Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (4): 44205-044205.doi: 10.1088/1674-1056/22/4/044205

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

330-W single-frequency retrievable multi-tone monolithic fiber amplifier

王小林, 周朴, 冷进勇, 杜文博, 许晓军   

  1. College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • 收稿日期:2012-06-30 修回日期:2012-08-22 出版日期:2013-03-01 发布日期:2013-03-01
  • 基金资助:
    Project supported by the New Century Excellent Talents in University, Ministry of Education of China and the Scientific Research Project in National University Defense of Technology.

330-W single-frequency retrievable multi-tone monolithic fiber amplifier

Wang Xiao-Lin (王小林), Zhou Pu (周朴), Leng Jin-Yong (冷进勇), Du Wen-Bo (杜文博), Xu Xiao-Jun (许晓军)   

  1. College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2012-06-30 Revised:2012-08-22 Online:2013-03-01 Published:2013-03-01
  • Contact: Wang Xiao-Lin E-mail:wxllin@nudt.edu.cn
  • Supported by:
    Project supported by the New Century Excellent Talents in University, Ministry of Education of China and the Scientific Research Project in National University Defense of Technology.

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摘要： A single-frequency retrievable phase modulated multi-tone fiber amplifier is presented in theory and demonstrated in experiment. A multi-tone seed laser generated by a sine wave phase modulated single-frequency laser is employed for stimulated Brillouin scattering suppression in all-fiber amplifier. A demodulation signal which is π phase shifted with respect to the modulation signal is used to retrieve the single-frequency laser from the multi-tone laser. In experiment, we first optimize the all-fiber master-oscillator power-amplifier. With this amplifier, we demonstrate a single-frequency retrievable multi-tone laser with 330-W output when driven by the multi-tone seed, while the ultimate output power is only 130 W when driven by the single-frequency laser. Then, we carry out an experiment for retrieving single-frequency laser from the amplified multi-tone laser. Results indicate that the single-frequency laser can be retrieved with a sideband suppression of more than 20 dB. Retrieving an even higher power single-frequency laser is possible if a high power demodulator is available.

关键词: single-frequency laser, multi-tone amplifier, phase modulation and demodulation

Abstract: A single-frequency retrievable phase modulated multi-tone fiber amplifier is presented in theory and demonstrated in experiment. A multi-tone seed laser generated by a sine wave phase modulated single-frequency laser is employed for stimulated Brillouin scattering suppression in all-fiber amplifier. A demodulation signal which is π phase shifted with respect to the modulation signal is used to retrieve the single-frequency laser from the multi-tone laser. In experiment, we first optimize the all-fiber master-oscillator power-amplifier. With this amplifier, we demonstrate a single-frequency retrievable multi-tone laser with 330-W output when driven by the multi-tone seed, while the ultimate output power is only 130 W when driven by the single-frequency laser. Then, we carry out an experiment for retrieving single-frequency laser from the amplified multi-tone laser. Results indicate that the single-frequency laser can be retrieved with a sideband suppression of more than 20 dB. Retrieving an even higher power single-frequency laser is possible if a high power demodulator is available.

Key words: single-frequency laser, multi-tone amplifier, phase modulation and demodulation

中图分类号:  (Fiber lasers)

  • 42.55.Wd
42.60.Da (Resonators, cavities, amplifiers, arrays, and rings) 42.60.Fc (Modulation, tuning, and mode locking)