DocumentCode :
1080138
Title :
Characteristics of a hemispherical microlens for coupling between a semiconductor laser and single-mode fiber
Author :
Yamada, Jun-Ichi ; Murakami, Yasuji ; Sakai, Jun-ichi ; Kimura, Tatsuya
Author_Institution :
NTT Public Corp., Musashino-shi, Tokyo, Japan
Volume :
16
Issue :
10
fYear :
1980
fDate :
10/1/1980 12:00:00 AM
Firstpage :
1067
Lastpage :
1072
Abstract :
A hemispherical microlens is fabricated on the end of a single-mode fiber by an electric arc discharge technique. It improves coupling efficiency between InGaAsP lasers with buried heterostructure geometry and single-mode fiber. The lowest coupling loss of 2.9 dB is achieved with the optimum lens radius of 8.5 μm. This loss is 4.4 dB lower than that with a butt joint. Experimental results of coupling efficiency and alignment tolerances in coupling with different lens radii in the range of 
m are discussed in detail. The results are in good agreement with theoretical values derived by Gaussian beam and paraxial ray approximations.
m are discussed in detail. The results are in good agreement with theoretical values derived by Gaussian beam and paraxial ray approximations.Keywords :
Gallium materials/lasers; Laser couplers; Lenses; Optical fiber coupling; Fiber lasers; Laser beams; Lenses; Microoptics; Optical coupling; Optical fiber losses; Optical fibers; Repeaters; Semiconductor lasers; Silicon compounds;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/JQE.1980.1070355
Filename :
1070355
Link To Document :
