Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 15, Issue 3, Pages 383-385Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2002.807923
Keywords
erbium-doped fiber (EDF) laser; fiber gratings; multichannel filters; multiwavelength fiber laser; Raman fiber laser
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Multiwavelength Raman fiber lasers using intra-cavity tunable cascaded long-period fiber gratings (LPFGs) will be discussed. The application of the cascaded LPFGs as a multichannel fiber filter for the multiple-wavelength generation is proposed and experimentally demonstrated. The characteristics of multiwavelength fiber-ring lasers can be controlled by changing the physical parameters of cascaded LPFGs such as the separation distance between the gratings, grating length, and number of gratings. The multiwavelength Raman fiber-ring laser with nine wavelength-division-multiplexing channels with 100-GHz spacing and 19 channels with 50-GHz spacing has been achieved by varying the physical parameters of cascaded LPFGs.
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