Cavity-based mid-IR fiber gas laser pumped by a diode laser

Muhammad Rosdi Abu Hassan, Fei Yu, William J. Wadsworth, Jonathan C. Knight

Research output: Contribution to journalLetterpeer-review

126 Citations (SciVal)
18 Downloads (Pure)


Mid-infrared (IR) lasers are currently an area of rapid development, with several competing technologies. In traditional gas lasers, the effective interaction length is limited and the system as a whole is bulky and inflexible, limiting their applications. Standard gain fibers cannot be used in the mid-IR because the glass forming the fiber core is not transparent at these longer wavelengths. In this Letter, we report the demonstration of a mid-IR fiber gas laser using feedback in an optical cavity. The laser uses acetylene gas in a high-performance silica hollow-core fiber as the gain medium, and lases either continuous wave or synchronously pumped when pumped by telecom-wavelength diode lasers. We have demonstrated lasing on a number of transitions in the spectral band of 3.1–3.2 μm. The system could be extended to other selected molecular species to generate output in the spectral band up to 5 μm, and it has excellent potential for power scaling.
Original languageEnglish
Pages (from-to)218-221
Number of pages4
Issue number3
Early online date24 Feb 2016
Publication statusPublished - 20 Mar 2016


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