4 papers · 1 filter
Broadband Thermal Noise Correlations Induced by Measurement Back-Action
Jiaxing Ma, Thomas J. Clark, Vincent Dumont +1
Modern mechanical sensors increasingly measure motion with precision sufficient to resolve the fundamental thermal noise floor over a broad band. Compared to traditional sensors --…
An optically defined phononic crystal defect
Thomas J. Clark, Simon Bernard, Jiaxing Ma +2
We demonstrate a mechanical crystal with an optically programmable defect mode. By applying an optical spring to a single unit cell of a phononic crystal membrane, we smoothly tran…
High-Power Quantum-Limited Photodiode and Classical Laser Noise Squashing
Vincent Dumont, Jiaxing Ma, Eamon Eagan +1
To benefit high-power interferometry and the creation of low-noise light sources, we develop a simple lead-compensated photodetector enabling quantum-limited readout from 0.3 mW to…
Cavity-enhanced absorption sensing with robust sideband locking
Fernanda C. Rodrigues-Machado, Pauline Pestre, Vincent Dumont +5
We present a simple, continuous, cavity-enhanced optical absorption measurement technique based on high-bandwidth Pound-Drever-Hall (PDH) sideband locking. The technique provides a…