J. Zavadil et al., INFLUENCE OF OPTICAL FIBERS ON THE SPECTRUM OF TRANSMITTED LIGHT-EMITTING-DIODE RADIATION, Applied optics, 34(21), 1995, pp. 4312-4315
Propagation of GaxIn1-xAsyP1-y light-emitting-diode radiation through
an optical fiber was found to affect its spectral curve very strongly,
and the origin of this effect was analyzed. Various kinds of fibers w
ere found to induce interferencelike modulations superimposed on the s
mooth spontaneous spectral curve of the diodes. We were able to show t
hat when a monomode polarization-preserving fiber is used, the modulat
ions are mostly due to intermodal interference.