Four-Channel Differential Lock-in Amplifiers With Autobalancing Network for Stimulated Raman Spectroscopy

Giuseppe Sciortino; Andrea Ragni; Alejandro De Cadena la; Marco Sampietro; Giulio Cerullo; Dario Polli; Giorgio Ferrari

doi:10.1109/jssc.2020.3046484

Four-Channel Differential Lock-in Amplifiers With Autobalancing Network for Stimulated Raman Spectroscopy

Giuseppe Sciortino, Andrea Ragni, Alejandro De Cadena la, Marco Sampietro, Giulio Cerullo, Dario Polli, Giorgio Ferrari

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

We introduce a multi-channel integrated circuit for fast stimulated Raman scattering (SRS) microscopy on multiple simultaneous frequencies at a frame rate higher than 1 frame/s. The chip is a four-channel differential readout system, based on the lock-in technique. It is able to measure down to 10 ppm SRS signal, over a wide range of input optical powers (50-600 μW per channel), with a pixel dwell time of only 30 μs. Each acquisition channel includes two low-noise preamplifiers, two variable-gain amplifiers, a fully differential voltage subtractor, and a lock-in demodulator. The differential readout electronics rejects the power fluctuations of the laser, and it is automatically balanced by an analog feedback loop over ±30% input power mismatches. Due to the autobalancing network, the pixel dwell time is reduced by a factor up to 225 with a settling time of only 10 μs. The chip is fabricated in AMS 0.35 μm CMOS technology, and it is included in a combined electronics and optical system. Both single-pixel spectral measurements and multi-spectral imaging measurements are presented to validate the full SRS microscope.

Original language	English (US)
Pages (from-to)	1-1
Number of pages	1
Journal	IEEE Journal of Solid-State Circuits
DOIs	https://doi.org/10.1109/jssc.2020.3046484
State	Published - 2021
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2021-02-16
Acknowledged KAUST grant number(s): OSR2016-CRG5-3017-01
Acknowledgements: This work was supported in part by the European Research Council Consolidator Grant VIBRA (ERC-2014-CoG No. 648615) headed by D. P.;
in part by the EU Project NEBULA under Grant 871658; in part by the EU project TRAINING4CRM H2020 under Grant 722779; in part by the
H2020 project GRAPHENE Flagship (n◦ 785219); in part by the King Abdullah University of Science and Technology (KAUST, project n◦ OSR2016-CRG5-3017-01); and in part by the Italian Ministry of University and Research, Framework per l’Attrazione e il Rafforzamento delle Eccellenze in Italia (FARE) and “Coherent H2 Raman Metrology” project (CH2ROME, no. R164WYYR8N).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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10.1109/jssc.2020.3046484

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@article{348f951fdc3c4d7aba6b8cce7cbdf135,

title = "Four-Channel Differential Lock-in Amplifiers With Autobalancing Network for Stimulated Raman Spectroscopy",

abstract = "We introduce a multi-channel integrated circuit for fast stimulated Raman scattering (SRS) microscopy on multiple simultaneous frequencies at a frame rate higher than 1 frame/s. The chip is a four-channel differential readout system, based on the lock-in technique. It is able to measure down to 10 ppm SRS signal, over a wide range of input optical powers (50-600 μW per channel), with a pixel dwell time of only 30 μs. Each acquisition channel includes two low-noise preamplifiers, two variable-gain amplifiers, a fully differential voltage subtractor, and a lock-in demodulator. The differential readout electronics rejects the power fluctuations of the laser, and it is automatically balanced by an analog feedback loop over ±30% input power mismatches. Due to the autobalancing network, the pixel dwell time is reduced by a factor up to 225 with a settling time of only 10 μs. The chip is fabricated in AMS 0.35 μm CMOS technology, and it is included in a combined electronics and optical system. Both single-pixel spectral measurements and multi-spectral imaging measurements are presented to validate the full SRS microscope.",

author = "Giuseppe Sciortino and Andrea Ragni and {De Cadena la}, Alejandro and Marco Sampietro and Giulio Cerullo and Dario Polli and Giorgio Ferrari",

note = "KAUST Repository Item: Exported on 2021-02-16 Acknowledged KAUST grant number(s): OSR2016-CRG5-3017-01 Acknowledgements: This work was supported in part by the European Research Council Consolidator Grant VIBRA (ERC-2014-CoG No. 648615) headed by D. P.; in part by the EU Project NEBULA under Grant 871658; in part by the EU project TRAINING4CRM H2020 under Grant 722779; in part by the H2020 project GRAPHENE Flagship (n◦ 785219); in part by the King Abdullah University of Science and Technology (KAUST, project n◦ OSR2016-CRG5-3017-01); and in part by the Italian Ministry of University and Research, Framework per l{\textquoteright}Attrazione e il Rafforzamento delle Eccellenze in Italia (FARE) and “Coherent H2 Raman Metrology” project (CH2ROME, no. R164WYYR8N). This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2021",

doi = "10.1109/jssc.2020.3046484",

language = "English (US)",

pages = "1--1",

journal = "IEEE Journal of Solid-State Circuits",

issn = "0018-9200",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Four-Channel Differential Lock-in Amplifiers With Autobalancing Network for Stimulated Raman Spectroscopy

AU - Sciortino, Giuseppe

AU - Ragni, Andrea

AU - De Cadena la, Alejandro

AU - Sampietro, Marco

AU - Cerullo, Giulio

AU - Polli, Dario

AU - Ferrari, Giorgio

N1 - KAUST Repository Item: Exported on 2021-02-16 Acknowledged KAUST grant number(s): OSR2016-CRG5-3017-01 Acknowledgements: This work was supported in part by the European Research Council Consolidator Grant VIBRA (ERC-2014-CoG No. 648615) headed by D. P.; in part by the EU Project NEBULA under Grant 871658; in part by the EU project TRAINING4CRM H2020 under Grant 722779; in part by the H2020 project GRAPHENE Flagship (n◦ 785219); in part by the King Abdullah University of Science and Technology (KAUST, project n◦ OSR2016-CRG5-3017-01); and in part by the Italian Ministry of University and Research, Framework per l’Attrazione e il Rafforzamento delle Eccellenze in Italia (FARE) and “Coherent H2 Raman Metrology” project (CH2ROME, no. R164WYYR8N). This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2021

Y1 - 2021

N2 - We introduce a multi-channel integrated circuit for fast stimulated Raman scattering (SRS) microscopy on multiple simultaneous frequencies at a frame rate higher than 1 frame/s. The chip is a four-channel differential readout system, based on the lock-in technique. It is able to measure down to 10 ppm SRS signal, over a wide range of input optical powers (50-600 μW per channel), with a pixel dwell time of only 30 μs. Each acquisition channel includes two low-noise preamplifiers, two variable-gain amplifiers, a fully differential voltage subtractor, and a lock-in demodulator. The differential readout electronics rejects the power fluctuations of the laser, and it is automatically balanced by an analog feedback loop over ±30% input power mismatches. Due to the autobalancing network, the pixel dwell time is reduced by a factor up to 225 with a settling time of only 10 μs. The chip is fabricated in AMS 0.35 μm CMOS technology, and it is included in a combined electronics and optical system. Both single-pixel spectral measurements and multi-spectral imaging measurements are presented to validate the full SRS microscope.

AB - We introduce a multi-channel integrated circuit for fast stimulated Raman scattering (SRS) microscopy on multiple simultaneous frequencies at a frame rate higher than 1 frame/s. The chip is a four-channel differential readout system, based on the lock-in technique. It is able to measure down to 10 ppm SRS signal, over a wide range of input optical powers (50-600 μW per channel), with a pixel dwell time of only 30 μs. Each acquisition channel includes two low-noise preamplifiers, two variable-gain amplifiers, a fully differential voltage subtractor, and a lock-in demodulator. The differential readout electronics rejects the power fluctuations of the laser, and it is automatically balanced by an analog feedback loop over ±30% input power mismatches. Due to the autobalancing network, the pixel dwell time is reduced by a factor up to 225 with a settling time of only 10 μs. The chip is fabricated in AMS 0.35 μm CMOS technology, and it is included in a combined electronics and optical system. Both single-pixel spectral measurements and multi-spectral imaging measurements are presented to validate the full SRS microscope.

UR - http://hdl.handle.net/10754/667439

UR - https://ieeexplore.ieee.org/document/9319874/

UR - http://www.scopus.com/inward/record.url?scp=85099549360&partnerID=8YFLogxK

U2 - 10.1109/jssc.2020.3046484

DO - 10.1109/jssc.2020.3046484

M3 - Article

SN - 0018-9200

SP - 1

EP - 1

JO - IEEE Journal of Solid-State Circuits

JF - IEEE Journal of Solid-State Circuits

ER -

Four-Channel Differential Lock-in Amplifiers With Autobalancing Network for Stimulated Raman Spectroscopy

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