| 摘要 |
A vertical external cavity surface emitting laser is provided to increase optical conversion efficiency by including a semiconductor filter or a dielectric filter having high wavelength selectivity. A vertical external cavity surface emitting laser includes a semiconductor chip(103), an external mirror(120), a pump laser(105), a secondary harmonic wave generation element(115), and a semiconductor filter(110). The semiconductor chip(103) has an active layer which emits a beam of a predetermined wavelength, and a reflective layer which reflects the beam generated in the active layer. The external mirror(120) is arranged to be opposite to the active layer, amplifies the beam by reflecting repeatedly the beam emitted from the active layer to the reflective layer, and outputs the amplified beam to the outside. The pump laser(105) provides a pump beam to excite the active layer. The second harmonic wave generation element(115) is arranged between the semiconductor chip(103) and the external mirror(120), and changes a wavelength of the beam emitted from the active layer. The semiconductor filter(110) is bonded to the second harmonic wave generation element(115).
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