High Power 1 150 nm Vertical External-cavity Surface Emitting Semiconductor Laser
Aiming at the application requirements of orange-yellow laser in the fields of laser medicine,food and drug detection,we have carried out research on high-power fundamental frequency 1 150 nm vertical external cavity surface emitting semiconductor laser(VECSEL).In this paper,a large-size fundamental mode spot external cavity structure in the laser resonant cavity is proposed to make the VECSEL cavity mode match the larger pump spot size to achieve high-power laser output.The gain peak-cavity mode detuning structure is proposed.The gain peak is differ-ent from the temperature drift coefficient of the cavity mode.The gain peak-cavity mode matching is good at high pump power,and the laser wavelength stability control under high pump power is realized.The output power of the VECSEL device prepared by us reaches 9.38 W at the laser wavelength of 1 150 nm,and a good circular symmetri-cal output spot morphology is obtained.The divergence angles of the spot in the orthogonal direction are 7.3° and 7.5°,respectively.
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