Page 232 - High Power Laser Handbook

200 So l i d - S t at e La s e r s Zigzag Slab Lasers 201

Microlensed Lens duct
diode array

Evanescent wave-
Microchannel coated slab
slab cooler
Figure 8.15 400-W Nd:YAG CCEPS gain module and key components.

and 380 W of linearly polarized output with an M beam quality of
2
1.8, from a hybrid stable-unstable resonator (stable in the 1.7-mm
dimension; unstable in the 5.6 mm dimension). Figure 8.15 shows
the gain module with the key components, while Figure 8.16 shows
the output power as a function of diode power, as well as the far-
field intensity distribution of the output beam.

8.4.3 Power Scaling
The initial results were the foundation for scaling individual CCEPS-
based gain modules to 4 times higher power than was achievable,

450
400
350
Laser power out (W) 250
300

200
150
100
Far field (376 W)
50
0
300 400 500 600 700 800 900 1000110012001300
Diode power in (W)

Figure 8.16 Nd:YAG CCEPS laser performance with a hybrid stable-unstable
resonator.