-profile, diffractive lenses have been fabricated and characterized. Lenses designed to operate at λ0 = 405 nm were created by focused ion beam milling of a glass substrate. The micro-structured profile was analysed by confocal microscopy and optical performance was quantified by measurements of the transmitted laser beam profile. Lenses of size 125 µm × 125 µm, containing up to 18 annuli and focusing at 400 µm, 450 µm and 500 µm have been made. Measured focused beams were in excellent agreement with the predicted performance. A maximum di raction e ciency of 84 % and side-lobe suppression down to the 10−4 level can be achieved. The suitability of the lenses for interfacing with trapped-ion systems is outlined.",

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T1 - Continuous-relief diffractive microlenses for laser beam focusing

AU - Day, Matthew

AU - Choonee, Kaushal

AU - Cox, David

AU - Thompson, Mark

AU - Marshall, Graham

AU - Sinclair, Alastair G.

PY - 2017/10/30

Y1 - 2017/10/30

N2 - Microscale, continuous-profile, diffractive lenses have been fabricated and characterized. Lenses designed to operate at λ0 = 405 nm were created by focused ion beam milling of a glass substrate. The micro-structured profile was analysed by confocal microscopy and optical performance was quantified by measurements of the transmitted laser beam profile. Lenses of size 125 µm × 125 µm, containing up to 18 annuli and focusing at 400 µm, 450 µm and 500 µm have been made. Measured focused beams were in excellent agreement with the predicted performance. A maximum di raction e ciency of 84 % and side-lobe suppression down to the 10−4 level can be achieved. The suitability of the lenses for interfacing with trapped-ion systems is outlined.

AB - Microscale, continuous-profile, diffractive lenses have been fabricated and characterized. Lenses designed to operate at λ0 = 405 nm were created by focused ion beam milling of a glass substrate. The micro-structured profile was analysed by confocal microscopy and optical performance was quantified by measurements of the transmitted laser beam profile. Lenses of size 125 µm × 125 µm, containing up to 18 annuli and focusing at 400 µm, 450 µm and 500 µm have been made. Measured focused beams were in excellent agreement with the predicted performance. A maximum di raction e ciency of 84 % and side-lobe suppression down to the 10−4 level can be achieved. The suitability of the lenses for interfacing with trapped-ion systems is outlined.

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DO - 10.1364/OE.25.026987

M3 - Article (Academic Journal)

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JO - Optics Express

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Continuous-relief diffractive microlenses for laser beam focusing

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Programme Grant: Engineering Photonic Quantum Technologies.

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Continuous-relief diffractive microlenses for laser beam focusing

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Programme Grant: Engineering Photonic Quantum Technologies.

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