Title :
Characterization of 1050-nm Pumped S-Band TDFA With Different Dopant Concentrations by Coherent Optical Frequency-Domain Reflectometry
Author :
Shalibeik, Hotan ; Behrends, Arne ; Kozak, Marcin M. ; Kowalsky, Wolfgang ; Caspary, Reinhard
Author_Institution :
Inst. of High Frequency Technol., Technische Univ. Braunschweig
Abstract :
For thulium-doped fiber amplifier (TDFA) design, knowledge of the gain distribution within the active fiber is of great value. For the first time, the distributed gain along highly thulium-doped fibers was measured with high-resolution reflectometry. The technique of coherent optical frequency-domain reflectometry is a nondestructive and noninvasive method well matched to this task due to its dynamic range, spatial resolution, and measurement range. Using thulium-doped fibers with different Tm3+-dopant concentrations, we show precise measurements of Rayleigh backscattering levels for obtaining the optimum gain-length ratio for S-band TDFA pumped by 1050-nm laser diodes
Keywords :
Rayleigh scattering; backscatter; impurity distribution; light coherence; nondestructive testing; optical fibre amplifiers; optical fibre testing; optical pumping; reflectometry; thulium; 1050 nm; 2 to 4 GHz; Rayleigh backscattering; S-band fiber amplifier; coherent optical frequency-domain reflectometry; dopant concentrations; gain distribution; gain-length ratio; high-resolution reflectometry; laser diodes; nondestructive method; noninvasive method; optical pumping; thulium-doped fiber amplifier; thulium-doped fibers; Distributed amplifiers; Dynamic range; Frequency measurement; Gain measurement; Optical fiber amplifiers; Optical pumping; Reflectometry; Spatial resolution; Stimulated emission; Time measurement; Fluoride fiber; nondestructive testing; optical fiber amplifiers; optical fiber measurements; optical frequency- domain reflectometry (OFDR); thulium-doped fiber amplifier (TDFA);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.890041
