Dr. Edoardo Alberti Profile

Dr. Edoardo Alberti

System Engineer at PMOD WRC

SPIE Involvement:

Author

Proceedings Article | 30 June 2021 Open Access

Focal Plane Array Spectrometer FPAS: preliminary development results and recommendations

M. Madi, G. Osowiecki, E. Alberti, H. P. Herzig

Proceedings Volume 11852, 118526V (2021) https://doi.org/10.1117/12.2604387

KEYWORDS: Waveguides, Spectroscopy, Staring arrays, Single mode fibers, Telescopes, Mirrors, Astronomical imaging, Microlens, Signal attenuation, Fourier transforms

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The focal plane array spectrometer (FPAS) is a miniaturization concept for imaging spectrometers compared to classical dispersive and FTS instruments. FPAS is an imaging implementation of interferogram integrated FTS, targeting space-borne and commercial applications. It is based on a bi-dimensional array of waveguide spectrometers which can be assembled in small size, and form a compact package of single spectrometers. When this system is positioned in the focal plane of an objective (in a similar way as a CMOS detector array or a CCD in a camera), it will allow imaging spectrometry of the observed surface (objects). The instrument is therefore reduced to the imaging optics and the FPAS in the focal plane, which takes over the role of spectrometer and detector array. This is a breakthrough concept enabling imaging spectroscopy in a reduced volume with low power consumption. This article describes the preliminary development results of a FPAS based on arrays of single-mode waveguides. The developed linear array forms an acquisition line to image with lateral scanning. The light is injected with micro-lenses into several optical polymer waveguides. In order to circumvent the sub-sampling limitation due to nano-sampler spacing and to expand the spectral bandwidth, the basic principle of a static Lippmann spectrometer is combined with a dynamic Fourier-transform spectrometer, by adopting a piezo actuated movable mirror located at the waveguide end-facet. This waveguide spectrometer is designed for a nominal bandwidth of 25 nm at central wavelength of 762.5 nm and a spectral resolution of about 0.06 nm. The throughput and SNR in this preliminary linear array prototype are analysed and design limitations are discussed. The authors then introduce a new method for the realization of FPAS aiming at enhancing throughput and bandwidth of the integrated device. This new concept uses a bundle of single-mode waveguides, instead of only one, at the focal distance of the optical element. The novel FPAS concept is elaborated and its characteristics are described.

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Proceedings Article | 11 June 2021 Open Access

Far infrared Fourier transform spectrometer breadboard activities for the FORUM mission, ESA’s 9th Earth Explorer

C. Pachot, B. Carnicero Domínguez, B. Sierk, F. Mariani, S. Riel, H. Oetjen, G. Rodrigues, S. Ratzsch, D. Redlich, W. Posselt, E. Alberti, C. Mastrandrea, C. Monte, Y. Montembeault, D. Smith, P. Ade, X. Durandi, M. Kolm

Proceedings Volume 11852, 1185224 (2021) https://doi.org/10.1117/12.2599355

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Proceedings Article | 1 September 2015 Paper

Standing wave integrated Fourier transform spectrometer for imaging spectrometry in the near infrared

Gaël Osowiecki, Mohammad Madi, Ivan Shorubalko, Irène Philipoussis, Edoardo Alberti, Toralf Scharf, Hans Herzig

Proceedings Volume 9611, 96110P (2015) https://doi.org/10.1117/12.2188170

KEYWORDS: Waveguides, Mirrors, Spectroscopy, Glasses, Fourier transforms, Infrared spectroscopy, Gold, Microlens, Light scattering, Imaging spectrometry

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Proceedings Article | 7 March 2014 Paper

On-chip NIR optical spectrometer based on polymeric waveguide and metallic nano-structures

Maurine Malak, Konstantins Jefimovs, Irene Philipoussis, Edoardo Alberti, Toralf Scharf

Proceedings Volume 8977, 89770S (2014) https://doi.org/10.1117/12.2037218

KEYWORDS: Waveguides, Spectroscopy, Gold, Electron beam lithography, Fourier transforms, Mirrors, Polymers, Polymer multimode waveguides, Glasses, Raman spectroscopy

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Proceedings Article | 26 October 2007 Paper

MIMA, a miniaturized infrared spectrometer for Mars ground exploration: Part III. Thermomechanical design

B. Saggin, E. Alberti, L. Comolli, M. Tarabini, G. Bellucci, S. Fonti

Proceedings Volume 6744, 67441S (2007) https://doi.org/10.1117/12.737827

KEYWORDS: Mars, Temperature metrology, Sensors, Interferometers, Spectroscopy, Calibration, Infrared spectroscopy, Infrared radiation, Mirrors, Aluminum

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Proceedings Article | 26 October 2007 Paper

MIMA, a miniaturized Fourier infrared spectrometer for Mars ground exploration: Part I. Concept and expected performance

G. Bellucci, B. Saggin, S. Fonti, D. Biondi, P. Cerulli, M. De Luca, F. Altieri, A. Mattana, E. Alberti, G. Marzo, L. Zasova

Proceedings Volume 6744, 67441Q (2007) https://doi.org/10.1117/12.737896

KEYWORDS: Infrared spectroscopy, Signal to noise ratio, Spectroscopy, Mars, Sensors, Infrared radiation, Minerals, Interferometers, Carbonates, Mirrors

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Proceedings Article | 21 October 2005 Paper

Experimental characterisation and modelling of a pyroelectric sensor

Edoardo Alberti, Giovanni Moschioni, Bortolino Saggin

Proceedings Volume 5978, 59781D (2005) https://doi.org/10.1117/12.626818

KEYWORDS: Sensors, Data modeling, Modeling, Spectroscopy, Infrared sensors, Mars, Acoustics, Infrared radiation, Resistance, Thermal sensing

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Showing 5 of 7 publications

Course Instructor

NON-SPIE: Space Economy MOOC

Space infrastructure serves the Earth in diverse ways. I introduce the very basics of Earth Observation and SatCom basics aiming to show how space infrastructure is permeating our life daily.

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