880-nm-Diode-Laser-End-Pumped Electrooptically Q-Switched Nd:YLF Laser With High Energy and Good Beam Quality at 1047 nm and 1 kHz
An electrooptically Q-switched Nd:YLF laser end-pumped by an 880-nm laser diode with high energy and short pulsewidth at 1 kHz is demonstrated. The asymmetry of the focal lengths of thermal lens along the <inline-formula> <tex-math notation="LaTeX">$a$</tex-math></inli...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2016-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/7378830/ |
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| Summary: | An electrooptically Q-switched Nd:YLF laser end-pumped by an 880-nm laser diode with high energy and short pulsewidth at 1 kHz is demonstrated. The asymmetry of the focal lengths of thermal lens along the <inline-formula> <tex-math notation="LaTeX">$a$</tex-math></inline-formula>-axis and <inline-formula> <tex-math notation="LaTeX">$c$</tex-math></inline-formula>-axis is observed, and the cylindrical lens is used to compensate for the thermal lens effect along the <inline-formula> <tex-math notation="LaTeX">$a$</tex-math></inline-formula>-axis. We experimentally studied the performance of the Nd:YLF laser with different combinations of the output coupler transmission <inline-formula> <tex-math notation="LaTeX">$T$</tex-math></inline-formula> and the focal length <inline-formula> <tex-math notation="LaTeX">$f$</tex-math></inline-formula> of cylindrical lens. With <inline-formula> <tex-math notation="LaTeX">$T=40\%$</tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$f=300\ \text{mm}$</tex-math></inline-formula>, 9.5-mJ pulse energy, 9.5-ns pulsewidth, and beam quality factors of <inline-formula> <tex-math notation="LaTeX">$M_{x}^{2}=1.74$</tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$M_{y}^{2}=1.97$</tex-math></inline-formula> are obtained. Moreover, the relationships between the pulse width and pump power as well as beam transverse mode were experimentally studied and discussed. |
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| ISSN: | 1943-0655 |