Twohyphen;dimensional distributedhyphen;feedback lasers and their applications

摘要

We report the operation of twohyphen;dimensional distributedhyphen;feedback (DFB) lasers in which periodic thickness variations exist in two orthogonal directions in the plane of the film. By using photoresist and chemical etching, twohyphen;dimensional gratings with periods of 0.635 and 4.34 mgr;m are formed on fused silica substrates. For the gain medium, a polyurethane film doped with rhodamine 6G is used. Emission characteristics and potential applications of twohyphen;dimensional DFB lasers are discussed.