Compact passively Q-switched Raman laser at 1176&#x2009;&#x2009;nm and yellow laser at 588&#x2009;&#x2009;nm using Nd<sup>3+</sup>:YAG/Cr<sup>4+</sup>:YAG composite crystal

Wei Jiang; Siqi Zhu; Xuezhang Chen; Yumeng Liu; Zhenqiang Chen; Hao Yin; Zhen Li; Sue Wang; Yihong Chen

doi:10.1364/AO.53.001328

Applied Optics
Vol. 53,
Issue 7,
pp. 1328-1332
(2014)
•https://doi.org/10.1364/AO.53.001328

Compact passively Q-switched Raman laser at 1176 nm and yellow laser at 588 nm using Nd³⁺:YAG/Cr⁴⁺:YAG composite crystal

Wei Jiang, Siqi Zhu, Xuezhang Chen, Yumeng Liu, Zhenqiang Chen, Hao Yin, Zhen Li, Sue Wang, and Yihong Chen

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Wei Jiang, Siqi Zhu, Xuezhang Chen, Yumeng Liu, Zhenqiang Chen, Hao Yin, Zhen Li, Sue Wang, and Yihong Chen, "Compact passively Q-switched Raman laser at 1176 nm and yellow laser at 588 nm using Nd³⁺:YAG/Cr⁴⁺:YAG composite crystal," Appl. Opt. 53, 1328-1332 (2014)

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Abstract

Compact passively $Q$ -switched ${YVO}_{4}$ first Stokes Raman laser and its frequency doubling laser were reported by using ${Nd}^{3 +} : YAG / {Cr}^{4 +} : YAG$ composite crystal for what is believed to be the first time. Nanosecond lasers at 1176 and 588 nm were obtained. At the incident pump power of 7.84 W, the average output power at 1176 nm was 423 mW with a pulse width of 1.32 ns and the pulse repetition frequency (PRF) of 13.7 kHz. By applying a KTP crystal, an intracavity second harmonic generation (SHG) laser at 588 nm also was realized. With an incident pump power of 8.95 W, we obtained 105.3 mW average output power of a yellow laser corresponding to the pulse width of 4.95 ns and the PRF of 10.75 kHz. In addition, the composite crystal efficiently compacted the resonant cavity.

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	Output at 1176 nm	Output at 588 nm
$M_{1}$	Plane mirror S1:AR at 808 nm ( $R < 0.5 %$ ); S2:HT at 808 nm ( $T \geq 95 %$ ) HR at 1064 & 1176 nm ( $R > 99.8 %$ )	$R = 300 mm$ S1:AR at 808 nm ( $R < 0.5 %$ ); S2:HT at 808 nm ( $T \geq 95 %$ ) HR at 1064 & 1176 nm( $R > 99.8 %$ )
$M_{2}$	Plane mirror S1:HR at 1064 nm ( $R \geq 99.8 %$ ) PR at 1176 nm ( $R = 95 %$ ); S2:AR at 1176 nm ( $R < 0.5 %$ )	$R = 100 mm$ S1:AR at 808 nm ( $R < 0.5 %$ ); S2:HT at 808 nm ( $T \geq 95 %$ ) HR at 1064 & 1176 nm ( $R > 99.8 %$ )
${Nd}^{3 +} : YAG / {Cr}^{4 +} : YAG$	S1/S2:AR at 1064 & 1176 nm ( $R < 1 %$ )
${YVO}_{4}$	S1:AR at 1064 & 1176 nm ( $R < 1 %$ ); S2: AR at 1064 & 1176 nm ( $R < 1 %$ ) HR at 588 nm ( $R > 99.8 %$ )
KTP	S1/S2:AR at 1176 & 588 nm ( $R < 1 %$ )

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Applied Optics