Farhyphen;field analytical model for laser arrays and fitting with experimental results

摘要

Coupled laser arrays emit farhyphen;field radiation which is not well described by the gratinghyphen;like formulation. An exact diffraction theory solution for the far field of coupled laser arrays is derived. The model is used to obtain excellent fit with the farhyphen;field pattern of a twin coupled laser diode operated under pulse modulation and with that of a hybrid coupled diode laser device. The fitted results exhibit the existence of a small phase difference between the coupled stripes and this difference is increased up to 12deg; in the hybrid device.