80-GHz AlGaInAs/InP 1.55 mu m colliding-pulse mode-locked laser with low divergence angle and timing jitter

We present an 80-GHz lambda similar to 1.55 mu m passively colliding-pulse mode-locked laser based on a novel AlGaInAs/InP epitaxial structure, which consists of a strained 3-quantum-well active layer incorporated with a passive far-field reduction layer. The device generated 910 fs pulses with a state-of-art timing jitter value of 190 fs (4-80 MHz), while demonstrating a low divergence angle (12.7 degrees x26.3 degrees) with two fold butt coupling efficiency to a flat cleaved single mode fiber when compared with the conventional mode-locked laser