Full-field interferometric confocal microscopy using a VCSEL array

We present an interferometric confocal microscope using an array of 1200 vertical cavity surface emitting lasers (VCSELs) coupled to a multimode fiber. Spatial coherence gating provides ~18,000 continuous virtual pinholes, allowing an entire en face plane to be imaged in a snapshot. This approach ma...

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Bibliographic Details
Published inOptics letters Vol. 39; no. 15; p. 4446
Main Authors Redding, Brandon, Bromberg, Yaron, Choma, Michael A, Cao, Hui
Format Journal Article
LanguageEnglish
Published United States 01.08.2014
Subjects
Equipment Design
Equipment Failure Analysis
Fiber Optic Technology - instrumentation
Image Enhancement - instrumentation
Interferometry - instrumentation
Microscopy, Confocal - instrumentation
Refractometry - instrumentation
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Summary:We present an interferometric confocal microscope using an array of 1200 vertical cavity surface emitting lasers (VCSELs) coupled to a multimode fiber. Spatial coherence gating provides ~18,000 continuous virtual pinholes, allowing an entire en face plane to be imaged in a snapshot. This approach maintains the same optical sectioning as a scanning confocal microscope without moving parts, while the high power of the VCSEL array (∼5  mW per laser) enables high-speed image acquisition with integration times as short as 100 μs. Interferometric detection also recovers the phase of the image, enabling quantitative phase measurements and improving the contrast when imaging phase objects.
ISSN:1539-4794
DOI:10.1364/ol.39.004446