The Detuning Loading Effect, i.e., the effects of the modulation performance on the position of the lasing mode relative
to the Bragg reflection peak, is investigated in a Modulated Grating Y-branch laser. By proper adjustment of the lasing
mode position, simultaneous chirp reduction and modulation bandwidth enhancement can be obtained. The lasing mode
position is also crucial for side mode suppression ratio and output power.
A silicon optical bench for flip chip mounted widely tunable modulated-grating Y-branch lasers is
presented. Its impact on the static and dynamic performance of the laser device is evaluated and compared with a
conventional aluminium nitride carrier. The carriers exhibited similar thermal and static performance but the
dynamic performance was limited by the electrode layout and the higher microwave losses of the silicon optical
bench. With improved microwave design of the electrodes, flip-chip mounting on a silicon optical bench is
promising for low cost assembly of high-speed multi-electrode devices.