Acta Optica Sinica, Volume. 31, Issue 2, 214003(2011)
L-Band Variable Wavelength Erbium-Doped Fiber Laser Based on Over-Coupler
The principles and characteristics of a novel fiber loop mirror (FLM), which is composed of polarization controller (PC) and an over-coupler whose coupling ratio is sensitive to wavelength are investigated. The notch depths and positions of loops′ reflection spectrum can be changed by adjusting the PC in the loops. The linear cavity of the L-band variable wavelength fiber laser consists of high-birefringence fiber loops and the over-coupler fiber loops. The reflectivity of various wavelengthes and the laser gain are controlled by changing the states of the polarization controllers in the cavity. In the experiment, the stable output wavelength can be changed from 1564 nm to 1592 nm, over 28 nm tuning range. Within this range, the 3 dB line-width is less than 0.2 nm and the side mode suppression ratio (SMSR) is more than 40 dB.
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Yang Yang, Qiao Xueguang, Liu Yinggang, Zhou Rui, Zhang Jinghua, Zhang Jing. L-Band Variable Wavelength Erbium-Doped Fiber Laser Based on Over-Coupler[J]. Acta Optica Sinica, 2011, 31(2): 214003
Category: Lasers and Laser Optics
Received: Jun. 25, 2010
Accepted: --
Published Online: Jan. 17, 2011
The Author Email: Yang Yang (yang2004114@126.com)