Efficient lasing at near 3µm by a Dy-doped ZBLAN fiber laser pumped at ∼1.1 µm by an Yb fiber laser

Abstract

Operation of a single-clad Dy3+ -doped ZrF 4 -BaF 2 -LaF 3-AlF3-NaF (ZBLAN) fiber laser operating at mid-infrared near 3 μm is presented. The laser is pumped by an Yb 3+ -doped silica fiber laser centered at 1088 nm. An output of near 0.1 W with a slope efficiency of up to 23% with respect to absorbed pump power was measured. The laser performance, theoretical modeling and laser spectrum of Dy fiber laser system with respect to various cavity losses are studied. The experimental slope efficiency is more than 4.5 times higher than the previous demonstration, and is 64% of the Stokes efficiency limit. The efficiency was improved by using cavity mirrors of reflectivities of 99 and 50%. The emission central wavelength and spectral width are found to be dependent on the pump power and output coupler, reflectivity. The experimental data and theoretical modeling of the Dy 3+ -ZBLAN fiber lasers with respect to absorbed pump

Experimental Investigation of Mid-Infrared Laser Action From Dy3+ Doped Fluorozirconate Fiber

“…In that contribution, the fiber laser was emitting 275 mW maximum output power, with a slope efficiency of 4.5%, under 1.094 µm pumping. The second successful demonstration of a Dy 3+ : ZBLAN fiber laser, pumped at 1.088 µm, was presented in [11]. In this work, a laser slope efficiency of 23% was achieved.…”

Mid‐IR to Visible Photoluminescence, Dielectric, and Ferroelectric Properties of Er‐Doped KNLN Ceramics

“…6,7 The efficiency of up-conversion also depends on the dopant concentration, energy migration between activators, distribution, and site symmetry of activators in the host as well as the host geometry. 11 Accordingly, Er-doped glasses, such as tungstate, tellurite, germanate, and borosilicate glasses, 12,13 have been widely studied for MIR emission. Among the various strong absorption bands of Er 3+ , the absorption peak ( 4 I 15/2 ?…”

Efficient 2.7 micron emission from Er3+/Pr3+ codoped oxyfluorotellurite glass

“…Due to the favourable thermal properties, high efficiency and potential applications in medical surgery, military countermeasures, atmosphere pollution monitoring, remote sensing and eye-safe laser radar [1][2][3][4][5], considerable attentions have recently been attracted to fiber lasers operating at~3 μm obtained from various rare earth lasing ions e.g. Dy 3+ [2,3], Ho 3+ [4], and Er 3+ [5,6].…”

“…Dy 3+ [2,3], Ho 3+ [4], and Er 3+ [5,6]. Er 3+ ion is a particularly popular dopant for~3 μm generation because of the fact that its absorption peak 4 I 15/2 ➔ 4 I 11/2 matches well with the emission waveband of the readily available low cost high power diode laser operating at near 980 nm.…”