DocumentCode
760468
Title
Long-working-distance expanded-beam fibre microlenses
Author
Stone, J. ; Burrus, C.A. ; Centanni, J.C.
Author_Institution
AT&T Bell Labs., Crawford Hill Lab., Holmdel, NJ, USA
Volume
27
Issue
7
fYear
1991
fDate
3/28/1991 12:00:00 AM
Firstpage
592
Lastpage
593
Abstract
Single-mode-fibre output couplers for diode lasers have been fabricated to have long working distances. The fibres have (i) tapered cores expanded at one end to 25 mu m diameter by thermal diffusion of the core dopant and (ii) outside diameters etched down to 30-60 mu m. Hemispherical lenses were made by melting the ends. The resulting working distances are 35-40 mu m, and coupling losses, as low as 3 dB, are mostly between 3.5 and 5.5 dB.
Keywords
laser accessories; lenses; optical couplers; optical fibres; semiconductor junction lasers; 25 to 60 micron; 3.5 to 5.5 dB; core dopant; coupling losses; diode lasers; fibre microlenses; hemispherical lenses; long working distances; melting; single-mode-fibre output couplers; tapered cores; thermal diffusion;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19910373
Filename
100855
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