Title :
Tunable and Switchable Fiber Ring Laser Among Four Wavelengths With Ultranarrow Wavelength Spacing Using a Quadruple-Transmission-Band Fiber Bragg Grating Filter
Author :
Xia, Li ; Shum, P. ; Yan, Min ; Wang, Yixin ; Cheng, Tee Hiang
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
Four pi-phase shifts are introduced in a uniform fiber Bragg grating (FBG) structure to realize a quadruple-transmission-band filter with ultranarrow 40-pm wavelength spacing. Four separate single-wavelength lasings at 1552.60, 1552.63, 1552.67, and 1552.71 nm, and three pairs of dual-wavelength lasings among above four wavelengths, are achieved stably by incorporating the quadruple-transmission-band FBG filter in a fiber ring cavity with a tunable uniform FBG acting as coarse frequency selection. This new kind of laser will be very useful in applications requiring closely spaced and tunable single- or dual-wavelength components
Keywords :
Bragg gratings; fibre lasers; laser cavity resonators; laser stability; laser tuning; optical fibre filters; optical switches; ring lasers; 1552.60 nm; 1552.63 nm; 1552.67 nm; 1552.71 nm; dual-wavelength lasing; fiber Bragg grating filter; fiber ring laser; laser switching; laser tuning; quadruple-transmission-band filter; single-wavelength lasing; wavelength spacing; Bragg gratings; Distributed feedback devices; Erbium-doped fiber lasers; Fiber gratings; Fiber lasers; Filters; Optical fiber devices; Optical fiber polarization; Ring lasers; Tunable circuits and devices; Fiber Bragg grating (FBG); fiber ring laser; quadruple-transmission-band filter; ultranarrow wavelength spacing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.883326
