Experimental observation of gain in a resonantly pumped Pr3+ -doped chalcogenide glass mid-infrared fibre amplifier notwithstanding the signal excited-state absorption

Scientific Reports
Meili ShenA B Seddon

Abstract

We demonstrate a maximum gain of 4.6 dB at a signal wavelength of 5.28 μm in a 4.1 μm resonantly pumped Pr3+-doped selenide-based chalcogenide glass fibre amplifier of length 109 mm, as well as a new signal excited-stated absorption (ESA) at signal wavelengths around 5.5 μm. This work to the best of our knowledge is the first experimental demonstration of gain at mid-infrared (MIR) wavelengths in a Pr3+-doped chalcogenide fibre amplifier. The signal ESA of the fibre is attributed to the transition 3H6 → (3F4, 3F3) after the pump ESA (3H5 → 3H6) at a pump wavelength of 4.1 μm, which absorbs the MIR signal at wavelengths of 5.37, 5.51 and 5.57 μm, and so spoils the amplifier's performance at these wavelengths. Thus, this signal ESA should be suppressed in a resonantly pumped Pr3+-doped selenide-based chalcogenide fibre amplifier.

References

Dec 18, 2010·Optics Express·Angela B SeddonTrevor M Benson
Jun 16, 2015·Optics Letters·Vincent FortinRéal Vallée
May 14, 2016·Optics Letters·Matthew R Majewski, Stuart D Jackson
May 19, 2016·Optics Letters·Ori Henderson-SapirDavid J Ottaway
Mar 31, 2018·Optics Letters·R I WoodwardS D Jackson
Nov 25, 2018·Optics Express·Florent StareckiVirginie Nazabal

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Citations

Jul 19, 2020·Optics Express·Hoa Phuoc Trung NguyenYasutake Ohishi

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