Comparison of Small-Scale Actively and Passively Q-Switched Eye-Safe Intracavity Optical Parametric Oscillators at 1.57 μm

The first experimental comparison between the actively and passively Q-switched intracavity optical parametric oscillators (IOPOs) at 1.57 mu m driven by a small-scale diode-pumped Nd:YYO sub(4) laser are thoroughly presented. It is found that the performances of the two types of IOPOs are complemen...

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Bibliographic Details
Published in:Chinese physics letters 2012-07, Vol.29 (7), p.74201-1-074201-4
Main Authors: Miao, Jie-Guang, Pan, Yu-Zhai, Qu, Shi-Liang
Format: Article
Language:English
Subjects:
Conversion
Eye-safe lasers
Lasers
Optical Parametric Oscillators
Pulse duration
Small scale
Stability
Thresholds
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Summary:The first experimental comparison between the actively and passively Q-switched intracavity optical parametric oscillators (IOPOs) at 1.57 mu m driven by a small-scale diode-pumped Nd:YYO sub(4) laser are thoroughly presented. It is found that the performances of the two types of IOPOs are complementary. The actively Q-switched IOPO features a shorter pulse duration, a higher peak power, and a superior power and pulse stability. However, in terms of compactness, operation threshold and conversion efficiency passively Q-switched IOPOs are more attractive. It is further indicated that the passively Q-switched IOPO at 1.57 mu m is a promising and cost-effective eye-safe laser source, especially at the low and moderate output levels. In addition, instructional improvement measures for the two types of IOPOs are also summarized.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/29/7/074201