Optically-pumped vertical external cavity surface emitting laser

A vertical external cavity surface emitting laser (VECSEL) is provided in which a pump laser beam is incident on a laser chip at a right angle. In the surface emitting laser, a laser chip emits light at a first wavelength by optical pumping, an external mirror is spaced apart from the laser chip to reflect the first wavelength light emitted from the laser chip back to the laser chip, a pump laser emits light at a second wavelength to cause the laser chip to lase, a wavelength selecting mirror is disposed between the laser chip and the external mirror to reflect the second wavelength light emitted from pump laser to the laser chip and to transmit the first wavelength light emitted from the laser chip, and an optical unit is disposed between the wavelength selecting mirror and the laser chip to focus the first wavelength light on an optical path between the external mirror and the wavelength selecting mirror and to focus the second wavelength light on the laser chip.