Er/sup 3+/-Yb/sup 3+/ codoped phosphate glass waveguide amplifier using Ag/sup +/-Li/sup +/ ion exchange

Abstract

An Er/sup 3+/-Yb/sup 3+/ codoped phosphate glass waveguide amplifier using an Ag/sup +/-Li/sup +/ ion exchange process is demonstrated. The glass contains Li/sup +/ instead of Na/sup +/ and the spectroscopic properties were characterized. The emission parameters were calculated, and the radiative quantum efficiency of the <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sup> I/sub 13/2/ to <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sup> I/sub 15/2/ transition is estimated to be /spl sim/100 %. The planar glass waveguide amplifier produces a net gain /spl sim/3.3 dB/cm with an input signal wavelength of 1.535 μm at a power of -40 dBm, for 120 mW of 980-nm pump power.