Title

Nonreciprocity In Waveguide Second Harmonic Generation

Abstract

Second-order nonlinearities have prompted a great deal of interest because of the possibility of generating large non-linear phase shifts as a result of cascaded processes. Realizing that in SHG both the conversion efficiency and the nonlinear phase are important in the process leads to a variety of other phenomena. One of the most important signatures of cascaded processes is that they depend on the spatial distribution of the wave-vector phase mismatch (Δk L). The evolution of the nonlinear process at any point effectively depends on the incident (seeding) fundamental and harmonic fields resulting from propagation up to that point. It is found here that if the wave-vector distribution along the propagation is spatially nonuniform, the SHG exhibits a nonreciprocal behavior, i.e., the SHG response depends on which end of the waveguide is the input end. This response was numerically predicted using the couple mode equations for SHG including the terms involving the spatial variation Δk L.

Publication Date

1-1-1996

Publication Title

Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series

Volume

9

Number of Pages

75-

Document Type

Article

Personal Identifier

scopus

Socpus ID

0029695909 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0029695909

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