METHOD FOR MANUFACTURING WAVELENGTH CONVERTING ELEMENT

• Main Authors: KUROTAKE HIROYUKI, SUGITA TOMOYA, MIZUUCHI KIMINORI, TAKAHASHI KEIICHI
• Format: Patent
• Language: English
• Published: 19.01.2006
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To provide a method for manufacturing a wavelength converting element having a large light wavelength conversion efficiency and low transmission loss of light, with high accuracy so as to control a periodically polarization-inversion structure for stably manufacturing a wavelength converting element having a periodical polling inversion structure in an optical waveguide. SOLUTION: In a step of forming an interdigital electrode 25 comprising periodical strip electrodes 23 and a common electrode 24 on a first surface 22 of a ferroelectric substrate in a single domain, having the first surface 22 and a second surface 27 facing each other, the pattern of the interdigital electrode 25 is formed and is further subjected to overetching to produce level difference on the surface of the ferroelectric substrate 21 and an insulating thin film 26 is formed on the first surface 22. Then an electric field is applied between the interdigital electrode 25 and a counter electrode 28 to form a periodically polarization-inverted region 29. Thus, a SHG (second harmonic generation) device with high conversion efficiency can be realized. COPYRIGHT: (C)2006,JPO&NCIPI