Efficient generation of coherent blue light at 440 nm by intracavity-frequency-tripling 1319-nm emission from a Nd:YAG laser.
A new route for efficiently generating coherent blue light has been explored based on intracavity effective third-harmonic generation in one partly periodically poled KTiOPO4 crystal placed inside the cavity of a diode-pumped Nd:YAG laser. To achieve efficient conversion, we use a dual-temperature oven to separately control the phase-matching conditions for the two second-order nonlinear processes. In addition, a Fabry-Perot cavity at 660 nm is incorporated into the crystal to increase the blue power significantly. When the laser is Q switched to produce long pulses, an average power of 118 mW is generated at 440 nm at a pump power of 10 W.
Department of Electrical and Computer Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, USA.
Xiaodong
X
Mu
Yujie J
YJ
Ding