Title :
Numerical analysis of eigenmodes and splice losses of thermally diffused expanded core fibers
Author :
Ohtera, Yasuo ; Hanaizumi, Osamu ; Kawakami, Shojiro
Author_Institution :
Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan
fDate :
12/1/1999 12:00:00 AM
Abstract :
Field distributions and far-field patterns (FFP´s) of the eigenmodes of thermally diffused expanded core (TEC) fibers are clarified by numerical analysis. The spot size of the TEC fiber is estimated by using the FFP that can be measured more easily than the near-field pattern (NFP). Splice losses of two TEC fibers are analyzed numerically considering a single or composite effect of gap, offset, and tilt. The results are useful for estimating isolations of fiber-integrated optical isolators and insertion losses of other fiber-integrated type optical devices. Splice losses considering multiple reflection between two endfaces of the TEC fibers with gaps are also analyzed numerically. This is useful for the design of fiber-integrated tunable wavelength filters
Keywords :
eigenvalues and eigenfunctions; integrated optics; optical design techniques; optical fibre fabrication; optical fibre filters; optical fibre losses; optical fibre theory; optical isolators; optical tuning; TEC fiber; eigenmodes; endfaces; fiber-integrated optical isolators; fiber-integrated tunable wavelength filter design; fiber-integrated type optical devices; field distributions; multiple reflection; near-field pattern; numerical analysis; splice losses; thermally diffused expanded core fibers; Insertion loss; Isolators; Numerical analysis; Optical devices; Optical fiber devices; Optical fiber losses; Optical filters; Optical reflection; Size measurement; Thermal expansion;
Journal_Title :
Lightwave Technology, Journal of
