Frequency conversion device and process for producing the same.

摘要

The fiber type frequency conversion element of the present invention is composed of a core comprising an organic nonlinear optical material (3) and a clad comprising polymeric organic material (1). The organic nonlinear optical material preferably has a melting point of from 70 to 200 DEG C, and the high polymeric organic material has a melting point which is higher than that of the nonlinear optical material by at least 20 DEG C. <IMAGE>