Dual-rod Yb: YAG laser for high-power and high-brightness applications

Conference · Mon Mar 13 04:00:00 EST 2000

OSTI ID:756836

Honea, E C ^[1]; Beach, R; Mitchell, S C; Skidmore, J A; Emanuel, M A; Sutton, S B; Payne, S A; Avizonis, P V; Monroe, R S; Harris, D G

---

1. LLNL

The authors describe a diode-pumped Yb:YAG laser producing 1,080 W cw with 27.5% optical-optical efficiency and 532 W Q-switched with M{sup 2} = 2.2 and 17% optical-optical efficiency. The laser uses two composite Yb:YAG rods separated by a 90 degree quartz rotator for bifocusing compensation. A microlensed diode array end-pumps each rod using a hollow lens duct for pump delivery. By changing resonator parameters, they can adjust the fundamental mode size and the output beam quality. Using a flattened gaussian intensity profile to calculate the mode fill efficiency and clipping losses, the authors compare experimental data to modeled output power vs beam quality.

• Research Organization: Lawrence Livermore National Lab., CA (US)
• Sponsoring Organization: USDOE Office of Defense Programs (DP) (US)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 756836
• Report Number(s): UCRL-JC-135925; YN0100000; YN0100000
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ALUMINIUM OXIDES
DOPED MATERIALS
FERRITE GARNETS
LASER MATERIALS
OPTICAL PUMPING
Q-SWITCHING
QUANTUM EFFICIENCY
SOLID STATE LASERS
YTTERBIUM
YTTRIUM COMPOUNDS