Abstract

An efficient coupling from semiconductor lasers in the 1.3-μm range into single-mode fibers with tapered hemispherical ends (TH fiber) is described. Coupling efficiency of more than 35% is attainable with TH fiber coupling. Optimum radius of the end hemisphere is ∼20 μm and is obtained with good reproducibility by drawing the fiber in an arc discharge. It was found that changes in laser characteristics due to reflected light are far less for TH fiber coupling than for flat-end coupling. Stable coupling modules using TH fiber coupling were fabricated for system use.

© 1980 Optical Society of America

Reflected light in the coupling of semiconductor lasers with tapered hemispherical end fibers

Hideo Kuwahara, Yoshihito Onoda, Masami Goto, and Takakiyo Nakagami
Appl. Opt. 22(17) 2732-2738 (1983)

Launching light from semiconductor lasers into multimode optical fibers having hemispherical ends and taper-with-hemisphere ends

Harish R. D. Sunak and Marlete A. ZamprÔnio
Appl. Opt. 22(15) 2344-2348 (1983)

Comparison of efficiency and feedback characteristics of techniques for coupling semiconductor lasers to single-mode fiber

G. Wenke and Y. Zhu
Appl. Opt. 22(23) 3837-3844 (1983)

Semiconductor laser to single-mode fiber coupler

Masatoshi Saruwatari and Kiyoshi Nawata
Appl. Opt. 18(11) 1847-1856 (1979)

Efficient highly stable laser diode module for single-mode fiber employing a combination of hemispherical ended GRIN rod lens and virtual fiber

Kenji Kawano, Osamu Mitomi, Mitsuaki Yanagibashi, and Toshinori Nozawa
Appl. Opt. 28(11) 2012-2016 (1989)