Proposed cross grating single mode DFB laser

A two-dimensional single-mode ditsributed feedback (DFB) laser is presented. The laser uses a perpendicular grating to broaden the width of narrow stripe lasersfor longitudinal and lateral mode applications. This grating is based on the threshold current gain and the couping constants for transverse electric and transverse magnetic modes. Analysis of this DFB laser indicates that the use ofcross grating could result in a single frequency operation of the device.