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Proceedings Paper

Study on simultaneous passive Q-switching and mode-locking at low-pump power in a LD-pumped Nd3+:YVO4-Cr4+:YAG laser
Author(s): Yang Liu; Hongyun Qiu; Liqun Sun; Qian Tian
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Paper Abstract

Simultaneous passive Q-Switching and mode locking at low pump power was observed in a Laser Diode (LD) pumped Nd3+:YVO4-Cr4+:YAG laser, detailed studies were experimentally carried out. A fiber-coupled LD with maximum output power of 2 W is used as pump source. In a 50cm long cavity, the repetition rate of obtained mode-locking pulse train is about 300MHz, and the pulse duration was estimated to be at sub-nanosecond level. The repetition rate of the passive Q-Switched pulse train varies from 10kHz~130kHz with the increasing of the pump power. It was found that the threshold of incident pump power to generate mode-lock in such a laser is dependent on the position of Cr4+:YAG crystal inside the cavity. Select proper Cr4+:YAG as saturable absorber and optimize its position, simultaneous Q-Switching and mode-locking occurred in the Nd3+:YVO4 laser at pump power as low as about 200 mW. The experimental result demonstrates the possibility of obtains ultra short optical pulse in a simple and low cost way, which is of great interest in some applications.

Paper Details

Date Published: 26 January 2005
PDF: 7 pages
Proc. SPIE 5627, High-Power Lasers and Applications III, (26 January 2005); doi: 10.1117/12.573704
Show Author Affiliations
Yang Liu, Tsinghua Univ. (China)
Hongyun Qiu, Tsinghua Univ. (China)
Liqun Sun, Tsinghua Univ. (China)
Qian Tian, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 5627:
High-Power Lasers and Applications III
Dianyuan Fan; Ken-ichi Ueda; Jongmin Lee, Editor(s)

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