Title :
Cascaded Two-Wavelength Lasers and Their Effects on C-Band Amplification Performance for Er3+-Doped Fluoride Fiber
Author :
Qin, Guanshi ; Ohishi, Yasutake
Author_Institution :
Future-Ind. Orient Basic Sci. & Mater. Dept., Toyota Technol. Inst., Nagoya
fDate :
4/1/2007 12:00:00 AM
Abstract :
In this paper, we report cascaded two-wavelength 853-nm (4 S3/2rarr4I13/2 transition) and 1533-nm (4I13/2rarr4I15/2 transition) lasing from Er3+-doped fluoride fiber pumped at 974 nm. The cavity for cascaded two-wavelength lasing is composed of two fiber ends with 4% Fresnel reflection. Its optical-to-optical efficiency is up to 26.6%. Its effects on C-band fiber amplifiers and green upconversion fiber lasers are discussed. A new way to get high efficiency and low noise C-band amplifier is suggested, i.e., a fluoride-based Er3+-doped fiber amplifier including 853-nm lasing cavity. Our simulated results show that such a new amplifier can enhance the signal gain greatly and break the limit of the saturated gain intensity for a normal amplifier
Keywords :
erbium; laser cavity resonators; light reflection; optical fibre amplifiers; optical frequency conversion; optical pumping; (ZrF4-BaF2-LaF3-YF3 -AlF3-LiF-NaF-PbF2):Er; 4 to 8 GHz; 853 nm; 974 nm; C-band amplification; C-band fiber amplifiers; Er3+-doped fluoride fiber; Fresnel reflection; cascaded lasers; green upconversion fiber lasers; lasing cavity; low noise C-band amplifier; optical pumping; saturated gain intensity; signal gain enhancement; two-wavelength lasers; two-wavelength lasing; Erbium; Fresnel reflection; Laser excitation; Laser transitions; Low-noise amplifiers; Optical amplifiers; Optical fiber amplifiers; Optical noise; Quantum cascade lasers; Stimulated emission; ${hbox {Er}}^{3+}$; Cascaded lasing; fluoride fiber;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2007.893003
