Pulse dynamics in ultrafast thulium fiber lasers with vector solitons and application in label-free mid-infrared photothermal imaging
Date:
27 Jul, 2018 (Fri)
Time:
4:00 pm
Location:
Room 601J

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Speaker

Dr. Michelle Sander
Assistant Professor
Department of Electrical and Computer Engineering
Boston University

Abstract

Thulium fiber lasers operating in the eye-safe wavelength region from 1.7 µm to 2.2 µm are attractive for applications in gas/environmental sensing, biomedical diagnosis and surgery and nonlinear conversion. Dual-output ultrafast lasers pave a promising pathway towards compact single sources for high precision metrology and dual comb spectroscopy. Based on vector soliton dynamics, a compact fiber laser with co-generated, orthogonally polarized interlaced pulses and coherent energy exchange will be discussed. Further, self-organized multiple pulsing operation and the generation of extreme events and chaotic transient states is demonstrated in turn-key, compact thulium fiber lasers.

The second part of this talk will focus on mid-infrared vibrational photothermal spectroscopy in the fingerprint region (at wavelengths of ~5μm and longer), which can reveal characteristic details about molecular compounds with high sensitivity and specificity. This technique can offer sub-diffraction limited imaging resolution and can be applied to analyze phase transitions or secondary protein conformations in biomedical tissue.

 

Biography of the speaker:

Dr. Michelle Sander is an assistant professor in the Department of Electrical and Computer Engineering at Boston University and an affiliated faculty with the Materials Science and Engineering Division. She is a member of the BU Photonics Center, the BU-BUMC Cancer Center, the Center for Neurophotonics and the BU Nanotechnology Center. She received her PhD in Electrical Engineering from the Massachusetts Institute of Technology in the Optics and Quantum Electronics Group. Previously, she graduated with a German Diploma degree in Electrical Engineering and a Master of Science degree from the Georgia Institute of Technology. Her research interest include the development of innovative novel ultrafast fiber lasers, characterization of femtosecond dynamics and applications to vibrational spectroscopy and infrared nerve stimulation. Dr. Sander received an AFOSR Young Investigator Award, is the recipient of two BU Dean’s Catalyst Awards and the BU Nanotechnology Innovation Center Award.


Organizer

Prof. K.K.Y. Wong

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