title: Self-mixing sensing system based on uncooled vertical-cavity surface-emitting laser array: linking multichannel operation and enhanced performance.
abstract: We compare the performance of a self-mixing (SM) sensing system based on an uncooled monolithic array of 24×1 vertical-cavity surface-emitting lasers (VCSELs) in two modes of operation: single active channel and the concurrent multichannel operation. We find that the signal-to-noise ratio of individual SM sensors in a VCSEL array is markedly improved by multichannel operation, as a consequence of the increased operational temperature of the sensors. The performance improvement can be further increased by manufacturing VCSEL arrays with smaller pitch. This has the potential to produce an imaging system with high spatial and temporal resolutions that can be operated without temperature stabilization.
authors.forename: John R
authors.initials: JR
authors.lastname: Tucker
authors.forename: Alireza
authors.initials: A
authors.lastname: Mowla
authors.forename: Jeremy
authors.initials: J
authors.lastname: Herbert
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Fuentes
authors.forename: Craig S
authors.initials: CS
authors.lastname: Freakley
authors.forename: Karl
authors.initials: K
authors.lastname: Bertling
authors.forename: Yah Leng
authors.initials: YL
authors.lastname: Lim
authors.forename: Ranveer S
authors.initials: RS
authors.lastname: Matharu
authors.forename: Julien
authors.initials: J
authors.lastname: Perchoux
authors.forename: Thomas
authors.initials: T
authors.lastname: Taimre
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Wilson
authors.forename: Aleksandar D
authors.initials: AD
authors.lastname: Rakić