3.8 W of cw blue light generated by intracavity frequency doubling of a 946-nm Nd:YAG laser with LBO
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- Chen, Y., Peng, H., Hou, W. et al. Appl. Phys. B (2006) 83: 241. doi:10.1007/s00340-006-2150-0
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Efficient cw intracavity frequency doubling of a diode-end-pumped Nd:YAG laser operating on 4F3/2→4I9/2 transitions at 946 nm has been demonstrated. A symmetrical cavity with two composite laser rods was designed, which divides the pump power between the two composite laser rods, allowing for greater power scalability. A 30-mm-long LiB3O5 (LBO) crystal, cut for critical type I phase matching at 57 °C, was used for the intracavity frequency doubling of the laser. A maximum output power of 3.8 W in the blue spectral range at 473 nm has been achieved at 39 W of pump power. The beam quality M2 value is 2.3 in both horizontal and vertical dimensions.