Nd:MgO:LiNbO_3 continuous-wave laser pumped by a laser diode

Abstract

Diode-pumped laser oscillation was achieved in Nd:MgO:LiNbO(3). The absorbed pump power thresholds were as low as 1.9 mW for the high-gain or pi polarization and 8 mW for the low-gain polarization. A cw output power of 2 mW was obtained for the pi polarization at lambda = 1.085 microm for 9 mW of absorbed pump power. A slope efficiency of 37% was achieved. The diode-pumped Nd:MgO:LiNbO(3) lasers operated for extended periods of time without exhibiting any reduction in output power.

Li + diffusivity in 5 mol% MgO-doped LiNbO 3 crystal and Li-poor vapor transport equilibration effect on its surface composition

“…With known VTE duration dependence of surface Li 2 O-content, it is possible to solve the diffusion equation (3). As the Li 2 O-content alteration at the boundary C Li (z = 0, t) has a square-root dependence on the diffusion time t, like the case of the Li + diffusion system studied here, the solution to Eq.…”

“…This is because it not only has a lower coercive field [1], but also effectively suppresses the photorefractive effect [2]. The material can also find its use in rare-earth-doped bulk [3] or waveguide [4][5][6] lasers. For any practical rare-earth (Er 3+ , Nd 3+ for example)-doped LiNbO 3 waveguide device, selective rare-earth doping is a prerequisite for monolithic integration of active (optically pumped, rare-earth-doped) and passive (unpumped) devices on a same substrate, to avoid undesired re-absorption in unpumped rare-earth-doped waveguides [7].…”

Crystal growth and characterization of Nd, Mg co-doped near-stoichiometric LiNbO3

“…However, continuous wave (cw) laser oscillation of a Nd:CLN crystal pumped LD diode laser was difficult to achieve because of photorefractive damage (optical damage) [6]. Co-doping Mg into Nd:CLN crystal (Nd:Mg:CLN) enabled such laser oscillation [7]. The CLN crystal needs 5 mol% Mg to suppress photorefractive damage [8], though, while the SLN crystal grown from Lirich solution (Li-58 mol% self-flux) requires only 1 mol% Mg for the same suppression effect [9,10] stoichiometry on laser properties in Nd:Mg:LN crystals, we grow Nd:Mg:SLN crystals, and absorption and emission spectra and thermal conductivity were measured.…”

Implantation Doping and Stimulated Emission of Er3+ in LinbO3:Ti Optical Waveguides

“…The formation of optical waveguides in LiNbO 3 by Ti indiffusion, proton exchange or ion implantation is well established.. 10 devices on LiNbO 3 perform numerous linear and nonlinear functions, but do not amplify the intensity of light. Reliable optical amplifiers or lasers in LiNbO 3 have not yet been realized, although several prototypes have been evaluated (2)(3)(4). On the other hand, the stimulated emission from optically pumped rare earth [R.E.]…”