Channel waveguide lasers in a lead silicate glass fashioned using the extrusion technique

Mairaj, Arshad K.; Feng, Xian; Shepherd, David P.; Hewak, Daniel W.
October 2004
Applied Physics Letters;10/4/2004, Vol. 85 Issue 14, p2727
Academic Journal
We report the use of extrusion for the development of planar buried channel waveguide lasers in a neodymium-doped lead-silicate glass host. The extrusion process was performed at a constant die temperature of 555±10°C, an applied pressure of 1850 N cm-2 and a viscosity of 107.8–107.2 P, respectively. A planar substrate, 10 mm in length cut from the extruded product, had four buried waveguides each with a core size of 8 by 2.5 μm in the horizontal and vertical directions. Optical characterization of this waveguide revealed single-mode laser operation at 1058 nm with a slope efficiency of 40% for an absorbed power of 59.3 mW. The measured device propagation loss was ∼0.3 dB cm-1.


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