Title :
Gain and saturation intensity of the green Ho:ZBLAN upconversion fiber amplifier and laser
Author :
Mejia, E.B. ; Senin, A.A. ; Talmadge, J.M. ; Eden, J.G.
Author_Institution :
Centro de Investigacion y en Opt. AC, Leon, Mexico
Abstract :
The gain and saturation intensity of the green Ho-doped fluorozirconate (ZBLAN) glass fiber amplifier and laser, pumped in the red (643 /spl les/ /spl lambda//sub p/ /spl les/ 649 nm; 5F5 /spl larr/ 5I/sub 8/), have been measured. For a 2.4-μm core diameter fiber 45 cm in length, the single-pass gain at 543.4 nm exceeds 12 dB for 90 mW of pump power at 643.5 nm. The saturation power for the 5F4, 5S2 /spl rarr/ 5I/sub 8/ lasing transition was determined from gain measurements to be 970 /spl plusmn/ 175 μW, which corresponds to a saturation intensity of 19.8 /spl plusmn/ 3.5 kW /spl middot/ cm/sup -2/, and a stimulated emission cross section approximately one order of magnitude larger than theoretical estimates.
Keywords :
aluminium compounds; barium compounds; holmium; lanthanum compounds; laser transitions; optical communication equipment; optical fibre amplifiers; optical pumping; optical saturation; sodium compounds; zirconium compounds; 2.4 micron; 45 cm; 543.4 nm; 649 to 643 nm; 90 mW; 970 muW; Ho-doped ZBLAN glass fiber amplifier; Ho-doped fluorozirconate glass fiber amplifier; ZBLAN:Ho; ZrF4-BaF2-LaF3-AlF3-NaF:Ho; core diameter fiber; gain measurements; green Ho:ZBLAN upconversion fiber amplifier; laser gain; lasing transition; pump power; saturation intensity; saturation power; single-pass gain; stimulated emission cross section; Biomedical optical imaging; Fiber lasers; Gain measurement; Glass; Laser theory; Optical attenuators; Optical fiber amplifiers; Optical fiber communication; Pump lasers; Semiconductor optical amplifiers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.803338
