Polarisation insensitivephotodetector characteristicsof a tensile strained barrier laser diode

Abstract
A novel approach for realising polarisation insensitive photodetectors in a laser diode is proposed and demonstrated using a tensile strained barrier multiquantum well active layer. The polarisation dependency of the sensitivity is suppressed by 0.5 dB. A flat response is obtained in the 1.5 µm wavelength region from 1.48 to 1.58 µm.