THERMAL-ANALYSIS OF LASER-EMISSION SURFACE-NORMAL OPTICAL-DEVICES WITH A VERTICAL-CAVITY

Laser-emission surface-normal optical devices with a vertical cavity a re expected to be key devices for optical interconnections. Thermal ch aracteristics improvement is necessary for, a large-scale-integrated t wo-dimensional array which increases the number of optical interconnec tions. To optimize the device structures to obtain good thermal charac teristics, the temperature rise of distributed Bragg reflectors and an active layer must be known. Here, we report on the first evaluation o f temperature rise in both regions, and it is found that the temperatu re rise is small for a compact double-mesa structure which allows a si ngle lateral-mode oscillation. In addition, we measured the thermal cr osstalk between the above compact devices, and it is found that the th ermal crosstalk between one-dimensional array devices is small enough when each device operates at a few milliamperes.