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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20261027T202658Z
LAST-MODIFIED:20161110T214542Z
DTSTART:20161111T170000Z
DTEND:20161111T180000Z
UID:event1647@bu.edu
URL:http://physics.bu.edu/internal/events/show/1647
SUMMARY:Ultrafast infrared fiber lasers and applications in mid-infrared vi
	brational photothermal imaging
DESCRIPTION:Featuring Michelle Sanders\, BU\nHosted by: Alexander Sushkov\n
	\nPart of the Biophysics/Condensed Matter Seminar Series.\n\nThulium(Tm)/Ho
	lmium(Ho) co-doped fibers have recently moved into the focus of research du
	e to a broadband gain emission window around 2µm and attractive applicatio
	ns in spectroscopy\, LIDAR\, biomedical treatment and diagnosis. In this ta
	lk\, we will outline pathways to achieve low noise\, high repetition rate u
	ltrafast lasers in a versatile linear Tm/Ho fiber laser cavity. \nIn the se
	cond part of the talk we will focus on a mid-infrared photothermal spectros
	copy system that combines a mid-infrared quantum cascade laser with one of 
	our custom-designed fiber laser. Mid-infrared spectral imaging in the finge
	rprint region (at wavelengths ~5μm and longer) can reveal characteristic d
	etails about molecular compounds and secondary structure of chemicals and b
	iomolecules. A contact-less\, non-destructive mid-infrared imaging system w
	ith high sensitivity and specificity based on vibrational photothermal spec
	troscopy will be presented. Scaling of the pump power a nonlinear photother
	mal spectroscopy regime promises a novel multi-dimensional characterization
	 method for materials with enhanced sensitivity with improved spatial resol
	ution. Applications of the presented system can range from chemical trace h
	azardous material detection\, to identification of neurodegenerative diseas
	es based on secondary protein configurations\, remote sensing and process c
	ontrol.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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