1 January 2005 Spacing-tunable multiwavelength fiber laser source using a Sagnac loop filter
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Optical Engineering, 44(1), 014202 (2005). doi:10.1117/1.1828473
A novel spacing-tunable multiwavelength erbium-doped fiber laser source based on a Sagnac loop filter is proposed and experimentally demonstrated. The filter, which is coupled together with the laser cavity, consists of a normal 3-dB fiber coupler, a polarization controller (PC1), and a segment of high-birefringence (Hi-Bi) fiber. The active gain medium, which is a polarization-maintaining erbium-doped fiber (PM-EDF) with an elliptical core, leads to possible multifrequency lasing output at room temperature. In the experiment, by changing the setting of the polarization controller (PC2), multiple-frequency lasing lines with different wavelength spacing are obtained. Experimental results show several stable output lasing wavelengths with high extinction ratios at room temperature.
Nam Quoc Ngo, Duan Liu, Xinyong Dong, Le Nguyen Binh, Swee Chuan Tjin, Song Yang Li, "Spacing-tunable multiwavelength fiber laser source using a Sagnac loop filter," Optical Engineering 44(1), 014202 (1 January 2005). https://doi.org/10.1117/1.1828473

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