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1. WO2008020938 - NONLINEAR OPTICAL DEVICE AND METHOD OF FORMING

Publication Number WO/2008/020938
Publication Date 21.02.2008
International Application No. PCT/US2007/015881
International Filing Date 11.07.2007
IPC
G02F 1/355 2006.01
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
35Non-linear optics
355characterised by the materials used
G02F 1/377 2006.01
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
35Non-linear optics
37for second-harmonic generation
377in an optical waveguide structure
CPC
G02F 1/3558
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
35Non-linear optics
355characterised by the materials used
3558Poled materials, e.g. with periodic poling; Fabrication of domain inverted structures, e.g. for quasi-phase-matching [QPM]
G02F 1/3775
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
35Non-linear optics
37for second-harmonic generation
377in an optical waveguide structure
3775with a periodic structure, e.g. domain inversion, for quasi-phase-matching [QPM]
Applicants
  • PATEL, Navin Bhailalbhai [GB]/[US]
Inventors
  • PATEL, Navin Bhailalbhai
Agents
  • RANDALL, David A.
Priority Data
11/505,24316.08.2006US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) NONLINEAR OPTICAL DEVICE AND METHOD OF FORMING
(FR) DISPOSITIF OPTIQUE NON LINÉAIRE ET PROCÉDÉ DE FORMATION DE CELUI-CI
Abstract
(EN)
A nonlinear optical device including at least a first nonlinear optical grating is provided. The first grating comprises a plurality of adjacent nonlinear optical (NLO) units. Each NLO unit has a single crystal segment and a polycrystalline segment. The single crystal segment is formed from a single crystal of a nonlinear optical material and has a length adapted to provide a nonlinear optical effect. The polycrystalline segment has a length adapted to compensate for phase mismatch that occurs in the single crystal segment. Including a polycrystalline segment in each NLO unit allows for a type of quasi-phase-matching to be achieved in the first nonlinear optical grating. The first grating may be used to form a variety of nonlinear optical devices, including, for example, frequency doublers, frequency adders, frequency subtractors, amplifiers, parametric oscillators, and optical mixers. Further, the first grating may form the core of a waveguide.
(FR)
L'invention concerne un dispositif optique non linéaire comprenant au moins un premier réseau optique non linéaire. Le premier réseau comprend une pluralité d'unités optiques non linéaires (NLO) adjacentes. Chaque unité NLO a un segment monocristallin et un segment polycristallin. Le segment monocristallin est formé à partir d'un monocristal d'un matériau optique non linéaire et possède une longueur adaptée pour fournir un effet optique non linéaire. Le segment polycristallin a une longueur adaptée pour compenser un mésappariement de phase qui se produit dans le segment monocristallin. Le fait d'inclure un segment polycristallin dans chaque unité NLO permet à un type de quasi-appariement de phase d'être obtenu dans le premier réseau optique non linéaire. Le premier réseau peut être utilisé pour former une diversité de dispositifs optiques non linéaires, comprenant, par exemple, des doubleurs de fréquence, des additionneurs de fréquence, des soustracteurs de fréquence, des amplificateurs, des oscillateurs paramétriques et des mélangeurs optiques. En outre, le premier réseau peut former le noyau d'un guide d'ondes.
Also published as
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