Monolithically integrated DBR waveguide laser andintensity modulator inerbium doped LiNbO ₃

Abstract

For the first time, a DBR laser has been integrated with a Mach Zehnder intensity modulator in Er diffusion doped, Z cut LiNbO3, with Ti indiffused waveguides and dry etched Bragg gratings. The monolithically integrated device has a threshold of 54.8 mW incident pump power (λp = 1480 nm) and emits, in a single longitudinal mode, up to 0.65 mW CW output power at λs = 1561 nm. The Mach-Zehnder type intensity modulator has an optical bandwidth > 3 GHz.