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Continuous-wave operation at 1386 nm in a diode-end-pumped Nd:YVO4 laser

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Abstract

We report a diode-end-pumped continuous wave (cw) Nd:YVO4 laser operation at 1386 nm. A maximum output power of 305 mW is achieved at an incident pump power of 4.24 W, achieving a slope efficiency of 13.9%. To the best of our knowledge, this is the first time that cw operation at this transition of Nd:YVO4 crystal is reported. By using the experimentally measured threshold data, the stimulated-emission cross-section of this gain medium at 1386 nm transition is determined to be 3 × 10-19cm2. In addition, simultaneous cw operation at 1342 nm and 1386 nm is also observed.

©2005 Optical Society of America

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Figures (5)

Fig. 1.
Fig. 1. Transitions from 4 F 3/2 to 4 I 13/2 manifold and their energy.
Fig. 2.
Fig. 2. Fluorescence spectrum of Nd:YVO4 crystal from 1200 nm to 1500 nm
Fig. 3.
Fig. 3. The schematic of the experimental setup.
Fig. 4.
Fig. 4. Output power at 1386 nm Vs incident pump power
Fig. 5.
Fig. 5. Spectrum of 1386-nm laser emission

Equations (2)

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σ e = π ( ω p 2 + ω c 2 ) hv p ( T + L ) 4 P th τ f η p .
η p = 1 l 0 l dz 4 ω p 2 ( z ) ω c 2 ( z ) ( ω p 2 ( z ) + ω c 2 ( z ) ) 2 .
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