@article{Main2019c, author = {Philip B. Main and Peter J. Mosley and Andrey V. Gorbach}, doi = {10.1103/PhysRevA.100.053815}, issn = {2469-9926}, issue = {5}, journal = {Physical Review A}, month = {11}, pages = {053815}, publisher = {American Physical Society}, title = {Spontaneous parametric down-conversion in asymmetric couplers: Photon purity enhancement and intrinsic spectral filtering}, volume = {100}, url = {https://link.aps.org/doi/10.1103/PhysRevA.100.053815}, year = {2019} }