We describe a novel side-pumping configuration of the virtual-point-source diode-array-pumped Nd:YAG laser with 32 cw 10-W laser diodes. A new concept of the virtual point source and an image-relay system are proposed for the generation of a Gaussian-like pumping profile with an optically thin gain medium. A cw linearly polarized TEM00-mode, 26.5-W output was obtained at a diode pump power of 171 W. The M2 values at the x and y axes were measured to be Mx2=1.03 and My2=1.20, respectively.

© 1995 Optical Society of America

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1995 (2)

1994 (2)

1993 (1)

1992 (1)

1986 (1)

Alfrey, A. J.

Bowers, M. S.

Byer, R. L.

Byers, R. L.

Farinas, A. D.

Freitag, I.

Golla, D.

Gustafson, E. K.

Kaneda, Y.

Knoke, S.

Kubota, S.

Magni, V.

Masuda, H.

Oka, M.

Schöne, W.

Seamans, J. F.

Shine, R. J.

Tidwell, S. C.

Tünnermann, A.

Welling, H.

Zellmer, H.

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Figures (4)

Fig. 1
Fig. 1

Experimental setup of the VPS 32 cw 10-W diode-array- pumped Nd:YAG laser. FT, flow tube; M1, 5-m radius-of-curvature high-reflectance mirror; M2, flat output coupler (77.5% reflectance).

Fig. 2
Fig. 2

Calculated pumping profiles in a Nd:YAG rod of 3.0-mm diameter for (a) the first pass, (b) the second pass, (c) the total passes.

Fig. 3
Fig. 3

Measured input and output characteristics. The open and filled circles show random-polarization operation (without a Brewster plate) and linear-polarization operation (with a Brewster plate), respectively. The maximum output power of 26.5 W with a cw linearly polarized TEM00 mode was obtained at a diode pump power (Pin) of 171 W.

Fig. 4
Fig. 4

Measured contour plot of the linearly polarized output beam 100 cm from the output mirror with a 26.5-W output power.

Equations (2)

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d ρ ( r ) d r = ρ ( r ) ( α - 1 r ) .
ρ ( r ) = ρ ( R ) R r exp [ α ( r - R ) ] ,