Title :
A quasi-single mode optical fiber for long-haul transmission in severe bending environments
Author :
Kamikawa, Neil ; Chang, Ching-Ten
Author_Institution :
Res. Dev., Naval Command Control & Ocean Surveillance Center, Pearl Harbor, HI, USA
fDate :
3/1/1994 12:00:00 AM
Abstract :
We investigated the feasibility of a quasi-single mode optical fiber for low bending losses in long-haul transmission at 1550 nm. The advantage of a quasi-single mode fiber is that for comparable bending losses the relative index difference, /spl Delta/, can be smaller than the /spl Delta/ in a single-mode fiber. We demonstrated that a quasi-single mode fiber with /spl Delta/=0.72% and single-mode cutoff wavelength /spl lambda//sub c/ equal to 1630 mn exhibits bending losses as low as the losses in a single-mode fiber with P=0.93% and /spl lambda//sub c/=1259 nm. Modal noise and modal dispersion effects in the quasi-single mode fiber also were tested and found to be minimal. This letter describes the matched-clad, quasi-single mode fiber and presents the test results.<>
Keywords :
bending; optical dispersion; optical fibres; optical links; optical losses; random noise; refractive index; 1259 nm; 1550 nm; 1630 nm; bending losses; long-haul transmission; low bending losses; matched-clad; modal dispersion effects; modal noise; quasi-single mode fiber; quasi-single mode optical fiber; relative index difference; severe bending environments; single-mode cutoff wavelength; single-mode fiber; Attenuation; Loss measurement; Optical attenuators; Optical fiber dispersion; Optical fiber losses; Optical fiber testing; Optical fibers; Phase measurement; Propagation losses; Sea measurements;
Journal_Title :
Photonics Technology Letters, IEEE
