WO2007033805A1 - Optisches element und verfahren zur steuerung seiner übertragungsfunktion - Google Patents
Optisches element und verfahren zur steuerung seiner übertragungsfunktion Download PDFInfo
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- WO2007033805A1 WO2007033805A1 PCT/EP2006/009043 EP2006009043W WO2007033805A1 WO 2007033805 A1 WO2007033805 A1 WO 2007033805A1 EP 2006009043 W EP2006009043 W EP 2006009043W WO 2007033805 A1 WO2007033805 A1 WO 2007033805A1
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- Prior art keywords
- electric field
- optical
- optical element
- electrodes
- grating
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/34—Optical coupling means utilising prism or grating
-
- 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
- G02F1/0311—Structural association of optical elements, e.g. lenses, polarizers, phase plates, with the crystal
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/124—Geodesic lenses or integrated gratings
-
- 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
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12083—Constructional arrangements
- G02B2006/12107—Grating
-
- 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
- G02F1/011—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 in optical waveguides, not otherwise provided for in this subclass
-
- 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
- G02F1/035—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 in an optical waveguide structure
-
- 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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating
- G02F2201/307—Reflective grating, i.e. Bragg grating
Definitions
- the invention belongs to the physical field of optics, namely to the optical methods and devices for spectral filtering of optical radiation. This is based on electro-optical crystals and is used to produce electrically controlled narrow-band filters with a wide wave spectrum of switching to wavelength, as well as for Production of selective optical attenuators and modulators of light and optical equalizers used.
- the volume of transmitted information is currently growing at a disproportionate rate and is leading to the development of new technologies making it possible to increase the data transmission of telecommunications networks.
- One of the most future-oriented methods is the compression of the signals in the channels of fiber-optic transmission networks (WDM - Wavelength Multiplexing Division)
- WDM - Wavelength Multiplexing Division The transmission of up to 80 spectral channels, generating wavelengths of equal distance in the spectrum from 1530 nm to 1600 nm, will enable in the near future
- WDM will not be practical in practice unless there are a variety of optical elements, such as splitters, routers, filters, modulators, amplifiers, etc. Also, to effectively leverage the new capabilities, control and switching are more optical In this way, the role of the controlled optical elements, such as the optical switch and the controllable optical filter, is increasingly growing. All known methods of spectral filtering of the optical radiation are based on diffraction of the radiation in Bragg's phase grating (US Pat.
- Phase grating previously fixed and written in a photorefractive crystal [GA Rakuljic, V Leyva - "Volume holographic narrow-band optical filter” -Opt Lett-1993, VoI 18, N 6 pp 459-461] it is possible to use both the volume and the waveguiding design of Braggs phase gratings [J Hukriede, I Nee, D Kip , E Kraetzig - "Thermally fixed reflection gratings for infrared light in LiNb03 Ti Fe Channel waveguides "- Opt Lett - 1998, VoI 23, N 17, pp 1405-1407]
- the actual spectral filtering is carried out in the following manner.
- the crystal is illuminated by a light beam in a direction substantially parallel to the direction of the vector of the phase grating, the light reflects only in the wavelength which corresponds to Bragg's condition in the phase grating in the opposite direction Exactly the light of the remaining wave spectrum passes through the optically transparent crystal Exactly, the light reflects at the phase grating in a certain narrow wave spectrum of the wavelength
- the spectral selectivity of such a filter depends on the length of the Bragg phase grating and corresponds to the following formula d ⁇ A n, if »- ⁇ B TT ⁇ n
- an electric field with field strength E can be applied transversely to the direction of the beam propagation of the light [R Muller, J V
- the filter When changing the electric field strength E, the filter is converted by selecting a specific wavelength ⁇ e of the radiation to be filtered.
- the waveguide design allows the creation of control fields at a relatively small applied voltage thanks to a very small distance between the electrodes (10 ⁇ m).
- a holographic optical element which fulfills the function of a narrow band optical filter.
- This element consists of a photorefractive crystal in which the Bragg phase grating is inscribed and fixed.
- the element has a very high spectral selectivity (it is possible to provide the filters with a width of the spectral transfer function of at least 10 pm).
- the element can be used for light filtering with input waviness of the wavefront as well as for simultaneous filtering of several wavelengths.
- the use of the known holographic element in fiber optic networks requires volume design and additionally collimated optics. This in turn requires a precise adjustment. This is extremely expensive and is therefore not suitable for mass production.
- the device closest to the element to be reported for a variety of its essential characteristics is the optical element described in [US005832148A]. It is based on a substrate to which has been applied a thin film of electro-optic material having a higher refractive index than that Refractive index of the substrate itself The above film is used as an optical waveguide In a further development thereof, a specific electro-optic material (LiNbO 3 ) is used as a substrate, and the optical waveguide is formed by diffusion of an intermediate layer of titanium ions. On the surface of the electro-optical layer, elongated electrodes are applied, to which a controlling voltage source is connected. The Bragg phase grating is inscribed in the waveguide layer
- the filter has a very high spectral selectivity and performs the function of an electrically tunable narrow-band optical filter (it is possible to provide filters with spectral selectivity of less than 10 pm)
- the design of the waveguide allows high electric field strength at a relatively low voltage thanks to a very small distance between the electrodes (10 ⁇ m)
- the wavelength range of the tunability of such a filter is limited by the voltage of the electric punch-through and, in the case of the LiNbO 3 -based filter, does not exceed 1 nm
- the wavelength range of the tunability of such a filter is limited by the voltage of the electrical breakdown and exceeds in the case of the filter on the
- the object of the invention is, on the one hand, the production of optical elements in an integral optical design that have multifunctional use (tunable optical filters, selective optical attenuators and modulators, optical switches and optical equalizers), and the high spectral selectivity, wide wavelength range of tunability, large Dynamic, and low tendency to crosstalk verfugen.
- a further object of this invention was the development of a control method of the above elements which makes it possible to electrically control the profile of the transfer function, the position of the maximum of the transfer function, the number of channels to be selected, the compensation of the phase distortion using a relative low control voltage, as well as high-speed tunability and circuit.
- the object is achieved by a plurality of inventions, which are connected by common intention to invent with each other, solved.
- the stated object is achieved in that the optical element is constructed on an electro-optical material in which the Bragg phase grating is formed.
- the grating has a means for forming spatially inhomogeneous, aperiodic, external electric fields at least over parts of the length of the grating along the direction of propagation of optical radiation.
- the Bragg phase grating can be formed in the optical waveguide of the electro-optic material, in the form of periodically applied elevations and depressions of the surface of the waveguide in the direction of light propagation.
- the Bragg phase grating can be formed in the optical waveguide of the electro-optic material, in the form of periodically applied elevations and depressions of the surface of the waveguide in the direction of light propagation.
- a layer of a material is applied to the surface of the grid, whose refractive index corresponds to the refractive index of the substrate, or from the
- Refractive index of the base may differ by a maximum of 40%.
- Field can be created by the application of two electrodes located on both sides of the grid described above.
- Field can be created by the application of two electrodes located on both sides of the grid described above. The distance between the two
- Electrodes change linearly along the direction of beam propagation.
- Field can be created by four isolated individual electrodes, which are in pairs from the two sides of the above-mentioned grid.
- Field can be created by four isolated individual electrodes, which are in pairs from the two sides of the above-mentioned grid. The distance between the respective pair of electrodes increases or decreases linearly along the
- Feldes can be isolated by applying at least three electrically isolated from each other
- Grids are determined along the direction of the optical radiation. This construction may e.g. be performed in the number N of the above-mentioned electrodes; while the
- the stated object can also be achieved by controlling the profile of the
- Bragg's phase grating is formed, which in turn via the means for creating a spatially inhomogeneous, aperiodic, external electric field at least on parts of
- Lattice length along the direction of propagation of optical radiation features, through the At least a portion of the grid of a spatially inhomogeneous, aperiodic, external electric field is effected, which causes the change in the diffraction of the optical radiation, up to their maximum change.
- the direction of the vector of electric field strength may be formed on one part of the above-mentioned grating in the opposite direction to that of the vector of electric field strength on the other part of the grating.
- the object of the invention is that the diffraction on the Bragg grating, which is generated in the electro-optical material, is controlled by the formation of an inhomogeneous distribution of the electric field within the material.
- control voltage can be significantly reduced and the speed of the transfer function can be significantly increased.
- Refractive index corresponds to the refractive index of the substrate, or from the
- Refractive index of the substrate may deviate by a maximum of 40%.
- the size of the electrical breakdown can be substantially increased (increased), and thus the size of the tunable wavelength range is substantially increased. This is done by using an additional layer of electrically isolable
- the diffraction of the radiation to be filtered is controlled by the formation of an electric field of a certain strength in the crystal, whereby the refractive index of the crystal is changed.
- a special feature of the method to be registered is that the electric field in the direction of the
- the required transfer function of the optical element can be created, resulting in
- Multifunctionality of the optical element leads.
- the diffraction efficiency of the grating can be substantially reduced to zero.
- an electric spectrally-selective light switch can be provided.
- the switching speed of such a switch is thanks to the electro-optical
- Bragg phase grating to be controlled.
- such element functions as an electrically controlled selective light modulator.
- the profile of the transfer function of the Bragg phase grating can be electrically controlled.
- This reconfiguration is accomplished by applying electric fields to two equal halves of the grating that produce a phase shift equal to ⁇ for the light waves reflected from both halves of the grating.
- the optical element to be registered can function as a universal optical switch with a variable number of spectral channels. There is a certain
- optical element to be registered can be considered as an electrically controlled optical
- the optical element to be registered can function as a narrow band optical filter having a wide wavelength range.
- the optical element to be registered can act as a compensator of the optical spectral dispersion.
- Fig.1 shows the prototype of the optical element with two electrodes. (U 1 and U 2 represent the electrical voltages applied to the electrodes. Compensating and insulating material layers are not shown.)
- Fig. 2 shows the optical element with two electrodes. The distance between the two electrodes decreases linearly along the direction of beam propagation.
- Fig.3 shows the optical element with four electrodes.
- Fig. 4 shows the optical element with four electrodes. The distance between each pair of electrodes varies linearly along the direction of beam propagation.
- Fig. 5 shows the optical element with 3 electrodes.
- Fig. 6 shows the optical element with 8 electrodes.
- Fig. 7 shows the optical element in longitudinal section.
- the Bragg phase grating is constructed as a series of periodically mounted elevations and depressions of the surface of the waveguide, coated with a layer of the compensating and a layer of electrically insulating material. (h height of the waveguide. ⁇ h height difference between the pits and elevations).
- the section runs along the waveguide (in the plane ABC).
- Fig. 8 shows the cross section of the above-mentioned optical element.
- the section runs transversely to the axis of the waveguide (in the plane DEF).
- Fig. 9 shows the dependence of the electric field strength E on the coordinates along the direction of beam propagation for the arrangement of the electrodes on the element as shown in Fig. 2.
- Fig.10 shows the dependence of the electric field strength E on the coordinates along the direction of beam propagation for the arrangement of the electrodes on the element as shown in fig.
- Fig. 11 shows the spectral characteristic of the reflection coefficient of the Bragg phase grating, ( ⁇ -wavelength of the optical radiation, ⁇ ⁇ - central wavelength of the reflected optical radiation, d - width of the transfer function of the Bragg phase grating).
- Fig. 12 shows the prototype of the optical element with a phase grating to which an external, homogeneous electric field E is applied.
- Ebd- electric field strength at which the electrical breakdown of the optical filter takes place -E b d- electric field strength with reversible polarity
- E 0 - electric field strength which changes the central wavelength of the reflected radiation in the amount of the width of the transfer function of Bragg Phase grating (d) is used, T-length of the phase grating).
- Fig. 14 shows one of the variants of the spatially inhomogeneous, external electric field attached to the optical element.
- E ⁇ / 2 electric field strength on the first half of the grating which provides an additional phase difference of the optical radiation equal to ⁇ / 2;
- -E "n - electric field strength on the second half of the grating providing an additional phase difference of the grating creates optical radiation equal to - ⁇ / 2 -).
- Fig. 15 shows the transfer function of the element, in the case where the electric field shown in Fig. 14 is applied to the element (solid line) Line- in the absence of the external electric field; dashed line- in the presence of the external electric field).
- Fig. 16 shows another possible variant of the spatially inhomogeneous, external electric field applied to the optical element. (E bd - electric field strength on the first half of the lattice, -bd - electric field strength on the second half of the lattice).
- Fig. 17 shows the transfer function of the element, in the case where the electric field shown in Fig.16 is applied to the filter (solid line- in the absence of the external electric field, dashed line- in the presence of the external electrical field) field).
- Fig. 18 shows another possible variant of the spatially inhomogeneous, external electric field applied to the optical element. (Ibid electric field strength on the first eighth of the lattice at which the electrical breakdown of the optical filter takes place-Ib electric field strength on the last eighth of the lattice with reversed polarity).
- Fig. 19 shows the transfer function of the element, in the case where the electric field shown in Fig.18 is applied to the filter (solid line - in the absence of the external electric field, dashed line - in the presence of the external electric) field).
- the optical element to be registered includes a circuit board 1 of electro-optical material in which the optical waveguide 2 can be formed (see Fig. 2).
- the electro-optical material crystals such as LiNbO 3 , KNbO 3 , BaTiO 3 , SBN can be used.
- the Bragg phase grating 3 can be formed both in the actual material of the circuit board 1 and in the optical waveguide 2.
- the grid 3 can be formed in the form of periodically applied elevations 6 and depressions 7 of the surface of the waveguide in the direction of light propagation (see FIGS. 7, 8). Above the periodic peaks and valleys of the waveguide, a compensating layer of material 8 is applied. This layer may for example consist of TiO 2 or SiO 2 .
- the grating 3 From both sides of the grating 3 is the means for the formation of spatially inhomogeneous aperiodic external electric fields in the form of the electrodes 4, to which via contacts 5 electrical voltages U 1 , U 2 , U 3 , U N are mounted (depending on the Number and configuration of the electrodes 4, the applied voltages may be either equal or different in magnitude and either different or equal in polarity)
- the spatially inhomogeneous aperiodic external electric field can be formed by electrodes 4 having different geometry. For example, two electrodes whose distance from each other varies linearly along the direction of beam propagation (see Fig. 2) ), by three rectangular electrodes (see Fig. 5), which are subjected to different voltages Ui, U 2 , U 3 ; by four electrodes of different geometry (see Fig. 3, 4), by eight rectangular electrodes (see Fig. 6), to which different voltages are applied U 1 , U2, U3, Us, by N electrodes, where N> 2D / d
- the above examples do not limit the choice of the number of electrodes and their configuration
- the transmission function of the optical element to be registered is controlled as follows. Within the electro-optical material 1, the necessary distribution of the electric field voltage is formed
- FIG. 2 shows an example of the configuration of the electrodes for the formation of a space inhomogeneous aperiodic electric field
- the inhomogeneity of the electric field is determined by the change in the distance between the electrodes
- the distribution of the electric field strength for the configuration of the electrodes shown in Fig. 2 is shown in Fig. 9
- the maximum possible significance of the electric field and the resulting Connected maximum gradient is determined by the height of the electrical breakdown Ibid
- Figure 4 shows the possibility of increasing the gradient of the electric field strength through the formation of the system, which in turn forms the inhomogeneous electric field in which Shape of 2 pairs of electrodes, with the changing distance between the electrodes
- the voltages U 1 , U 2 each with reversed polarity, act on each pair of electrodes.
- the distribution of the electric field strength within the electro-optical material which corresponds to this configuration of the electrodes, is in The means for forming a spatially inhomogeneous, aperiodic electric field in the form of N electrodes, on which the voltages act by the contacts U, makes it possible to form different distributions of the electric field strength within the electro-optical material, and what It is particularly important that the nature of the dependence of the distribution of the electric field strength can be changed by the change in the level of applied voltages
- phase relationships can be disregarded in the addition of the light radiation reflected from the two halves of the grating
- the transfer function of the optical element converts into the addition of Transfer function of the two halves of the Bragg phase grating. Transfer function for this case is shown in Fig. 17.
- Fig. 18 shows the spatial distribution of the electric field strength, in the case where the Bragg phase grating is divided into eight parts.
- a distribution of the field can be formed by a system of electrodes, as shown in FIG.
- the light breaks on eight independent parts of the grid with shifted central wavelengths. This leads to a reduction in the added reflection coefficient as well as to a reduction in the spectral selectivity, ie to cancel the transfer function of the filter (see FIG. 19).
- aperiodic external electric field consists of N electrodes, it is possible to form an independent electric field on N / 2 of the parts of the grid (2 electrodes on each side of the waveguide on each part of the grid).
- the optimum number of electrodes is selected from the ratio N> 2D / d, ie for the effective cancellation of the diffraction (reduction of the added reflection coefficient as well as for the reduction of the spectral selectivity) it is necessary to set the lattice to N / 2 to divide independent parts.
- the number N is determined by the number of required selective channels.
- the type of transfer function of the optical element can be changed by using a spatially inhomogeneous external electric field.
- the example of canceling the diffraction on the Bragg phase grating was shown by reducing the added reflection coefficient and reducing the spectral selectivity.
- the method of controlling the transfer function of the optical element to be registered can be used in narrow-band optical filters, optical attenuators, optical modulators and in phase dispersion compensators.
- the examples set forth above do not limit the possible areas of application of transfer function control.
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- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optical Integrated Circuits (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06805742A EP1989580A1 (de) | 2005-09-19 | 2006-09-16 | Optisches element und verfahren zur steuerung seiner übertragungsfunktion |
JP2008530430A JP2009509182A (ja) | 2005-09-19 | 2006-09-16 | 光学素子およびその伝達関数を制御するためのプロセス |
US12/067,283 US20080317400A1 (en) | 2005-09-19 | 2006-09-16 | Optical Element and Method for Controlling Its Transfer Function |
BRPI0617568-6A BRPI0617568A2 (pt) | 2005-09-19 | 2006-09-16 | elemento àtico e procedimento para o controle da funÇço de transferÊncia de um elemento àtico |
Applications Claiming Priority (2)
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DE102005044730A DE102005044730B4 (de) | 2005-09-19 | 2005-09-19 | Optisches Element und Verfahren zur Steuerung seiner Übertragungsfunktion |
DE102005044730.9 | 2005-09-19 |
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WO2007033805A1 true WO2007033805A1 (de) | 2007-03-29 |
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PCT/EP2006/009043 WO2007033805A1 (de) | 2005-09-19 | 2006-09-16 | Optisches element und verfahren zur steuerung seiner übertragungsfunktion |
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US (1) | US20080317400A1 (de) |
EP (1) | EP1989580A1 (de) |
JP (1) | JP2009509182A (de) |
KR (1) | KR20080074862A (de) |
CN (1) | CN101292185A (de) |
BR (1) | BRPI0617568A2 (de) |
DE (1) | DE102005044730B4 (de) |
WO (1) | WO2007033805A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008035674A1 (de) | 2008-07-30 | 2010-02-04 | Swet Optics Gmbh | Elektrisch steuerbares optisches Element |
EP2187253A1 (de) | 2008-11-17 | 2010-05-19 | Swet Optics Gmbh | Elektrisch steuerbares optisches Element mit einer optischen Faser |
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WO2018106080A1 (ko) * | 2016-12-08 | 2018-06-14 | 한국과학기술원 | 위상차 제어 디바이스 및 상기 디바이스를 이용하는 광학 장치 |
CN111240015B (zh) * | 2020-01-17 | 2020-12-18 | 北京理工大学 | 双侧对射出光均匀的衍射波导 |
CN114609725B (zh) * | 2020-12-08 | 2024-01-05 | 军事科学院系统工程研究院网络信息研究所 | 基于微失谐级联滤波器的超窄带滤波方法 |
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US5832148A (en) * | 1995-12-20 | 1998-11-03 | California Institute Of Technology | Electrically controlled wavelength multiplexing waveguide filter |
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US4039249A (en) * | 1973-03-28 | 1977-08-02 | Bell Telephone Laboratories, Incorporated | Integrated optical devices including tunable fixed grating |
JPS5452562A (en) * | 1977-10-03 | 1979-04-25 | Mitsubishi Electric Corp | Variable wavelength selection filter |
CA2197706A1 (en) * | 1997-02-14 | 1998-08-14 | Peter Ehbets | Method of fabricating apodized phase mask |
JP2000235170A (ja) * | 1999-02-17 | 2000-08-29 | Nec Corp | 可変分散補償器 |
JP2001183541A (ja) * | 1999-12-21 | 2001-07-06 | Mitsubishi Electric Corp | 偏波モード分散等化器 |
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2005
- 2005-09-19 DE DE102005044730A patent/DE102005044730B4/de not_active Expired - Fee Related
-
2006
- 2006-09-16 CN CNA200680038828XA patent/CN101292185A/zh active Pending
- 2006-09-16 EP EP06805742A patent/EP1989580A1/de not_active Withdrawn
- 2006-09-16 WO PCT/EP2006/009043 patent/WO2007033805A1/de active Application Filing
- 2006-09-16 US US12/067,283 patent/US20080317400A1/en not_active Abandoned
- 2006-09-16 BR BRPI0617568-6A patent/BRPI0617568A2/pt not_active IP Right Cessation
- 2006-09-16 KR KR1020087009325A patent/KR20080074862A/ko not_active Application Discontinuation
- 2006-09-16 JP JP2008530430A patent/JP2009509182A/ja active Pending
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US5832148A (en) * | 1995-12-20 | 1998-11-03 | California Institute Of Technology | Electrically controlled wavelength multiplexing waveguide filter |
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PETROV M P ET AL: "ELECTRICALLY CONTROLLED INTEGRATED OPTICAL FILTER", TECHNICAL PHYSICS LETTERS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 30, no. 2, February 2004 (2004-02-01), pages 120 - 122, XP008073404, ISSN: 1063-7850 * |
SHAMRAY A V ET AL: "New method to control the shape of spectral characteristics of Bragg gratings in electrooptical materials", QUANTUM ELECTRONICS TURPION LTD.; KVANTOVAYA ELEKTRONIKA UK, vol. 35, no. 8, August 2005 (2005-08-01), pages 734 - 740, XP008073496, ISSN: 1063-7818 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008035674A1 (de) | 2008-07-30 | 2010-02-04 | Swet Optics Gmbh | Elektrisch steuerbares optisches Element |
EP2187253A1 (de) | 2008-11-17 | 2010-05-19 | Swet Optics Gmbh | Elektrisch steuerbares optisches Element mit einer optischen Faser |
Also Published As
Publication number | Publication date |
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EP1989580A1 (de) | 2008-11-12 |
CN101292185A (zh) | 2008-10-22 |
JP2009509182A (ja) | 2009-03-05 |
US20080317400A1 (en) | 2008-12-25 |
DE102005044730A1 (de) | 2007-05-31 |
KR20080074862A (ko) | 2008-08-13 |
BRPI0617568A2 (pt) | 2011-07-26 |
DE102005044730B4 (de) | 2008-12-11 |
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