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RbTiOPO 4 cascaded Raman operation with multiple Raman frequency shifts derived by Q-switched Nd:YAlO 3 laser

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ABSTRACT

An intra-cavity RbTiOPO4 (RTP) cascade Raman laser was demonstrated for efficient multi-order Stokes emission. An acousto-optic Q-switched Nd:YAlO3 laser at 1.08 μm was used as the pump source and a 20-mm-long x-cut RTP crystal was used as the Raman medium to meet the X(Z,Z)X Raman configuration. Multi-order Stokes with multiple Raman shifts (~271, ~559 and ~687 cm−1) were achieved in the output. Under an incident pump power of 9.5 W, a total average output power of 580 mW with a pulse repetition frequency of 10 kHz was obtained. The optical conversion efficiency is 6.1%. The results show that the RTP crystal can enrich laser spectral lines and generate high order Stokes light.

No MeSH data available.


Experimental configuration of the RTP intracavity Raman laser pumped by Nd:YAlO3 laser.
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f1: Experimental configuration of the RTP intracavity Raman laser pumped by Nd:YAlO3 laser.

Mentions: As reported by Kugel et al.28 and Watson17, the strongest Raman scattering of RTP with the orthorhombic non-centro symmetric space group Pna21 and point group C2v (mm2) was obtained from the A1 (ZZ) geometry. An RTP single crystal 4 × 4 × 20 mm3 in size, along x-axis cut was used as the Raman crystal. A b-cut, 0.9 at.% doped Nd:YAlO3 crystal with a size of Φ3.6 × 7 mm3 was used as the laser crystal for polarized laser oscillation. The polarization of the fundamental light is fixed parallel to the z-axis of RTP to meet the X(Z,Z)X Raman configuration in this experiment. A schematic diagram of the experimental setup is shown in Fig. 1.


RbTiOPO 4 cascaded Raman operation with multiple Raman frequency shifts derived by Q-switched Nd:YAlO 3 laser
Experimental configuration of the RTP intracavity Raman laser pumped by Nd:YAlO3 laser.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5036053&req=5

f1: Experimental configuration of the RTP intracavity Raman laser pumped by Nd:YAlO3 laser.
Mentions: As reported by Kugel et al.28 and Watson17, the strongest Raman scattering of RTP with the orthorhombic non-centro symmetric space group Pna21 and point group C2v (mm2) was obtained from the A1 (ZZ) geometry. An RTP single crystal 4 × 4 × 20 mm3 in size, along x-axis cut was used as the Raman crystal. A b-cut, 0.9 at.% doped Nd:YAlO3 crystal with a size of Φ3.6 × 7 mm3 was used as the laser crystal for polarized laser oscillation. The polarization of the fundamental light is fixed parallel to the z-axis of RTP to meet the X(Z,Z)X Raman configuration in this experiment. A schematic diagram of the experimental setup is shown in Fig. 1.

View Article: PubMed Central - PubMed

ABSTRACT

An intra-cavity RbTiOPO4 (RTP) cascade Raman laser was demonstrated for efficient multi-order Stokes emission. An acousto-optic Q-switched Nd:YAlO3 laser at 1.08 μm was used as the pump source and a 20-mm-long x-cut RTP crystal was used as the Raman medium to meet the X(Z,Z)X Raman configuration. Multi-order Stokes with multiple Raman shifts (~271, ~559 and ~687 cm−1) were achieved in the output. Under an incident pump power of 9.5 W, a total average output power of 580 mW with a pulse repetition frequency of 10 kHz was obtained. The optical conversion efficiency is 6.1%. The results show that the RTP crystal can enrich laser spectral lines and generate high order Stokes light.

No MeSH data available.