We report an efficient operation of a kilohertz nanosecond extracavity KGd(WO 4 ) 2 (KGW) crystal Raman yellow laser, which is pumped by a 532 nm lasers based on pulse laser diode (LD) side pumped ceramic Nd : YAG, BBO electro optical Q switched and LBO crystal extracavity frequency doubling. With the 5 W, 10 ns and 1 kHz output power pumped at 532 nm, we obtained 2.58 W, 7.4 ns, 1 kHz second Stokes Raman laser output at 579.54 nm for 768 cm -1 Raman shift of KGW crystal, corresponding to a conversion efficiency of 51.4%. By changing the KGW crystal orientation, we further obtained 3.18 W, 7.8 ns, 1 kHz Raman pulses at 588.33 nm for 901 cm -1 Raman shift, corresponding to a conversion efficiency of 63.3%.The beam quality factors M 2 of 579.54 and 588.33 nm were ( = 5.829, = 6.336) and ( = 6.405, = 6.895), respectively.

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