Negative-branch unstable resonator with a phase unifying output coupler for high power Nd:Yag lasers

Journal Article · Tue Mar 20 00:00:00 EST 1990 · Applied Optics; (USA)

DOI:https://doi.org/10.1364/AO.29.001277· OSTI ID:7120728

Yasui, K ^[1]; Yagi, S ^[2]; Tanaka, M ^[3]

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1. Stanford University, Ginzton Laboratories, Stanford, California 94305-4085 (USA)
2. Mitsubishi Electric Corporation, Central Research Laboratory, 8-1-1 Tsukaguchi-Honmachi, Amagasaki, Hyogo 661, Japan (JP)
3. Mitsubishi Electric Corporation, Manufacturing Development Laboratory, 8-1-1 Tsukaguchi-Honmachi, Amagasaki, Hyogo 661, Japan (JP)

Large symmetrical near-diffraction-limited beams 6 mm in diameter with a divergence angle of 1.2 mrad have been extracted from a 0.6% doped Nd:YAG rod pumped by a Kr-arc lamp using a negative-branch unstable resonator with a phase-unifying output coupler. The slope efficiency was 2.6%, the maximum peak laser power was 300 W and the maximum average laser power was 23 W. The misalignment angle of the output coupler to decrease the laser powers by 20% was 2.75 mrad. Key words: Laser resonator, unstable resonator, solid state laser, Nd:YAG laser.

• OSTI ID: 7120728
• Journal Information: Applied Optics; (USA), Vol. 29:9; ISSN 0003-6935
• Country of Publication: United States
• Language: English

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42 ENGINEERING
LASER CAVITIES
INSTABILITY
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ALUMINIUM COMPOUNDS
CAVITY RESONATORS
EFFICIENCY
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NEODYMIUM ADDITIONS
POWER RANGE 100-1000 W
YTTRIUM COMPOUNDS
ALLOYS
ELECTRONIC EQUIPMENT
EQUIPMENT
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OXYGEN COMPOUNDS
POWER RANGE
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
RESONATORS
SILICATES
SILICON COMPOUNDS
SOLID STATE LASERS
TRANSITION ELEMENT COMPOUNDS
WATT POWER RANGE
426002* - Engineering- Lasers & Masers- (1990-)