Temperature tunable multiwavelength fiber laser by using compounded filter

Chen Jiao; Tong Zhengrong; Zhang Weihua; Xue Lifang

doi:10.3788/IRLA201847.0105001

A stable multiwavelength erbium-doped fiber laser was proposed and experimentally demonstrated by using a compounded fiber filter, which was composed of a Mach-Zehnder interferometer(MZI) and a birefringence fiber filter-Lyot filter. The MZI was fabricated by using the fiber fusion splicer to splice a section of SMF to form two cascaded spherical structures. The Lyot filter was incorporating a segment of polarization maintaining fiber(PMF) and two polarization controllers(PCs), which provided nonlinear polarization rotation(NPR) and birefringent filter effect to suppress the mode competition and generate multiwavelength. Using cascaded spherical-shape structures MZI and the Lyot filter as mode restricting elements respectively, the transmission spectrum of cascaded spherical-shape structures MZI was modulated by the Lyot filter, which determined the period of the compounded structure. In the experiments, 9-wavelength operation with a side-mode suppression ratio (SMSR) of~40 dB was achieved, and the space of wavelength was 0.68 nm defined by the Lyot filter. When the stability of proposed structure was observed for 2 hours every 10 minutes, the fluctuation of the central wavelength's output power was less than 0.67 dB. Furthermore, when the two spherical-shape structures MZI was fixed on a furnace and the temperature varied from 30℃ to 110℃, the spectrum of output wavelength can be tuned within the range of 6.69 nm.

Temperature tunable multiwavelength fiber laser by using compounded filter

1. Key Laboratory of Film Electronic and Communication Devices,School of Electrical and Electronic Engineering,Tianjin University of Technology,Tianjin 300384,China

Received Date: 2017-06-05

Rev Recd Date: 2017-08-03

Publish Date: 2018-01-25

Key words:

Abstract: A stable multiwavelength erbium-doped fiber laser was proposed and experimentally demonstrated by using a compounded fiber filter, which was composed of a Mach-Zehnder interferometer(MZI) and a birefringence fiber filter-Lyot filter. The MZI was fabricated by using the fiber fusion splicer to splice a section of SMF to form two cascaded spherical structures. The Lyot filter was incorporating a segment of polarization maintaining fiber(PMF) and two polarization controllers(PCs), which provided nonlinear polarization rotation(NPR) and birefringent filter effect to suppress the mode competition and generate multiwavelength. Using cascaded spherical-shape structures MZI and the Lyot filter as mode restricting elements respectively, the transmission spectrum of cascaded spherical-shape structures MZI was modulated by the Lyot filter, which determined the period of the compounded structure. In the experiments, 9-wavelength operation with a side-mode suppression ratio (SMSR) of~40 dB was achieved, and the space of wavelength was 0.68 nm defined by the Lyot filter. When the stability of proposed structure was observed for 2 hours every 10 minutes, the fluctuation of the central wavelength's output power was less than 0.67 dB. Furthermore, when the two spherical-shape structures MZI was fixed on a furnace and the temperature varied from 30℃ to 110℃, the spectrum of output wavelength can be tuned within the range of 6.69 nm.

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Reference (15)

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Temperature tunable multiwavelength fiber laser by using compounded filter

doi: 10.3788/IRLA201847.0105001

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