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Maximum output power of 285 mW is achieved at 2080 nm (Ho3+ emission) with a slope efficiency of 8.3% in a compact intracavity-pumped microchip Ho-laser using stacked Tm:KLuW / Ho:KLuW Nε-cut crystals.
A diode-pumped Tm, Ho:KLu(WO4)2 microchip laser Q-switched by a Cr2+:ZnS saturable absorber generated average output power of 131 mW at 2061 nm. The shortest pulses had duration of 9 ns and energy of 10 μJ.
RbTiOPO4 (RTP) belongs to the KTiOPO4 (KTP) family of crystals and has similarly useful nonlinear optical properties. In addition, RTP allows higher doping of rare-earth elements, such as Yb3+, when compared to KTP, a 2 times larger damage threshold than KTP, a very large electro-optic coefficient, a low dielectric constant and high chemical stability, which makes these materials very interesting...
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