Monolithic thin-film lithium niobate broadband spectrometer with one nanometre resolution
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Date
2024
Publication Type
Journal Article
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yes
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Abstract
Miniaturised optical spectrometers are attractive due to their small footprint, low weight, robustness and stability even in harsh environments such as space or industrial facilities. We report on a stationary-wave integrated Fourier-transform spectrometer featuring a measured optical bandwidth of 325 nm and a theoretical spectral resolution of 1.2 nm. We fabricate and test on lithium niobate-on-insulator to take full advantage of the platform, namely electro-optic modulation, broad transparency range and the low optical loss achieved thanks to matured fabrication techniques. We use the electro-optic effect and develop innovative layouts to overcome the undersampling limitations and improve the spectral resolution, thus providing a framework to enhance the performance of all devices sharing the same working principle. With our work, we add another important element to the portfolio of integrated lithium-niobate optical devices as our spectrometer can be combined with multiple other building blocks to realise functional, monolithic and compact photonic integrated circuits.
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published
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Journal / series
Volume
15 (1)
Pages / Article No.
2330
Publisher
Nature
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Infrared spectroscopy; Integrated optics; Sensors
Organisational unit
09531 - Grange, Rachel / Grange, Rachel
02205 - FIRST-Lab / FIRST Center for Micro- and Nanoscience
06226 - ScopeM - Cryo Electron Microscopy Unit / ScopeM - Cryo Electron Microscopy Unit
Notes
Funding
194693 - Maturing and scaling up fabrication of lithium-niobate-based integrated photonic sensors - LINIOS (SNF)
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