title: Self-mixing flow sensor using a monolithic VCSEL array with parallel readout.
abstract: The self-mixing sensing technique is a compact, interferometric sensing technique that can be used for measuring fluid flows. In this work, we demonstrate a parallel readout self-mixing flow velocity sensing system based on a monolithic Vertical-Cavity Surface-Emitting Laser (VCSEL) array. The parallel sensing scheme enables high-resolution full-field imaging systems employing electronic scanning with faster acquisition rates than mechanical scanning systems. The self-mixing signal is acquired from the variation in VCSEL junction voltage, thus markedly reducing the system complexity. The system was validated by measuring velocity distribution of fluid in a custom built diverging-converging planar flow channel. The results obtained agree well with simulation and demonstrate the feasibility of high frame-rate and resolution parallel self-mixing sensors.
authors.affiliation: School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia. ylim@itee.uq.edu.au
authors.forename: Yah Leng
authors.initials: YL
authors.lastname: Lim
authors.forename: Russell
authors.initials: R
authors.lastname: Kliese
authors.forename: Karl
authors.initials: K
authors.lastname: Bertling
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Tanimizu
authors.forename: P A
authors.initials: PA
authors.lastname: Jacobs
authors.forename: Aleksandar D
authors.initials: AD
authors.lastname: Rakić
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D017022:Flow Injection Analysis / Q000295:instrumentation*; D007834:Lasers; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation*; D012212:Rheology / Q000295:instrumentation*