A　type　of　high　birefringence　dual-core　photonic　crystal　fibers　(DC-PCFs)　with　a　central　row　of　elliptical　air　holes　have　been　proposed.　The　transverse　electric　field　vector　distributions　of　the　two　modes　are　evaluated,　the　birefringence　or　coupling　length　with　the　different　parameters　is　numerically　analyzed　based　on　finite-element　method.　The　numerical　results　show　values　for　the　birefringence　of　8.247　x　10(-3)　(for　wavelength,　lambda　=　1.5　mu　m　and　lattice　length,　Lambda　=　1.3　mu　m),　and　for　the　coupling　lengths　about　3.1　mm　and　2.6　mm　(lambda　=　1.5　mu　m　and　Lambda　=　1.5　mu　m)　to　modes　of　x　and　y　polarized,　respectively.　With　the　increasing　of　the　air-filling　fraction　in　proposed　DC-PCF,　the　coupling　length　becomes　longer　and　the　birefringence　becomes　higher.　(C)　2013　Elsevier　GmbH.　All　rights　reserved.