Unstable resonators with excited converging wave

Journal Article · Sun Apr 01 00:00:00 EST 1990 · IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/3.53391· OSTI ID:6873744

Hodgson, N ^[1]; Weber, H ^[2]

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1. Optisches Institut, Technische Universitat Berlin, Strasse des 17. Juni 135, 1000 Berlin 12 (DE)
2. Festkoerper-Laser-Institut Berlin GmbH, Strasse des 17, Juni 135, 1000 Berlin (DE)

This paper reports the properties of unstable resonators with an additional mirror inside or outside the resonator investigated, both experimentally and theoretically. The additional mirror excites the converging wave, and by this, output coupling is decreased without affecting beam quality. Experiments were performed with a pulsed Nd:YAG system. The theoretical model was based on the coupled Kirchhoff integrals and solved numerically. Agreement between theory and experiments indicates that this kind of resonator provides high focusability and maximum extraction efficiency simultaneously, even with low-gain media. This enables one to apply unstable resonators to solid-state lasers with low small-signal gain, like alexandrite or CW-pumped Nd:YAG.

• OSTI ID: 6873744
• Journal Information: IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (USA), Vol. 26:4; ISSN 0018-9197
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CAVITY RESONATORS
LASER MIRRORS
BEAM OPTICS
EXCITED STATES
EXPERIMENTAL DATA
GAIN
NEODYMIUM LASERS
PULSE GENERATORS
SOLID STATE LASERS
AMPLIFICATION
DATA
ELECTRONIC EQUIPMENT
ENERGY LEVELS
EQUIPMENT
FUNCTION GENERATORS
INFORMATION
LASERS
MIRRORS
NUMERICAL DATA
RESONATORS
426002* - Engineering- Lasers & Masers- (1990-)