We describe the design and performance of ridge waveguide1,2 distributed feedback lasers operating in the 1.51-1.58-μm spectral region. A schematic diagram of a ridge DFB laser is shown in Fig. 1. The base structure and epitaxial regrowth over the grating were obtained by liquid phase epitaxy. Second-order diffraction gratings were defined by electron-beam writing in the top cladding layer and transferred by ion-beam milling. This procedure yields deep gratings, shown in Fig. 2, with the groove-to-period ratio as small as 10% and very efficient coupling to the radiation field.

© 1985 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription