CLOSED-FORM EXPRESSIONS FOR THE GAIN IN 3-LEVEL AND 4-LEVEL LASER FIBERS

被引:70
作者
DIGONNET, MJF
机构
[1] Edward L. Ginzton Laboratory, W. W. Hansen Laboratories of Physics, Stanford University, Stanford
关键词
D O I
10.1109/3.60903
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Exact and approximate theoretical models of the small-signal single-pass gain in single-mode three-level laser fibers are presented, relevant to the behavior of rare-earth-doped (in particular Er3+) silica-based fibers. These models account for the effects of both the pump and signal-mode structures and pump excited-state absorption (ESA), the latter being present for some pump wavelengths in Erdoped silica fibers. By relying on the modal overlap integral formalism introduced earlier for four-level lasers, relatively simple closed-form expressions for the pump absorption and the gain are derived. These expressions are also applicable to four-level laser fibers by a simple adjustment of some of the model parameters.
引用
收藏
页码:1788 / 1796
页数:9
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