Title :
Efficient coupling between laser diodes with a highly elliptic field and single-mode fibers by means of GIO fibers
Author :
Ogura, Akira ; Kuchiki, Satoru ; Shiraishi, Kazuo ; Ohta, Kazuyoshi ; Oishi, Isamu
Author_Institution :
Fac. of Eng., Utsunomiya Univ., Japan
Abstract :
A new configuration is proposed for efficient coupling between laser diodes (LDs) with a highly elliptic field and single-mode fibers (SMFs). Graded-index oval-core (GIO) fibers were employed to match the LD and SMF field profiles. Experiments show that the coupling loss between the LD, operating at a wavelength of 980 nm with a field profile aspect ratio of 5.9, and SMF is effectively 0.6 dB. The tolerances for lateral displacements are roughly an order of magnitude larger than those in the conventional wedge-shaped lensed-fiber coupling scheme.
Keywords :
electromagnetic field theory; gradient index optics; lenses; optical fibre couplers; optical fibre losses; semiconductor lasers; 980 nm; GIO fibers; SMF field profiles; fibre coupling loss; field profile aspect ratio; graded-index oval-core fibers; highly elliptic field; laser diodes; lateral displacements; optical fibre coupling; oval-core GRIN fibers; single-mode fibers; wedge-shaped lensed-fiber coupling scheme; Coupling circuits; Diode lasers; Lenses; Optical coupling; Optical devices; Optical fiber applications; Optical fiber devices; Optical fibers; Optical losses; Semiconductor optical amplifiers;
Journal_Title :
Photonics Technology Letters, IEEE
