DE20220656U1 - Electro-optical crystal element for an electro-optical modulator has entry and exit surface planes for light beams and electrode surface planes to create an electric field - Google Patents
Electro-optical crystal element for an electro-optical modulator has entry and exit surface planes for light beams and electrode surface planes to create an electric field Download PDFInfo
- Publication number
- DE20220656U1 DE20220656U1 DE20220656U DE20220656U DE20220656U1 DE 20220656 U1 DE20220656 U1 DE 20220656U1 DE 20220656 U DE20220656 U DE 20220656U DE 20220656 U DE20220656 U DE 20220656U DE 20220656 U1 DE20220656 U1 DE 20220656U1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices 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
- G02F1/01—Devices 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 for the control of the intensity, phase, polarisation or colour
- G02F1/03—Devices 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 for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/0305—Constructional arrangements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices 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
- G02F1/01—Devices 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 for the control of the intensity, phase, polarisation or colour
- G02F1/03—Devices 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 for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/0305—Constructional arrangements
- G02F1/0316—Electrodes
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2202/00—Materials and properties
- G02F2202/09—Materials and properties inorganic glass
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
Description
Die Erfindung betrifft ein gattungsgemäßes elektrooptisches Element gemäß dem Oberbegriff des Hauptanspruchs zwecks Einbau in einen elektooptischen Modulator (EOM).The invention relates to a generic electro-optical Element according to the preamble of Main claim for the purpose of installation in an electro-optical modulator (EOM).
Solche Elemente sind bekannt. Nachdem alle Kristalle der elektrooptischen Elemente piezoelektrische Wirkungen aufweisen, zeigen bei periodischen Änderungen des angelegten elektrischen Feldes die Elemente mechanische Dehnungen bei Eigenfrequenzen -sogenannte Piezoresonanzen- die dazu führen können, daß die elastische Dehnung überhöht werden kann, ganz abgesehen davon, daß diese Überdehnungen eine zusätzliche Änderung der optischen Dichte bewirken und bei der Übertragung des elektrischen Ansteuersignals der Phase des Lichtstrahls überlagert sind.Such elements are known. After all Crystals of electro-optical elements piezoelectric effects exhibit periodic changes in the applied electrical Field the elements mechanical expansions at natural frequencies - so-called Piezo resonances - which lead to it can, that the elastic stretch can be increased can, quite apart from the fact that these overstretched an additional change cause the optical density and in the transmission of the electrical Control signal of the phase of the light beam are superimposed.
Der Erfindung liegt die Aufgabe zugrunde, diese resonanten Überhöhungen zu reduzieren.The invention is based on the object resonant peaks too to reduce.
Diese Aufgabe wird bei einem gattungsgemäßen elektrooptischen Element gemäß dem Oberbegriff des Hauptanspruchs erfindungsgemäß durch dessen kennzeichnende Merkmale namlich dadurch gelöst, daß die Grundebene und/oder die Deckebene und/oder zumindest eine der Elektrodenebenen mit einer Schicht aus einem amorphen Werkstoff versehen ist.This task is carried out in a generic electro-optical Element according to the generic term of the main claim according to the invention by its characterizing Features resolved by name, that the Base level and / or the top level and / or at least one of the electrode levels is provided with a layer of an amorphous material.
Durch die zumindest eine Schicht werden in überraschend einfacher Weise mit Vorteil die resonanten Überhöhungen auf allereinfachste Art und Weise reduziert. Hierbei kann entweder die Grundebene und/oder die Deckebene und/oder zumindest eine der Elektrodenebenen mit einer Schicht aus einem amorphen Werkstoff versehen sein, was nach nicht gesicherter Erkenntnis darauf zurückzuführen sein könnte, daß die Schicht(en) als Schallabsorber oder diffuser Reflektor(en) wirkt bzw. wirken. Nachdem die Schicht aus einem amorphen Werkstoff besteht, werden Schallwellen gebrochen, absorbiert und/oder mit der Wirkung gestreut, daß Resonanzen nicht mehr entstehen.Through the at least one layer be in surprising simply with advantage the resonant peaks in the simplest Way reduced. Either the basic level and / or the top level and / or at least one of the electrode levels with a Layer of an amorphous material, which after not assured knowledge could be due to the fact that the layer (s) as sound absorber or diffuse reflector (s) works. After the layer is out an amorphous material, sound waves are broken, absorbed and / or scattered with the effect that resonances no longer arise.
Wenn in zweckmäßiger Ausgestaltung eine Keramik ausgewählt ist, deren Schallimpedanz an das elektrooptische Element angepasst ist, so ergibt sich als zusätzlicher Vorteil eine weitere Reduktion der Überhöhung.If in a practical embodiment a ceramic selected is whose acoustic impedance is matched to the electro-optical element is, there is an additional Advantage of a further reduction of the cant.
Wenn nach Lehre der Erfindung entweder das als Sinterschicht ausgebildete Plättchen mittels eines Lotes auf die Grundebene und/oder die Deckebene aufgelötet oder aber das als Keramikschicht ausgebildete Plättchen mittels eines Klebers auf die Grundebene und/oder die Deckebene aufgeklebt ist, so ergibt sich der weitere Vorteil, daß -bei einer aufeinander abgestimmten Schallkennimpedanz- die Schallwellen optimal in die als Schallabsorber wirkende Schicht eingekoppelt und dort gebrochen, absorbiert und/oder gestreut werden.If according to the teaching of the invention either Plates formed as a sintered layer by means of a solder soldered to the base level and / or the top level, or else the ceramic layer Tile by means of an adhesive on the base level and / or the top level is glued on, there is the further advantage that - with one coordinated sound characteristic impedance - the sound waves optimal coupled into the layer acting as a sound absorber and there broken, absorbed and / or scattered.
Weitere zweckmäßige Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Further expedient refinements and developments the invention are characterized in the subclaims.
Ein Ausführungsbespiel der Erfindung wird nachfolgend unter Bezugnahme auf die Zeichnung näher erläutert. In dieser zeigt:An embodiment of the invention is explained in more detail below with reference to the drawing. In this shows:
Das elektrooptische Element gemäß
Wie aus
Die Flächennormale
Die Austrittsebene
Nachdem der Kristall doppeltbrechend
ist, wird der durch die Frontebene
Hierbei ist, wie in
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20220656U DE20220656U1 (en) | 2002-08-14 | 2002-08-14 | Electro-optical crystal element for an electro-optical modulator has entry and exit surface planes for light beams and electrode surface planes to create an electric field |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002137309 DE10237309A1 (en) | 2002-08-14 | 2002-08-14 | Electro-optical crystal element for an electro-optical modulator has entry and exit surface planes for light beams and electrode surface planes to create an electric field |
DE20220656U DE20220656U1 (en) | 2002-08-14 | 2002-08-14 | Electro-optical crystal element for an electro-optical modulator has entry and exit surface planes for light beams and electrode surface planes to create an electric field |
Publications (1)
Publication Number | Publication Date |
---|---|
DE20220656U1 true DE20220656U1 (en) | 2004-02-19 |
Family
ID=31947607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE20220656U Expired - Lifetime DE20220656U1 (en) | 2002-08-14 | 2002-08-14 | Electro-optical crystal element for an electro-optical modulator has entry and exit surface planes for light beams and electrode surface planes to create an electric field |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE20220656U1 (en) |
-
2002
- 2002-08-14 DE DE20220656U patent/DE20220656U1/en not_active Expired - Lifetime
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R207 | Utility model specification |
Effective date: 20040325 |
|
R150 | Term of protection extended to 6 years |
Effective date: 20050804 |
|
R151 | Term of protection extended to 8 years |
Effective date: 20080625 |
|
R152 | Term of protection extended to 10 years |
Effective date: 20100915 |
|
R071 | Expiry of right | ||
R071 | Expiry of right |