Applied Physics Letters
Optical wave guides, Quantum optics, Lasers
It has generally been accepted that accurate results may be obtained using the scalar‐wave approach to solve problems dealing with inhomogeneous multimode guided‐wave structures. The problem of the applicability of the scalar‐wave approach to obtain wave propagation characteristics in single‐mode fiber or integrated optical circuit guides with inhomogeneous index profiles is examined in this paper. It is shown that if certain limiting conditions are satisfied, the scalar‐wave approach will yield valid results for single‐mode structures. These limiting conditions are usually satisfied by many practical single‐mode inhomogeneous fibers or IOC structures.
Casperson, L. W., Yeh, C., Brown, W. P. (1979). Scalar‐wave approach for single‐mode inhomogeneous fiber problems. Applied Physics Letters, 34 (7), 460-462.