Patent ID: 8005125

Claim:
A line coaxial laser diode having a semiconductor light source structure formed by extending the axial length of the coaxial laser diode, comprising: a coaxial axial electrode to supply electricity, an outer annular conductor, and a plurality of coaxial annular semiconductor layers located therebetween to generate axial direction stimulated emission through laser amplification, wherein the coaxial annular semiconductor layers comprise a P + -type semiconductor layer formed on the coaxial axial electrode, a P-type annular confinement layer formed on the P + -type semiconductor layer, a P-type active action layer formed on the P-type annular confinement layer and an N-type confinement layer formed on the P-type annular active action layer, and the coaxial line laser diode receives a coaxial annular Bragg's grating feedback function distributed axially at an extended length.