Mid-infrared sources, based on chalcogenide glass fibres, for biomedical diagnostics

Angela B. Seddon; Łukasz Sójka; David Furniss; Zhuoqi Tang; Richard Crane; Joel Nunes; Sendy Phang; Emma Barney; Mark Farries; Trevor M. Benson; Slawomir Sujecki

doi:10.1117/12.2593181

5 March 2021 Mid-infrared sources, based on chalcogenide glass fibres, for biomedical diagnostics

Angela B. Seddon, Łukasz Sójka, David Furniss, Zhuoqi Tang, Richard Crane, Joel Nunes, Sendy Phang, Emma Barney, Mark Farries, Trevor M. Benson, Slawomir Sujecki

Author Affiliations +

Proceedings Volume 11635, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI; 1163503 (2021) https://doi.org/10.1117/12.2593181
Event: SPIE BiOS, 2021, Online Only

Abstract

Mid-infrared (MIR) direct fiber lasers beyond 4 μm wavelength will deliver optimum beam quality of bright, spatially and temporally coherent light, routeable in MIR fiber-optics. They are being developed for applications including narrow-band biomolecular sensing, medical laser surgery at new, long wavelengths and for pulsed seeding of long wavelength MIR-supercontinua in MIR glass fiber for all-fiber, compact systems for broad-band MIR medical sensing and hyperspectral imaging. Low phonon energy, selenide chalcogenide glasses are the optimum glass host for lanthanide ion doping for emission across the 3 to 10 μm wavelength MIR region. Here, we report our recent advances including: >1 mW incoherent emission in the 4-5 μm wavelength region and demonstration of gain beyond 4 μm in Pr³⁺ doped chalcogenide glass fiber, and proposed quasi three-level lasing beyond 4 μm in Tb³⁺ doped chalcogenide glass fibers. Encouragingly, since 2020, lasing in both Pr³⁺ and Tb³⁺ selenide chalcogenide bulk glasses has been reported. Our overall goal is for new portable, MIR spectroscopic systems based on chalcogenide optical fibers for in vivo sensing, imaging and treatment in healthcare, including for early diagnosis of disease.

Citation Download Citation

Angela B. Seddon, Łukasz Sójka, David Furniss, Zhuoqi Tang, Richard Crane, Joel Nunes, Sendy Phang, Emma Barney, Mark Farries, Trevor M. Benson, and Slawomir Sujecki "Mid-infrared sources, based on chalcogenide glass fibres, for biomedical diagnostics", Proc. SPIE 11635, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI, 1163503 (5 March 2021); https://doi.org/10.1117/12.2593181

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