OPTICAL SEMICONDUCTOR DEVICE

An optical semiconductor apparatus 10 includes: an optical semiconductor device 12 including a translucent support substrate 20; a buffer layer 22 on the support substrate 20, a seal ring (e.g., a first electrode 32) in a frame shape provided in an outer region 60 on the buffer layer 22, an active layer 26 provided on an inner region 62 of the buffer layer 22, and an electrode (e.g., a second electrode 34) provided on the active layer 26. The optical semiconductor apparatus 10 further including: a package substrate 14 on which the optical semiconductor device 12 is mounted; and a sealing part 16 that seals a space between the seal ring and the package substrate 14.