Miniature swept source for point of care optical frequency domain imaging.
Point of care (POC) medical technologies require portable, small, robust instrumentation for practical implementation. In their current embodiment, optical frequency domain imaging (OFDI) systems employ large form-factor wavelength-swept lasers, making them impractical in the POC environment. Here, we describe a first step toward a POC OFDI system by demonstrating a miniaturized swept-wavelength source. The laser is based on a tunable optical filter using a reflection grating and a miniature resonant scanning mirror. The laser achieves 75 nm of bandwidth centered at 1340 nm, a 0.24 nm instantaneous line width, a 15.3 kHz repetition rate with 12 mW peak output power, and a 30.4 kHz A-line rate when utilizing forward and backward sweeps. The entire laser system is approximately the size of a deck of cards and can operate on battery power for at least one hour.
Goldberg
Brian D
BD
Harvard Medical School and the Wellman Center for Photomedicine, Massachusetts General Hospital, 50 BlossomSt., Boston, MA 02114, USA.
Motaghian Nezam
S M R
SM
Jillella
Priyanka
P
Bouma
Brett E
BE
Tearney
Guillermo J
GJ
D044963:Biopsy, Fine-Needle / Q000295:instrumentation; D004867:Equipment Design; D005336:Fiber Optic Technology; D006801:Humans; D007834:Lasers; D008904:Miniaturization; D055096:Optical Devices; D055100:Optical Fibers; D019095:Point-of-Care Systems