http://dx.doi.org/10.1364/OL.36.002170 (Publisher version)
Johnson, P. J. M., Prokhorenko, V., & Miller, R. J. D. (2011). Enhanced bandwidth noncollinear optical parametric amplification with a narrowband anamorphic pump. Optics Letters, 36(11), 2170-2172. doi:10.1364/OL.36.002170.