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20‐W average power, high repetition rate, nanosecond pulse with diffraction limit from an all‐fiber MOPA system
Author(s) -
Du Songtao,
Zhou Jun,
Zhang Fangpei,
Feng Yutong,
Lou Qihong,
Chen Weibiao
Publication year - 2008
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.23770
Subject(s) - nanosecond , amplifier , multi mode optical fiber , materials science , optics , fiber laser , fiber , pulse (music) , power (physics) , diffraction , pulse repetition frequency , optoelectronics , laser , optical fiber , telecommunications , physics , computer science , cmos , quantum mechanics , detector , composite material , radar
In this article, we report an all‐fiber master oscillator power amplifier (MOPA) system, which can provide high repetition rate and nanosecond pulse with diffraction‐limit. The system was constructed using a (2 + 1) × 1 multimode combiner. The Q‐Switched, LD pumped Nd:YVO 4 solid‐state laser was used as master oscillator. The 976‐nm fiber‐coupled module is used as pump source. A 10‐m long China‐made Yb 3+ ‐doped D‐shape double‐clad large‐mode‐area fiber was used as amplifier fiber. The MOPA produced as much as 20‐W average power with nanosecond pulse and near diffraction limited. The pulse duration is maintained at about 15 ns during 50–175 kHz. The system employs a simple and compact architecture and is therefore suitable for the use in practical applications such as scientific and military airborne LIDAR and imaging. Based on this system, the amplification performances of the all‐fiber amplifier is investigated. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2546–2549, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23770
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