DocumentCode
1243433
Title
Highly efficient Er-doped fibre amplifiers pumped in 660 nm band
Author
Horiguchi, M. ; Shimizu, M. ; Yamada, M. ; Yoshino, K. ; Hanafusa, H.
Author_Institution
NTT Opto-electron. Labs., Ibaraki, Japan
Volume
27
Issue
25
fYear
1991
Firstpage
2319
Lastpage
2320
Abstract
High gain coefficient in an erbium-doped fibre amplifier, 3.8 dB/mW at 1.536 mu m and 2.3 dB/mW at 1.552 mu m, is achieved for a pump wavelength of 664 nm by using an erbium-doped fibre with a high numerical aperture of 0.285 and thermally-diffused expanded core fibre ends. The gain at 1.536 mu m reaches 30 and 35 dB for launched pump powers of 10 and 15 mW, respectively.
Keywords
erbium; fibre lasers; optical pumping; 1.536 micron; 1.552 micron; 10 to 15 mW; 30 to 36 dB; 664 nm; fibre amplifier; gain; gain coefficient; numerical aperture; pump powers; pump wavelength; thermally-diffused expanded core fibre ends;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19911436
Filename
121336
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