1.55 /spl mu/m DFB laser integrated on erbium doped phosphate glass substrate

Summary form only given. Recently, a new efficient waveguide amplifier on phosphate glass has been demonstrated. In this paper, we present the first steps of fabrication and analysis of 10 monolithically integrated DFB lasers on a chip. The starting point of our work is a Er/Yb co-doped phosphate, on which buried channel waveguides have been realized using ion exchanged techniques. The glass is etched sufficiently to get more than 60% of reflectivity at Bragg wavelength. Under pumping at 980 nm, single longitudinal mode operation around 1.55 /spl mu/m is demonstrated for all the ten waveguides of the chip.