Patent ID: 7526009

Claim:
An external cavity surface emitting laser comprising: a laser chip package provided with a laser chip emitting light at a first wavelength by optical pumping; an external mirror spaced apart from a top surface of the laser chip package to transmit a portion of the light emitted from the laser chip to the outside and to reflect the remainder of the light to the laser chip; a heat sink coupled to a bottom surface of the laser chip package to dissipate heat generated by the laser chip; and a pump laser facing a bottom surface of the heat sink to emit pump light at a second wavelength substantially perpendicular to the laser chip, wherein the laser chip package includes: a thermally conductive and transparent submount; and the laser chip attached to the submount to emit the first wavelength light to the external mirror, wherein the submount transfers the heat generated by the laser chip toward the heat sink, and wherein the laser chip includes: a substrate; an active layer having a quantum well structure formed on the substrate, the active layer being activated by the pump light emitted from the pump laser to emit the first wavelength light; and a DBR (distributed Bragg reflector) layer formed on the active layer to reflect the first wavelength light emitted from the active layer to the external mirror and to transmit the second wavelength pump light emitted from the pump laser.