Narrow Linewidth Laser Diode Technology for Biophotonics

Oct 26, 2023
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About This Webinar
Narrow linewidth lasers are a key component of numerous biophotonic diagnostic measurements, including Raman spectroscopy, flow cytometry, and blood flow. The miniaturization of these light sources has enabled the wide adoption of these techniques in both research laboratories and field settings for numerous applications including biomedical sensors and imaging, medical diagnostics, speckle imaging, pharmaceutical and process control, and food safety or contamination.

This presentation focuses on the narrow linewidth laser technology platform utilizing volume Bragg gratings (VBG) for visible through IR wavelengths that enable these applications for both high spatial resolution imaging, such as single-spatial mode lasers, as well as large area detection, such as multi-spatial mode lasers. This VBG platform can be applied across different semiconductor laser material systems which allows for large wavelength agility utilizing commercially available semiconductor lasers.

The key aspects of this technology platform are shared along with case studies of various applications in the bio-photonics field, including cancer cell detection, perfusion imaging, and identification of food-borne pathogens.

*** This presentation premiered during the 2023 BioPhotonics Conference. For more information on Photonics Media conferences and summits, visit

About the presenter

Greg CharacheGreg W. Charache, Ph.D., is currently the vice president of photonics at Metrohm Spectro Inc. (dba Innovative Photonic Solutions Inc.) in Plainsboro, New Jersey where he leads the development of next generation OEM, handheld, and laboratory spectroscopy components and systems. After receiving a Bachelor of Science degree from University of Delaware, Charache did graduate work at Rensselaer Polytechnic Institute (RPI) receiving a Master of Science degree and doctorate in electrical engineering in 1991 and 1994, respectively. He then joined Lockheed Martin’s Knolls Atomic Laboratory, Schenectady as a senior researcher from 1994-2000 working on InP- and GaSb-based thermo-photovoltaic devices and systems.

In 2000, he joined Princeton Lightwave Inc. as a senior researcher and reliability manager for high-power single-mode ridge waveguide InP-based semiconductor laser diodes used in the telecom industry. In 2002, the company was acquired by the TRUMPF Group for the development and manufacturing of high-power GaAs-based laser diodes for industrial applications. At TRUMPF Photonics Inc. from 2002 to 2018, he worked in various roles in both development and production including some of the first work on wavelength stabilization of laser diodes with volume Bragg gratings. Charache has published over 75 papers and has 10 patents.
ImagingLasersspectroscopyBiophotonicsnarrow linewidth laserVolume Bragg Grating (VBG)
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