Abstract

Stable-single-longitudinal-mode lasers in the wavelength region of 1.0~1.7μm, such as distributed Bragg reflector (DBR) lasers^1),2) and distributed-feedback (DFB) lasers ³⁾, are very interesting for the low-loss optical communications⁴⁾ and the integrated optics in that wavelength region. In order to realize an effective DBR laser, it is essential to introduce a low-loss waveguide on which distributed Bragg reflectors are fabricated with first-order gratings. An integrated twin-guide structure⁵⁾ is one candidate for this purpose⁶⁾, since gratings can be fabricated on its low-loss output guide.

© 1980 Optical Society of America