Chalcogenide glass Raman fiber laser

Abstract

We report the operation of a chalcogenide glass Raman fiber laser. To mitigate photoinduced effects and minimize impurity absorption, a 2051nm Tm3+-doped silica fiber laser was employed as the pump source. Vibrations between the polymerlike layers comprising the glass produced first Stokes emission at 2062nm, an output power of 0.64W, and a slope efficiency of ∼66%. Bond bending and bond stretching vibrations within the layers simultaneously produced first Stokes output at 2102nm (0.2W) and 2166nm (16mW), respectively. Second Stokes output at 2074nm was produced when the fiber length was extended.

Nonlinear optics in glasses: How can we analyze?

“…Stimulated Raman-scattering [38] appears to be promising for wide-band optical amplifications [39][40][41]. Since Raman scattering is also a two-photon process as the two-photon absorption, the transition probability can be calculated following the conventional perturbation theory.…”

“…That is, the chalcogenide exhibits greater Raman gain by 2-3 orders of magnitude than that of silica glasses [39][40][41]. This gain ratio can be interpreted as a power of bandgap ratio, (9eV/1.8eV) 3 ≈ 10 2 , using the optical gaps of SiO 2 and As 2 Se 3 [15] and temporally γ = 3.…”

Short range order in Ge–As–Se glasses

“…Chalcogenide glasses have nonlinearity several orders of magnitude greater than silica glass, which makes them useful for all-optical processing of telecommunication signals at extreme speeds [3,4]. Chalcogenide glass optical fibers are employed in numerous devices, for example in IR optical fiber lasers and amplifiers [5,6], Raman lasers [7,8] or fiber-based chemical and biomedical sensor devices [9][10][11][12]. Several other applications were considered, such as medical endoscopy [13], environmental metrology [14] or spatial interferometry.…”

Energy level decay and excited state absorption processes in erbium-doped tellurite glass

“…2) and low phonon energy glasses e.g., the chalcogenides. 3,4 Stability issues are a hindrance for these materials and for the generation of high power, a long gain medium length and large mode area can be achieved through the use of a fiber geometry.…”