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http://dx.doi.org/10.3807/KJOP.2002.13.4.347

Design and operational characteristics of cw and KLM Ti : sapphire lasers with a symmetric Z-type cavity configuration  

Choo, Han-Tae (School of Natural Science, Kumoh National Institute of Technology)
Ahn, Bum-Soo (School of Natural Science, Kumoh National Institute of Technology)
Kim, Gyu-Ug (School of Natural Science, Kumoh National Institute of Technology)
Lee, Tae-Dong (School of Natural Science, Kumoh National Institute of Technology)
Yoon, Byoung-Won (Superconductor Group, Korea Research Institute of Standards and Science)
Publication Information
Korean Journal of Optics and Photonics / v.13, no.4, 2002 , pp. 347-355 More about this Journal
Abstract
We have constructed a high efficiency and broad tunable cw Ti:sapphire laser with a four-mirror symmetric Z-type laser cavity to increase the laser usability. From theoretical analyses and experimental data for a symmetric Z-type laser cavity containing a Kerr medium, the cavity mode size and the Kerr-lens mode-locking (KLM) strength for KLM lasers can be confirmed as function of the position in the cavity, the intracavity laser power, and the stability parameter. As a result, the slope efficiency and the maximum average output power of cw Ti:sapphire laser at 5 W pumping power of Ar-ion laser were 31.3% and 1420 ㎽ respectively. The tunablility was ranged from 730 ㎚ to 908 ㎚ with average output power above 700 ㎽. We obtained the KLM operation easily by self-aperturing effect in the Kerr medium and the slope efficiency and the maximum average output power of KLM Ti:sapphire laser was 16% and 550 ㎽ respectively. The spectral bandwidth was 33 ㎚ at the center wavelength of 807 ㎚ and the pulse width was 27 fs with a repetition rate of 82 ㎒.
Keywords
Laser principles; Solid-state laser; Ultrashort pulse;
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