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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 9, Iss. 4 — Apr. 10, 2011
  • pp: 041404–

Phase noise measurement of high-power fiber amplifiers

Hu Xiao, Xiaolin Wang, Yanxing Ma, Bing He, Pu Zhou, Jun Zhou, and Xiaojun Xu  »View Author Affiliations

Chinese Optics Letters, Vol. 9, Issue 4, pp. 041404- (2011)

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We measure the phase fluctuation in a high-power fiber amplifier using a multi-dithering technique. Its fluctuation property is qualitatively analyzed by the power spectral density and integrated spectral density. Low frequency fluctuations caused by the environment are dominant in the phase fluctuations in an amplifier, whereas the high frequency components related to laser power affect the control bandwidth. The bandwidth requirement of the active phase-locking is calculated to be 300 Hz, 670 Hz, 1.6 kHz, and 3.9 kHz under the output power of 25, 55, 125, and 180 W, respectively. The approximately linear relationship between the control bandwidth and laser power needs to be further investigated.

© 2011 Chinese Optics Letters

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.3290) Lasers and laser optics : Laser arrays
(140.3510) Lasers and laser optics : Lasers, fiber

Hu Xiao, Xiaolin Wang, Yanxing Ma, Bing He, Pu Zhou, Jun Zhou, and Xiaojun Xu, "Phase noise measurement of high-power fiber amplifiers," Chin. Opt. Lett. 9, 041404- (2011)

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