Harmonically mode-locked Ti:Er:LiNbO3 waveguide laser

Active mode locking of an Er-diffusion-doped Ti:LiNbO3 waveguide laser by intracavity phase modulation to as high as the fourth harmonic (5.12 GHz) of the axial-mode frequency spacing is reported. The diode-pumped, pigtailed, and fully packaged laser with a monolithically integrated intracavity phase modulator has a threshold of 9 mW (incident pump power Ep jj c) and emits transform-limited pulses of >3.8-ps width and <5.6-pJ pulse energy (gain-switched mode locking) at 1602-nm wavelength (Es jj c). The relative change of the mode-locking frequency with the temperature is 3.65 3 1025y±C. The mode-locking acceptance bandwidth is 675 kHz near the axial-mode frequency spacing at approximately five times the threshold pump power

Monolithically integrated DBR waveguidelaser and intensity modulator in erbiumdoped LiNbO3

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