WO2022118386A1 - 光変調器 - Google Patents
光変調器 Download PDFInfo
- Publication number
- WO2022118386A1 WO2022118386A1 PCT/JP2020/044810 JP2020044810W WO2022118386A1 WO 2022118386 A1 WO2022118386 A1 WO 2022118386A1 JP 2020044810 W JP2020044810 W JP 2020044810W WO 2022118386 A1 WO2022118386 A1 WO 2022118386A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal layer
- core
- layer
- optical modulator
- optical
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 93
- 229910052751 metal Inorganic materials 0.000 claims abstract description 110
- 239000002184 metal Substances 0.000 claims abstract description 110
- 239000000463 material Substances 0.000 claims description 20
- 230000000694 effects Effects 0.000 claims description 5
- 238000005253 cladding Methods 0.000 abstract 7
- 230000005693 optoelectronics Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910002367 SrTiO Inorganic materials 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- QNDQILQPPKQROV-UHFFFAOYSA-N dizinc Chemical compound [Zn]=[Zn] QNDQILQPPKQROV-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- -1 tungsten nitride Chemical class 0.000 description 1
Images
Classifications
-
- 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
- G02F1/21—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 by interference
- G02F1/225—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 by interference in an optical waveguide structure
- G02F1/2255—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 by interference in an optical waveguide structure controlled by a high-frequency electromagnetic component in an electric 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
- 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
- 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
- G02F1/21—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 by interference
- G02F1/212—Mach-Zehnder type
Definitions
- the present invention relates to an optical modulator using an electro-optical material.
- the optical waveguide type high-speed phase shifter is being researched and developed as a key device with the aim of applying it to various applications using Tbit / s class ultra-high-speed optical communication and millimeter waves and terahertz waves.
- the plasmonic optical waveguide type phase shifter using an electro-optical (EO) material as a core uses a dielectric response by an external modulation electric field as an operating principle in order to cause a change in the refractive index, and further modulates a high frequency. Since an ultra-small phase shifter that can be regarded as a centralized constant element for a signal can be realized, it has a feature that an optical modulator capable of high-speed operation can be realized.
- a first metal layer 302 connected to a signal line (not shown) and a second metal arranged on both sides of the first metal layer 302 connected to a ground wire (not shown).
- a plasmonic optical waveguide is formed by the first metal layer 302, the two second metal layers 303a and 303b, and the cores 304a and 304b between them.
- first metal layer 302 and the second metal layers 303a and 303b are electrodes for applying a voltage for driving the light modulator 300 to the cores 304a and 304b.
- first metal layer 302, the second metal layer 303a, and the second metal layer 303b are electrodes for applying a voltage for driving the light modulator 300 to the cores 304a and 304b.
- the above-mentioned optical modulation It can be a vessel 300.
- the voltage for driving this light modulator is supplied from an external modulation signal source as a high frequency signal.
- an external modulation signal source As a high frequency signal.
- the frequency characteristics and output impedance of the externally modulated signal source and the optical modulation including the electrodes by the metal layer constituting the plasmonic optical waveguide are included. It is important to comprehensively consider the input impedance and frequency characteristics of the device when designing the high frequency of each element.
- a core 304a and a core 304b made of an EO material exist between the first metal layer 302 and the second metal layer 303a and the second metal layer 303b. Therefore, it is isolated in principle, and the input impedance of the optical modulator is infinite.
- Non-Patent Document 1 a high frequency signal from an external modulation signal source (source) is supplied through a line having a characteristic impedance of 50 ⁇ , and this line is open-ended.
- the optical modulator 300 is connected so as to do so. Therefore, the element design has not been made according to the output impedance of the externally modulated signal source (source), and the operating frequency band as an optical transmitter has not always been maximized.
- the reflection of the modulated high-frequency signal due to the impedance mismatch between the external modulation signal source (source) and the optical modulator 300 is also large, which may cause a frequency dependence peculiar to the frequency response characteristics of the optical transmitter. It was a big problem.
- a high frequency signal from a differential drive type external modulation signal source is supplied to the optical modulator 300, and the external modulation signal source and the optical modulator
- the optical modulator 300 is connected so as to be loaded as a centralized capacitance in the middle of the high frequency line between the 300 and the 300.
- the frequency of the optical modulator 300 by designing the input terminating resistor, the output terminating resistor, the line shape, and each material in FIG. 8 so as to show the desired frequency characteristics. The characteristics can be the same.
- the frequency characteristics of the optical modulator as described above follow the frequency characteristics of the high frequency line, the frequency characteristics of the optical modulator are optimized by compensating for or improving the frequency characteristics of the high frequency line. Furthermore, no method of maximizing the performance of the light modulator has been shown.
- the present invention has been made to solve the above problems, and optimizes and maximizes the high frequency characteristics of the voltage amplitude of the optical modulator by the plasmonic optical waveguide, and improves the performance as the optical modulator.
- the purpose is to make it.
- the optical modulator according to the present invention has a core formed on a lower clad layer made of a material having an electro-optical effect, and is arranged on the lower clad layer in a state of sandwiching the core.
- a first metal layer and a second metal layer formed in contact with the core and to which a high frequency signal is applied, and formed on the lower clad layer so as to cover the core, the first metal layer, and the second metal layer.
- a monic optical waveguide is configured.
- a resistance is provided on the upper clad layer above the core made of a material having an electro-optical effect, and the first metal layer and the second metal layer that enclose the core are formed. Since the connection is made, the high frequency characteristics of the voltage amplitude of the optical modulator by the plasmonic optical waveguide can be optimized and maximized, and the performance as the optical modulator can be improved.
- FIG. 1 is a cross-sectional view showing the configuration of the optical modulator according to the first embodiment of the present invention.
- FIG. 2A is a cross-sectional view showing the configuration of the optical modulator according to the second embodiment of the present invention.
- FIG. 2B is a plan view showing the configuration of the optical modulator according to the second embodiment of the present invention.
- FIG. 3 is a circuit diagram showing an equivalent circuit of an optical transmitter to which the optical modulator according to the second embodiment of the present invention is applied.
- FIG. 4 shows the frequency dependence of the high frequency voltage applied between the first metal layer 104 and the second metal layer 105a (second metal layer 105b) when the light modulator 100 is driven by the high frequency signal. It is a characteristic diagram.
- FIG. 1 is a cross-sectional view showing the configuration of the optical modulator according to the first embodiment of the present invention.
- FIG. 2A is a cross-sectional view showing the configuration of the optical modulator according to the second embodiment of the present invention.
- FIG. 2B
- FIG. 5 is a circuit diagram showing an equivalent circuit of another optical transmitter to which the optical modulator according to the second embodiment of the present invention is applied.
- FIG. 6 is a cross-sectional view showing the configuration of a conventional optical modulator.
- FIG. 7 is a circuit diagram showing an equivalent circuit of the optical transmitter of Non-Patent Document 1.
- FIG. 8 is a circuit diagram showing an equivalent circuit of the optical transmitter of Non-Patent Document 2.
- FIG. 1 shows a cross section of a surface perpendicular to the waveguide direction.
- This light modulator includes a core 103 formed on the lower clad layer 101, and a first metal layer 104 and a second metal layer 105 arranged on the lower clad layer 101 in a state of sandwiching the core 103. To prepare for.
- the core 103 is made of a material having an electro-optical effect.
- the first metal layer 104 and the second metal layer 105 are formed in contact with both side surfaces of the core 103, and the core 103, the first metal layer 104, and the second metal layer 105 form a plasmonic optical waveguide. Further, a high frequency signal is applied to the first metal layer 104 and the second metal layer 105.
- a slab layer 102 made of a material having an electro-optical effect is provided on the lower clad layer 101, and the core 103 is formed in contact with the slab layer 102.
- the slab layer 102 and the core 103 are integrally formed.
- the core 103 and the slab layer 102 constitute a well-known ribbed optical waveguide.
- the material having the above-mentioned electro-optic effect can be, for example, lithium niobate (LiNbO 3 ).
- the above-mentioned materials include, for example, strong dielectric perovskite oxide crystals such as BaTiO 3 , LiNbO 3 , LiTaO 3 , and KTN, and cubic perovskite oxidation such as KTN, BaTiO 3 , SrTiO 3 , and Pb 3 MgNb 2 O 9 . It can also be a physical crystal.
- the above-mentioned material may be KDP type crystal, zinc zinc ore type crystal or the like.
- the first metal layer 104 and the second metal layer 105 can be made of, for example, Au.
- the first metal layer 104 and the second metal layer 105 may be any metal as long as they can excite the surface plasmon polariton (SPP) at the interface with the core 103 with respect to the light having the wavelength waveguideed by the plasmonic optical waveguide.
- SPP surface plasmon polariton
- Au for example, Ag, Al, Cu, Ti, Pt and the like can be applied.
- this light modulator includes an upper clad layer 106 formed on the lower clad layer 101 so as to cover the core 103, the first metal layer 104, and the second metal layer 105.
- the lower clad layer 101 and the upper clad layer 106 can be made of an oxide such as silicon oxide.
- this light modulator comprises a resistor 107 formed on top of the upper clad layer 106 above the core 103.
- the resistance 107 is a first through wiring 108 that penetrates the upper clad layer 106 and is electrically connected to the first metal layer 104.
- the resistance 107 is a second through wiring 109 that penetrates the upper clad layer 106 and is electrically connected to the second metal layer 105.
- the resistance 107 can be made of a resistance material such as titanium nitride or tungsten nitride.
- the resistance 107 can also be made of a semiconductor such as Si into which an impurity expressing a predetermined conductive type is introduced.
- a phase shifter is composed of a first metal layer 104, a second metal layer 105, and a core 103, and a high-frequency signal is transmitted from an external modulation signal source (not shown) to the first metal layer 104 and the first metal layer 104.
- the electric field supplied to the two metal layers 105 and generated by the supplied high-frequency signal is applied to the core 103 to modulate the phase of the light waveguide through the plasmonic optical waveguide.
- the resistance 107 since the resistance 107 is connected in parallel to the core 103 to the first metal layer 104 and the second metal layer 105, the parasitic component can be reduced.
- the resistance 107 causes the frequency characteristics and output impedance of the external modulation signal source to be the input of the optical modulator including the first metal layer 104 and the second metal layer 105 constituting the plasmonic optical waveguide.
- High frequency design considering impedance and frequency characteristics is possible. As a result, it becomes possible to optimize and maximize the high frequency characteristics of the voltage amplitude of the optical modulator by the plasmonic optical waveguide, and improve the performance as the optical modulator.
- FIG. 2A shows a cross section of a plane perpendicular to the waveguide direction.
- the light modulator 100 according to the second embodiment includes two cores 103a and 103b formed on the lower clad layer 101.
- the two cores 103a and 103b extend parallel to each other.
- the core 103 and the core 103b are made of a material having an electro-optical effect.
- a slab layer 102 made of a material having an electro-optical effect is provided on the lower clad layer 101, and the core 103a and the core 103b are formed in contact with the slab layer 102.
- the slab layer 102, the core 103a, and the core 103b are integrally formed.
- the core 103a and the slab layer 102 constitute a well-known rib-type optical waveguide.
- the core 103b and the slab layer 102 form a rib-type optical waveguide.
- the material having the above-mentioned electro-optic effect can be, for example, lithium niobate (LiNbO 3 ).
- the width of the core 103a and the core 103b can be 40 nm, and the core height can be 100 nm.
- the thickness of the slab layer 102 is 100 nm, and the waveguide length is 10 ⁇ m.
- a first metal layer 104, two second metal layers 105a, and a second metal layer 105b arranged so as to sandwich the core 103a and the core 103b are provided on the lower clad layer 101.
- Two second metal layers 105a and two second metal layers 105b are provided corresponding to the two cores 103a and 103b.
- the first metal layer 104 is arranged so as to be sandwiched between the two cores 103a and 103b.
- the second metal layer 105a and the first metal layer 104 are arranged so as to sandwich the core 103a.
- the second metal layer 105b and the first metal layer 104 are arranged so as to sandwich the core 103b.
- Each core and each metal layer are formed in contact with each other on each side surface of the lower clad layer 101 in the plane direction.
- the light modulator 100 covers the two cores 103a, the core 103b, the first metal layer 104, and the two second metal layers 105a and the second metal layer 105b, and is formed on the lower clad layer 101.
- a clad layer 106 is provided.
- the upper clad layer 106 can have a thickness of, for example, 3 ⁇ m.
- the plasmonic optical waveguide is configured by the core 103a, the first metal layer 104, and the second metal layer 105a, and also constitutes a phase shifter.
- the core 103b, the first metal layer 104, and the second metal layer 105b form a plasmonic optical waveguide and also form a phase shifter.
- each of the two cores 103a and 103b is configured to be arranged on each of the two arms of the Mach-Zehnder interferometer 130, which is generally used in existing light modulators.
- the plasmonic optical waveguide by the core 103a constitutes one arm of the Mach-Zehnder interferometer 130
- the plasmonic optical waveguide by the core 103b constitutes the other arm of the Mach-Zehnder interferometer 130.
- Each arm of the Mach-Zehnder interferometer 130 is connected to an LN on-insulator (LNoI) dielectric optical waveguide via a mode converter.
- LNoI LN on-insulator
- This dielectric optical waveguide is, for example, a rib-type optical waveguide, and has a core width of 1 ⁇ m, a core height of 100 nm, and a slab thickness of 100 nm.
- a plasmonic optical waveguide and a dielectric optical waveguide are formed on the lower clad layer 101. Further, the upper clad layer 106 is formed in common with the plasmonic optical waveguide and the dielectric optical waveguide.
- a signal line is connected to the first metal layer 104
- a ground wire is connected to the two second metal layers 105a and the second metal layer 105b
- high-frequency signals are connected to the core 103a and the core 103b by these coplanar lines. Is applied.
- the light modulator 100 includes two resistances 107a and 107b corresponding to the two cores 103a and 103b.
- the two resistances 107a and 107b are formed on the upper clad layer 106.
- the resistor 107a is formed on the upper clad layer 106 above the core 103a.
- the resistor 107b is formed on the upper clad layer 106 above the core 103b.
- first through wiring 108a and a first through wiring 108b corresponding to the two second metal layers 105a, the second metal layer 105b, and the two resistances 107a and the resistance 107b.
- the resistance 107a is electrically connected to the second metal layer 105a by the second through wiring 109a.
- the resistance 107b is electrically connected to the second metal layer 105b by the second through wiring 109b.
- Each through wiring is formed through the upper clad layer 106.
- the parasitic components can be reduced by providing the resistors 107a and 107b. Further, the resistance 107a and the resistance 107b are connected so as to straddle the core 103a and the core 103b of the plasmonic optical waveguide having stronger optical confinement than the dielectric optical waveguide, thereby reducing the influence on the propagating light. can.
- a signal line is connected to the first metal layer 104 by partially using an electrode pad. Further, each of the two second metal layers 105a and the second metal layer 105b is connected to a ground wire by partially using an electrode pad. For example, as shown in the equivalent circuit of FIG. 6, a high frequency signal from an externally modulated signal source (source) is supplied through a signal line having a characteristic impedance of 50 ⁇ and a high frequency line (coplanar line) with a ground line. Further, the light modulator 100 is connected to this high frequency line.
- the high frequency voltage applied between the first metal layer 104 and the second metal layer 105a (second metal layer 105b) when the optical modulator 100 is driven by the modulation signal supplied by the above-mentioned high frequency line The frequency dependence of is shown in FIG.
- the vertical axis represents the high-frequency voltage amplitude applied between the first metal layer 104 and the second metal layer 105a (second metal layer 105b) between the signal line and the ground line of the high-frequency line. It is standardized by the high frequency voltage amplitude applied between them and displayed in logarithm.
- FIG. 7 shows the frequency response to each of the phase shifter by the core 103a and the phase shifter by the core 103b when the resistance values of the resistors 107a and 107b are changed.
- the -3dB band is about 75 GHz.
- a 100 ohm resistor 107a and a resistor 107b are provided in order to easily match the impedance of the input line, it is provided.
- the -3 dB band is widened to about 100 GHz. This can be said to be a state of being terminated by about 50 ohm.
- the -3 dB band is widened to about 160 GHz
- the resistance 107a and the resistance 107b of 10 ohm are provided, the band of the -3 dB band is expanded to 200 GHz or more.
- the absolute value of the voltage amplitude also changes according to the resistance values of the resistors 107a and 107b, and the voltage amplitude decreases as the resistance becomes lower. Therefore, the resistance value is appropriately set in consideration of the frequency band and the voltage amplitude. Is desirable.
- the optimum resistance values of the resistance 107a and the resistance 107b also change.
- the parasitic capacitance of the optical modulator also changes due to the change in the electrode pad structure provided in each metal layer for applying the high frequency modulation signal.
- the optimum resistance value of the resistance 107b also changes.
- the light modulator 100 using the phase shifter by the plasmonic optical waveguide is connected as the terminal element of the high frequency line, and the resistors 107a and 107b having appropriate resistance values according to the structure of the phase shifter are connected.
- the frequency characteristics of the voltage applied to each metal layer including the core 103a and the core 103b that determine the frequency characteristics of the optical modulator can be changed, and the desired frequency characteristics can be obtained.
- a high frequency signal from a differential drive type external modulation signal source is supplied to the optical modulator 100, and a high frequency line between the external modulation signal source and the optical modulator 100 is provided. It is also possible to connect the optical modulator 100 so that it is loaded as a centralized capacitance on the way.
- the frequency of the optical modulator 100 by designing the input terminating resistor, the output terminating resistor, the line shape, and each material in FIG. 5 so as to show the desired frequency characteristics. The characteristics can be the same.
- a resistance is provided on the upper clad layer above the core made of a material having an electro-optical effect, and the first metal layer and the second metal layer that enclose the core are provided. Since it is connected to, the high frequency characteristic of the voltage amplitude of the optical modulator by the plasmonic optical waveguide can be optimized and maximized, and the performance as the optical modulator can be improved.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
Description
はじめに、本発明の実施の形態に係る光変調器について、図1を参照して説明する。なお、図1は、導波方向に垂直な面の断面を示している。この光変調器は、下部クラッド層101の上に形成されたコア103と、下部クラッド層101の上で、コア103を挾む状態に配置された第1金属層104および第2金属層105とを備える。
次に、本発明の実施の形態2について、図2A、図2Bを参照して説明する。なお、図2Aは、導波方向に垂直な面の断面を示している。実施の形態2に係る光変調器100は、下部クラッド層101の上に形成された2つのコア103a、コア103bを備える。2つのコア103a、103bは、互いに平行に延在している。コア103、コア103bは、電気光学効果を有する材料から構成されている。
Claims (4)
- 電気光学効果を有する材料から構成されて下部クラッド層の上に形成されたコアと、
前記下部クラッド層の上で、前記コアを挾む状態に配置され、前記コアに接して形成され、高周波信号が印加される第1金属層および第2金属層と、
前記コア、前記第1金属層、および前記第2金属層を覆って前記下部クラッド層の上に形成された上部クラッド層と、
前記コアの上方の前記上部クラッド層の上に形成された抵抗と、
前記上部クラッド層を貫通して前記抵抗と前記第1金属層とを電気的に接続する第1貫通配線と、
前記上部クラッド層を貫通して前記抵抗と前記第2金属層とを電気的に接続する第2貫通配線と
を備え
前記コア、前記第1金属層、前記第2金属層によりプラズモニック光導波路が構成されていることを特徴とする光変調器。 - 請求項1記載の光変調器において、
互いに平行に延在する2つの前記コアを備え、
前記第1金属層は、2つの前記コアに挾まれて配置され、
2つの前記コアに対応して2つの前記第2金属層を備え、
2つの前記コアに対応して2つの前記抵抗を備え、
2つの前記第2金属層および2つの前記抵抗に対応して2つの前記第1貫通配線を備え、
前記第1金属層に信号線が接続し、2つの前記第2金属層の各々に接地線が接続し、
2つの前記コアの各々は、マッハツェンダー干渉計の2つのアームの各々に配置されている
ことを特徴とする光変調器。 - 請求項1または2記載の光変調器において、
前記下部クラッド層の上に形成され、電気光学効果を有する材料から構成されたスラブ層を備え、
前記コアは前記スラブ層の上に接して形成されている
ことを特徴とする光変調器。 - 請求項3記載の光変調器において、
前記スラブ層と前記コアとは、一体に形成されていることを特徴とする光変調器。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/253,888 US20240004258A1 (en) | 2020-12-02 | 2020-12-02 | Optical modulator |
PCT/JP2020/044810 WO2022118386A1 (ja) | 2020-12-02 | 2020-12-02 | 光変調器 |
JP2022566536A JPWO2022118386A1 (ja) | 2020-12-02 | 2020-12-02 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2020/044810 WO2022118386A1 (ja) | 2020-12-02 | 2020-12-02 | 光変調器 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022118386A1 true WO2022118386A1 (ja) | 2022-06-09 |
Family
ID=81853024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2020/044810 WO2022118386A1 (ja) | 2020-12-02 | 2020-12-02 | 光変調器 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20240004258A1 (ja) |
JP (1) | JPWO2022118386A1 (ja) |
WO (1) | WO2022118386A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013045022A (ja) * | 2011-08-25 | 2013-03-04 | Anritsu Corp | 光変調器モジュール |
JP2015118371A (ja) * | 2013-11-15 | 2015-06-25 | Tdk株式会社 | 光変調器 |
JP2018511084A (ja) * | 2015-04-01 | 2018-04-19 | エー・テー・ハー・チューリッヒEth Zuerich | 電気光学変調器 |
JP2019049647A (ja) * | 2017-09-11 | 2019-03-28 | 日本電信電話株式会社 | 半導体マッハツェンダ光変調器 |
US10488683B1 (en) * | 2017-03-06 | 2019-11-26 | Acacia Communications, Inc. | Traveling wave modulator |
-
2020
- 2020-12-02 WO PCT/JP2020/044810 patent/WO2022118386A1/ja active Application Filing
- 2020-12-02 JP JP2022566536A patent/JPWO2022118386A1/ja active Pending
- 2020-12-02 US US18/253,888 patent/US20240004258A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013045022A (ja) * | 2011-08-25 | 2013-03-04 | Anritsu Corp | 光変調器モジュール |
JP2015118371A (ja) * | 2013-11-15 | 2015-06-25 | Tdk株式会社 | 光変調器 |
JP2018511084A (ja) * | 2015-04-01 | 2018-04-19 | エー・テー・ハー・チューリッヒEth Zuerich | 電気光学変調器 |
US10488683B1 (en) * | 2017-03-06 | 2019-11-26 | Acacia Communications, Inc. | Traveling wave modulator |
JP2019049647A (ja) * | 2017-09-11 | 2019-03-28 | 日本電信電話株式会社 | 半導体マッハツェンダ光変調器 |
Also Published As
Publication number | Publication date |
---|---|
US20240004258A1 (en) | 2024-01-04 |
JPWO2022118386A1 (ja) | 2022-06-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5214724A (en) | Optical waveguide device with suppressed dc drift | |
JP4110182B2 (ja) | 光制御素子 | |
US5138480A (en) | Traveling wave optical modulator | |
US7912326B2 (en) | Optical control device | |
US8600197B2 (en) | Optical control device | |
WO2007114367A1 (ja) | 光制御素子 | |
JP3179408B2 (ja) | 導波路型光デバイス | |
US10228605B2 (en) | Waveguide optical element | |
JP2005506554A (ja) | 電気光学変調器の速度整合電極構造体 | |
JP3695717B2 (ja) | 光変調器 | |
US6356673B1 (en) | Low loss coplanar waveguide horn for low drive LiNbO3 modulators | |
JP2825056B2 (ja) | 光制御デバイス | |
US6741762B2 (en) | Back biased electro-optical modulator | |
JP2758538B2 (ja) | 光変調素子と光変調装置及びその駆動方法 | |
US20100158428A1 (en) | Optical modulator | |
JP6540744B2 (ja) | 光デバイス | |
JP3043614B2 (ja) | 導波路型光デバイス | |
WO2022118386A1 (ja) | 光変調器 | |
JP3559170B2 (ja) | 導波路型光デバイス | |
WO2022163724A1 (ja) | 光変調器とそれを用いた光送信装置 | |
JPH05264937A (ja) | 光制御デバイス | |
US4652078A (en) | Electro-optical directional coupler with three electrodes and alternating dephasing | |
JPH09297289A (ja) | 光制御デバイスとその動作方法 | |
JPS63261219A (ja) | 光変調素子 | |
US12025863B2 (en) | Electro-optic modulator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20964240 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022566536 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18253888 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 20964240 Country of ref document: EP Kind code of ref document: A1 |