Article

Comparison of a diode pumped Er:YSGG and Er:YAG laser in the bounce geometry at the 3 μm transition.

The Blackett Laboratory, Imperial College London, London, UK.
Optics Express (impact factor: 3.59). 12/2011; 19(27):25860-5. pp.25860-5
Source: PubMed

ABSTRACT A comparative study is made of the laser crystals 50 at. % Er:YAG and 50 at. % Er:YSGG. Both lasers are constructed in the bounce geometry with quasi continuous wave (QCW) diode pumping. In Er:YAG, pulse energies of up to ~31mJ, slope efficiency of 12.6% and a red-shift in laser wavelength are observed with a final and dominant wavelength of 2.936μm. In Er:YSGG, higher performance is achieved with pulse energies of ~55mJ, slope efficiency of 20.5% and a single transition wavelength of 2.797μm observed. The study indicates that diode pumped Er:YSGG is a superior laser source at 3μm than Er:YAG and it has greater energy storage potential for Q-switched operation.

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Keywords

comparative study
 
diode
 
dominant wavelength
 
higher performance
 
laser crystals 50
 
laser wavelength
 
Q-switched operation
 
quasi continuous wave
 
single transition wavelength
 
slope efficiency
 

Emma Arbabzadah