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Proceedings Paper

An ultra-narrow linewidth multiwavelength fiber laser without linear gain
Author(s): Qingsong Jia; Tianshu Wang; Peng Zhang; Xin Liu; Shoufeng Tong; Mei Kong; Huilin Jiang
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Paper Abstract

An ultra-narrow linewidth multiwavelength Brillouin fiber laser is demonstrated. Erbium-doped fiber amplifier with linear gain is not used in the structure to avoid the signal broaden. Multiwavelength output with identical interval and ultra-narrow linewidth will be obtained through the experiment. Because the whole system works with a simple structure, it can work stably and has a good application performance in the future. A one-way feedback multiwavelength Brillouin fiber laser structure has been designed. A 2x2 3dB coupler, a 8 km-long single-mode fiber (SMF), a distributed feedback(DFB) semiconductor laser and two optical circulators are included in the structure. A segment of 8 km-long single-mode fiber (SMF) between the two ports of a 2x2 3 dB coupler is used as Brillouin gain loop. A distributed feedback semiconductor laser works as the Brillouin pump (BP). Laser output and feedback are realized by two optical circulators. We adopt the Brillouin pump power at 80 mW. Seven Stokes signals can be observed excluding BP. The Brillouin frequency shift is 0.088 nm compares with the wavelength of BP. We have measured multiwavelength Brillouin fiber laser spectrum ten times in 50 minutes. The experiment result shows that the multiwavelength output of Brillouin fiber laser is very stable. The 3 dB linewidth of the output laser is 5 kHz measured by the frequency spectrum analyzer.

Paper Details

Date Published: 21 August 2013
PDF: 6 pages
Proc. SPIE 8906, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems, 890618 (21 August 2013); doi: 10.1117/12.2033156
Show Author Affiliations
Qingsong Jia, Changchun Univ. of Science and Technology (China)
Tianshu Wang, Changchun Univ. of Science and Technology (China)
Peng Zhang, Changchun Univ. of Science and Technology (China)
Xin Liu, Changchun Univ. of Science and Technology (China)
Shoufeng Tong, Changchun Univ. of Science and Technology (China)
Mei Kong, Changchun Univ. of Science and Technology (China)
Huilin Jiang, Changchun Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 8906:
International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems
Keith E. Wilson; Jing Ma; Liren Liu; Huilin Jiang; Xizheng Ke, Editor(s)

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