Patent ID: 7385753

Claim:
A hybrid optical amplifier using a GCSOA enabling Raman amplification, the hybrid optical amplifier comprising: a spool of optical fiber used as transmission line in the optical communication; a GCSOA amplifying optical signal input via the optical fiber and generating a self-oscillation laser for gain-clamping through the gain medium; and a backward pumping ROA inducing Raman amplification by emitting the self-oscillation laser beam generated by the GCSOA into the optical fiber, and wherein the GCSOA comprises: a substrate layer made of an InP substrate; a lower cladding layer in which DBRs for selecting a wavelength of the self-oscillation laser beam are engraved, formed directly on the substrate layer; an active layer which is formed directly on the lower cladding layer, amplifying the optical signal input via the optical fiber; an upper cladding layer formed directly on the active layer; a metal layer, which is formed directly on the upper cladding layer, forming electrodes to supply driving-current to the GCSOA; a second optical fiber inputting optical signal output from the first said GCSOA and compensating dispersion; and a second GCSOA amplifying optical signal input via the second optical fiber and generating a second self-oscillation laser beam for gain-clamping through the gain medium.