Title :
A fiber lens with a long working distance for integrated coupling between laser diodes and single-mode fibers
Author :
Shiraishi, Kazuo ; Oyama, Naoto ; Matsumura, Kazuhito ; Ohishi, Isamu ; Suga, Shigeru
Author_Institution :
Fac. of Eng., Utsunomiya Univ., Japan
fDate :
8/1/1995 12:00:00 AM
Abstract :
A new scheme is proposed for lensed fibers with a long working distance, as used in the coupling between laser diodes and single-mode fibers. The scheme consists of the combination of a hemispherically-ended coreless-fiber tip and an expanded-core fiber. The working distance is measured as 169 μm with a relatively low coupling-loss of 4.2 dB at a wavelength of 1.49 μm. Tolerances for a 1-dB loss increment for axial-, lateral-, and angular-misalignment are 35, 2.6 μm, and 0.8 degrees, respectively. The new configuration is suitable for alignment-free coupling between arrayed laser diodes and an array of single-mode fibers
Keywords :
lenses; optical fibre couplers; optical fibre losses; optical fibre subscriber loops; semiconductor lasers; 1.49 mum; 160 mum; 4.2 dB; alignment-free coupling; angular-misalignment; arrayed laser diodes; axial-misalignment; expanded-core fiber; fiber lens; hemispherically-ended coreless-fiber tip; integrated coupling; laser diodes; lateral-misalignment; long working distance; loss increment; low coupling-loss; single-mode fiber array; single-mode fiber coupling; Diode lasers; Lenses; Optical arrays; Optical coupling; Optical feedback; Optical fiber subscriber loops; Optical losses; Reproducibility of results; Semiconductor laser arrays; Wavelength measurement;
Journal_Title :
Lightwave Technology, Journal of
