Toward all-fiber supercontinuum spanning the mid-infrared

Darren D. Hudson*, Sergei Antipov, Lizhu Li, Imtiaz Alamgir, Tomonori Hu, Mohammed El Amraoui, Younes Messaddeq, Martin Rochette, Stuart D. Jackson, Alexander Fuerbach

*Corresponding author for this work

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

Broadband laser light sources in the mid-infrared region attract enormous interest due to the plethora of applications they are enabling, including multispecies trace gas detection, free-space communications, and infrared countermeasures. Key to the progress in supercontinuum generation has been the wide availability of fiber-based near-infrared and bulk-optic mid-infrared pump sources and suitably engineered nonlinear media capable of supporting high-brightness supercontinua. A large proportion of the system complexity relates to the pump source itself with free-space systems based on parametric conversion being the most common for the generation of long-wavelength supercontinua. In an effort to realize all fiber and all mid-infrared supercontinuum sources, we combine a recently developed 2.9 μm ultrafast fiber laser based on holmium with an environmentally stable, polymer-protected all-chalcogenide tapered fiber. By launching 230 fs, 4.2 kW peak power pulses into the As2Se3∕As2S3 tapered fiber, we demonstrate a spectrum spanning from 1.8 to 9.5 μmat the −20 dB points with an average power of more than 30 mW. This >2 octave-spanning supercontinuum is a crucial step toward robust mid-infrared broadband sources required for future field-deployable instruments.

Original languageEnglish
Article number298029
Pages (from-to)1163-1166
Number of pages4
JournalOptica
Volume4
Issue number10
DOIs
Publication statusPublished - 20 Oct 2017

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Hudson, D. D., Antipov, S., Li, L., Alamgir, I., Hu, T., El Amraoui, M., ... Fuerbach, A. (2017). Toward all-fiber supercontinuum spanning the mid-infrared. Optica, 4(10), 1163-1166. [298029]. https://doi.org/10.1364/OPTICA.4.001163