Title :
Multiwavelength Raman fiber-ring laser based on tunable cascaded long-period fiber gratings
Author :
Han, Young-Geun ; Kim, Chang-Seok ; Kang, Jin U. ; Paek, Un-Chul ; Chung, Youngjoo
Author_Institution :
Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA
fDate :
3/1/2003 12:00:00 AM
Abstract :
Multiwavelength Raman fiber lasers using intracavity tunable cascaded long-period fiber gratings (LPFGs) are 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.
Keywords :
Raman lasers; channel spacing; diffraction gratings; fibre lasers; laser tuning; optical fibre filters; optical transmitters; ring lasers; wavelength division multiplexing; grating length; intracavity tunable cascaded LPFG; multichannel fiber filter; multiple-wavelength generation; multiwavelength Raman fiber-ring laser; multiwavelength fiber-ring lasers; number of gratings; physical parameters; separation distance; tunable cascaded long-period fiber gratings; wavelength-division-multiplexing channels; Bandwidth; Erbium-doped fiber lasers; Fiber gratings; Fiber lasers; Filters; Laser feedback; Laser theory; Quantum cascade lasers; Tunable circuits and devices; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.807923
