Abstract
We present three different dual-wavelength laser architectures to obtain cw blue radiations. They are based on diode-pumped Nd-doped crystals lasing on the 4F3/2-4I11/2 and 4F3/2-4I9/2 transitions. Blue radiations were achieved by intracavity sum frequency operation in a BiB3O6 crystal. We report a maximum output blue power of 303 mW at 491 nm for a pump power of 10 W.
Highlights
Lasers emitting in the visible range are useful in many fields, such as full-colour displays, astronomy or biology
Efficient continuous lasers in the visible range are usually based on the same principle: intracavity frequency doubling of a diode pumped solid state laser
The most powerful configuration offers a cw power of 15W at 488 nm [7] for a pump power of 80 W, but most of other solutions offer a power around 50 mW of blue power [8]
Summary
Lasers emitting in the visible range are useful in many fields, such as full-colour displays, astronomy or biology. The most powerful configuration offers a cw power of 15W at 488 nm [7] for a pump power of 80 W, but most of other solutions offer a power around 50 mW of blue power [8] Another solution to reach 488 nm is to use sum frequency operation instead of simple second harmonic generation. This has already been demonstrated to reach the yellow range [9]. The second configuration is based on two laser crystals, Nd:YLF (1047 nm) and Nd:GdVO4 (912 nm), to avoid line competition. They are placed in the same cavity and pumped by the same diode laser. The last architecture is based on two separate lasers linked by a common arm, where the nonlinear crystal is placed
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