Title :
Dispersion-shifted dual-shape core fibers. Optimization based on spot size definitions
Author :
Tewari, Ramanand ; Pal, Bishnu P. ; Das, U.K.
Author_Institution :
Dept. of Phys., Indian Inst. of Technol., New Delhi, India
fDate :
1/1/1992 12:00:00 AM
Abstract :
Design features, for very low bend and splice losses, in dispersion-shifted dual-shape core (DSC) single-mode fibers are obtained in terms of characteristic mode spot sizes W¯ responsible for splice loss, and W∞ responsible for bend loss. Dual-shape core fiber designs are given with W¯∞/W lying between 1.16 and 1.33 while maintaining the mode spot size between 4 and 5 μm at the operating wavelength of 1550 nm. With this design goal it is shown that bending loss would be lower in a step-index than in a graded-index DSC fiber. Further, conventional single clad step-index or triangular-index dispersion-shifted fibers are seen to have higher bending loss than well-designed DSC fibers
Keywords :
bending; gradient index optics; optical design techniques; optical dispersion; optical fibres; optical losses; optical waveguide theory; 1550 nm; GRIN fibres; bend loss; characteristic mode spot sizes; dispersion-shifted; dual-shape core fibers; fiber designs; graded-index; low bend; operating wavelength; optimisation; single clad; single-mode fibers; splice losses; spot size definitions; step-index; triangular-index; Chirp modulation; Collaborative work; Design optimization; Diode lasers; Electromagnetic waveguides; Fiber lasers; Gaussian distribution; NIST; Physics; Silicon compounds;
Journal_Title :
Lightwave Technology, Journal of
