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Related Experiment Video

Updated: May 18, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Continuous real-time correction and averaging for frequency comb interferometry.

Julien Roy¹, Jean-Daniel Deschênes, Simon Potvin

¹Centre d’Optique, Photonique et Laser, 2375 rue de la Terrasse, Université Laval, Québec, Québec G1V 0A6, Canada. jgenest@gel.ulaval.ca

|October 6, 2012

Summary

This summary is machine-generated.

This study presents a real-time interferogram correction and averaging algorithm for dual-comb spectroscopy, implemented on a field-programmable gate array (FPGA). The novel approach achieves unprecedented signal-to-noise ratios, advancing optical referencing accuracy.

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Area of Science:

Spectroscopy
Optical Engineering
Signal Processing

Background:

Dual-comb spectroscopy (DCS) offers high-resolution molecular fingerprinting.
Real-time processing of interferograms is crucial for dynamic measurements.
Field-programmable gate arrays (FPGAs) enable high-speed, custom hardware acceleration.

Purpose of the Study:

To develop and demonstrate a real-time algorithm for continuous correction and averaging of interferograms from a dual-comb spectrometer.
To implement this algorithm on an FPGA for efficient, high-performance data processing.
To validate the accuracy and performance of the system through extensive measurements.

Main Methods:

Real-time interferogram correction and averaging algorithm.
Implementation on a field-programmable gate array (FPGA) development board.
Optical referencing and signal-to-noise ratio (SNR) measurements over extended periods.

Main Results:

Achieved a signal-to-noise ratio (SNR) of 10,750,000 (>21 bits) in the interferogram and 316,000 in the spectrum at 100 MHz resolution.
Demonstrated high accuracy in optical referencing and processing algorithm performance with 24 hours of averaging.
Reported the first interferogram where signal dominates noise across the full delay range.

Conclusions:

The developed FPGA-based real-time processing algorithm significantly enhances dual-comb spectroscopy performance.
The system achieves exceptional SNR and accuracy, enabling new possibilities in high-resolution spectral analysis.
This work sets a new benchmark for real-time data processing in interferometric measurements.