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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Whispering gallery mode sensing with a dual frequency comb probe.
Vincent Michaud-Belleau1, Julien Roy, Simon Potvin
1Centre d’optique, photonique et laser (COPL), Université Laval, 2375 rue de la Terrasse, Québec, G1V0A6, Canada.
Optics Express
|February 15, 2012
Summary
Dual comb interferometry precisely measures silica microsphere responses for sensitive detection. This technique enables label-free biosensing by analyzing microresonator impulse responses.
Area of Science:
- Optics and Photonics
- Materials Science
- Chemical Sensing
Background:
- Microresonators offer high sensitivity for various applications.
- Accurate characterization of microresonator impulse responses is crucial for sensing.
- Dual comb interferometry provides high temporal resolution for optical measurements.
Purpose of the Study:
- To investigate the use of dual comb interferometry for probing silica microspheres.
- To demonstrate the sensing capabilities of microresonator impulse responses.
- To achieve high temporal resolution in measuring microresonator dynamics.
Main Methods:
- Utilized a dual comb interferometry setup to measure impulse responses of silica microspheres.
- Achieved a temporal resolution below 400 femtoseconds over a 200 picosecond range.
- Calculated transmission spectra from measured impulse responses.
Main Results:
- Successfully measured impulse responses of silica microspheres with high temporal resolution.
- Demonstrated sensing by detecting changes in isopropanol concentration.
- Showcased label-free biosensing by detecting bovine serum albumin binding.
Conclusions:
- Dual comb interferometry is a powerful tool for characterizing microresonator dynamics.
- The impulse response amplitudes and phases provide valuable sensing information.
- This method enables sensitive and label-free detection of chemical and biological species.
