Improvement of stability and efficiency in diode-pumped passively Q-switched intracavity optical parametric oscillator with a monolithic cavity

Autor: Yung-Fu Chen, W. Z. Zhuang, Y. J. Huang, Kuan-Wei Su, Y. P. Huang, Jung Y. Huang
Rok vydání: 2012
Předmět:
Zdroj: Laser Physics Letters. 9:485-490
ISSN: 1612-202X
1612-2011
DOI: 10.7452/lapl.201210023
Popis: We improve the performance of intracavity opti- cal parametric oscillator (IOPO) pumped by a diode-pumped Q-switched Nd:YVO4/Cr 4+ :YAG laser. The IOPO cavity is formed independently by a monolithic KTP crystal that the mir- rors are directly deposited on top of the nonlinear crystal. We study the performances of this IOPO cavity with different re- flectivity of the output coupler at 1.5 m (Rs) of 80 and 50%. The average power of 1.5 m is up to 3.3 W at the maximum pump power of 16.8 W for both cases. The diode-to-signal con- version efficiency is up to 20%, which is the highest one for IO- POs to our best knowledge. At the maximum pump power, the pulse energies are 41 J with the pulse width of 3 ns at a pulse repetition rate (PRR) of 80 kHz for Rs =80% and 51 J with the pulse width of 1.2 ns at a PRR of 65 kHz for Rs =50%, re- spectively. The pulse amplitude fluctuations in standard devia- tion are 2.6% for Rs =80% and 4% for Rs =50%, respectively.
Databáze: OpenAIRE
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