Efficient operation of a Nd:YAG laser on the low-gain 1123-nm transition by end pumping with the reshaped output from a 7-W diode bar is reported. Using a simple standing-wave laser configuration and pumping with 5.6 W of incident power yielded a laser output power of 1.7 W in a near-diffraction-limited TEM<sub>00</sub> mode with a beam quality factor of <sup><i>M</i></sup> ≲ .. A unidirectional single-frequency ring laser was also constructed, yielding 180 mW of single-frequency output. The prospects for further increase in power by optimization of the resonator design are discussed.
© 1999 Optical Society of America
(140.3460) Lasers and laser optics : Lasers
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3530) Lasers and laser optics : Lasers, neodymium
(140.3560) Lasers and laser optics : Lasers, ring
Nicholas Moore, W. Andrew Clarkson, David C. Hanna, Stefan Lehmann, and Jens Bösenberg, "Efficient Operation of a Diode-Bar-Pumped Nd:YAG Laser on the Low-Gain 1123-nm Line," Appl. Opt. 38, 5761-5764 (1999)