Acta Optica Sinica, Volume. 8, Issue 4, 379(1988)
Coupling between two doubly cladding single mode fibers
An accurate analytic expression of coupling coefficient between two parallel doubly cladding single mode fibers is given in this paper.The coupling coefficients as a function of normalized frequency parameter V are calculated for fibers with raised, matched, and depressed inner cladding indices. The coupling coefficients as a function of normalized distance D/a are also given with different V. The formula can be used to compute both the coupling coefficients for both x-polarized modes and the coupling of y-polarized modes further. It can also be used to analyze ilie coupling beliweeri two fibers with their large refractive-index difference, as well as polarisation obaraoterlstioe of optical fiber couplers.
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CHEN ZHIHAO, YAO HUIHAI. Coupling between two doubly cladding single mode fibers[J]. Acta Optica Sinica, 1988, 8(4): 379