CN110967847A - Complex amplitude spatial light modulator and working method thereof - Google Patents
Complex amplitude spatial light modulator and working method thereof Download PDFInfo
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- CN110967847A CN110967847A CN201911321744.2A CN201911321744A CN110967847A CN 110967847 A CN110967847 A CN 110967847A CN 201911321744 A CN201911321744 A CN 201911321744A CN 110967847 A CN110967847 A CN 110967847A
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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
- G02F1/0102—Constructional details, not otherwise provided for in this subclass
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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
- G02F1/0121—Operation of devices; Circuit arrangements, not otherwise provided for in this subclass
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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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The application provides a complex amplitude spatial light modulator and a working method thereof. The complex amplitude spatial light modulator comprises a modulation panel and a driving device, wherein the modulation panel comprises a plurality of complex amplitude modulation units, and the driving device comprises a plurality of driving units; the complex amplitude modulation unit is used for simultaneously modulating the phase and the amplitude of incident light; the driving units correspond to the complex amplitude modulation units one to one, and the driving units are used for loading modulation information to the corresponding complex amplitude modulation units so as to perform complex amplitude modulation on incident light. The complex amplitude spatial light modulator realizes complex amplitude modulation of incident light by a single complex amplitude spatial light modulator, thereby simplifying complex amplitude modulation debugging steps and reducing the cost of a complex amplitude modulation technology.
Description
Technical Field
The present application relates to the field of optics, and in particular, to a complex amplitude spatial light modulator and a method for operating a complex amplitude spatial light modulator.
Background
The spatial light modulator is an optical device which modulates a certain parameter of a light field to write certain information into a light wave, and the information can be conveniently loaded into a one-dimensional or two-dimensional light field through the spatial light modulator.
The existing spatial light modulator can only realize single amplitude modulation or phase modulation, when complex amplitude modulation is required to be carried out on incident light, namely, when the phase and the amplitude of the incident light are simultaneously modulated, the two spatial light modulators need to be combined for use, and the pixel sizes of the two spatial light modulators are required to be consistent with the resolution. When pixels of the two spatial light modulators are matched one by one, the installation and the adjustment are complex, the operation difficulty is increased, and the actual use is not facilitated.
Disclosure of Invention
In order to solve at least one of the above problems in the prior art, the present application provides a complex amplitude spatial light modulator and a method for operating the complex amplitude spatial light modulator.
As a first aspect of the present application, there is provided a complex amplitude spatial light modulator comprising a modulation panel comprising a plurality of complex amplitude modulation units and a driving device comprising a plurality of driving units;
the complex amplitude modulation unit is used for simultaneously modulating the phase and the amplitude of incident light;
the driving units correspond to the complex amplitude modulation units one to one, and the driving units are used for loading modulation information to the corresponding complex amplitude modulation units so as to perform complex amplitude modulation on incident light.
Optionally, each of the complex amplitude modulation units includes a phase modulation subunit and an amplitude modulation subunit;
the phase modulation subunit is used for modulating the phase of the incident light according to the modulation information loaded by the driving unit;
the amplitude modulation subunit is used for modulating the amplitude of the incident light according to the modulation information loaded by the driving unit.
Optionally, the modulation panel includes a first liquid crystal structure array and a first micro-nano structure array, the first liquid crystal structure array includes a plurality of first liquid crystal structure units, the first micro-nano structure array includes a plurality of first micro-nano structure units, the first liquid crystal structure units and the first micro-nano structure units are arranged in a one-to-one correspondence manner, and each first liquid crystal structure unit and the corresponding first micro-nano structure unit form one complex amplitude modulation unit;
the first liquid crystal structure unit forms the phase modulation subunit and is used for modulating the phase of incident light according to the modulation information loaded by the driving unit;
the first micro-nano structure unit forms the amplitude modulation subunit and is used for modulating the amplitude of incident light according to the modulation information loaded by the driving unit.
Optionally, the modulation panel includes a second micro-nano structure array and a third micro-nano structure array, the second micro-nano structure array includes a plurality of second micro-nano structure units, the third micro-nano structure array includes a plurality of third micro-nano structure units, the second micro-nano structure units and the third micro-nano structure units are arranged in a one-to-one correspondence manner, and each second micro-nano structure unit and the corresponding third micro-nano structure unit form one complex amplitude modulation unit;
the second micro-nano structure unit forms the phase modulation subunit and is used for modulating the phase of incident light according to the modulation information loaded by the driving unit;
the third micro-nano structure unit forms the amplitude modulation subunit and is used for modulating the amplitude of incident light according to the modulation information loaded by the driving unit.
Optionally, each of the drive units comprises a first drive sub-element and a second drive sub-element;
the first driving sub-element corresponds to a phase modulation sub-element of a complex amplitude modulation unit corresponding to the driving unit and is used for loading phase modulation information to the phase modulation sub-element so as to modulate the phase of incident light;
the second driving sub-element corresponds to an amplitude modulation sub-element of the complex amplitude modulation unit corresponding to the driving unit, and is configured to load amplitude modulation information to the amplitude modulation sub-element, thereby modulating the amplitude of the incident light.
Optionally, each of the driving units includes a first electrode and a second electrode;
the first electrode forms the first driving sub-element and is used for changing the voltage of the phase modulation sub-element to load phase modulation information to the phase modulation sub-element so as to modulate the phase of incident light;
the second electrode constitutes the second driving subunit, and is used for changing the voltage of the amplitude modulation subunit to load amplitude modulation information to the amplitude modulation subunit, so that the amplitude of the incident light is modulated.
Optionally, the modulation panel includes a fourth micro-nano structure array, and the fourth micro-nano structure array includes a plurality of fourth micro-nano structure units;
the fourth micro-nano structure unit forms the complex amplitude modulation unit and is used for simultaneously modulating the phase and the amplitude of incident light.
As a second aspect of the present application, there is provided a method of operating a complex amplitude spatial light modulator, the complex amplitude spatial light modulator including a modulation panel and a driving device, the modulation panel including a plurality of complex amplitude modulation units, the driving device including a plurality of driving units, the method including:
the complex amplitude modulation unit simultaneously modulates the phase and the amplitude of incident light;
the driving units correspond to the complex amplitude modulation units one to one, and the driving units load modulation information to the corresponding complex amplitude modulation units, so that the incident light is subjected to complex amplitude modulation.
Optionally, each complex amplitude modulation unit includes a phase modulation subunit and an amplitude modulation subunit, and the operating method includes:
the phase modulation subunit modulates the phase of incident light according to the modulation information loaded by the driving unit;
the amplitude modulation subunit modulates the amplitude of the incident light according to the modulation information loaded by the driving unit.
Optionally, each of the driving units includes a first driving sub-element and a second driving sub-element, and the working method includes:
the first driving sub-element corresponds to a phase modulation sub-element of a complex amplitude modulation unit corresponding to the driving unit, and phase modulation information is loaded to the phase modulation sub-element, so that the phase of incident light is modulated;
the second drive subunit corresponds to an amplitude modulation subunit of the complex amplitude modulation unit corresponding to the drive unit, and the amplitude modulation subunit is loaded with amplitude modulation information to modulate the amplitude of the incident light.
The complex amplitude spatial light modulator is provided with the complex amplitude modulation units on the modulation panel, and can modulate the amplitude and the phase of incident light according to modulation information loaded by the driving unit of the driving device, namely, the complex amplitude modulation of the incident light by a single complex amplitude spatial light modulator is realized, so that the complex amplitude modulation debugging step is simplified, and the cost of a complex amplitude modulation technology is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of a complex amplitude spatial light modulator according to one embodiment of the present disclosure;
FIG. 2 is a schematic diagram of another embodiment of a complex amplitude spatial light modulator provided herein;
FIG. 3 is a schematic diagram of a structure of yet another embodiment of a complex amplitude spatial light modulator provided herein;
FIG. 4 is a schematic diagram of a structure of yet another embodiment of a complex amplitude spatial light modulator provided herein;
FIG. 5 is a schematic diagram of a structure of yet another embodiment of a complex amplitude spatial light modulator provided herein;
FIG. 6 is a flow chart of one embodiment of a method of operation of a complex amplitude spatial light modulator provided herein;
FIG. 7 is a flow chart of another embodiment of a method of operation of a complex amplitude spatial light modulator provided herein;
fig. 8 is a flow chart of another embodiment of a method of operating a complex amplitude spatial light modulator provided herein.
Detailed Description
The following detailed description of embodiments of the present application will be made with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present application, are given by way of illustration and explanation only, and are not intended to limit the present application.
As a first aspect of the present embodiment, there is provided a complex amplitude spatial light modulator comprising a modulation panel 1 and a driving device 2, the modulation panel 1 comprising a plurality of complex amplitude modulation units 11, and the driving device comprising a plurality of driving units 21. When incident light is irradiated onto the complex amplitude modulation section 11, the complex amplitude modulation section 11 simultaneously modulates the phase and amplitude of the incident light, thereby obtaining modulated light. In the present embodiment, the complex amplitude modulation unit 11 can realize a transmissive or reflective modulation effect, that is, the complex amplitude spatial light modulator provided in the present embodiment may be a transmissive spatial light modulator or a reflective spatial light modulator. The driving units 21 correspond to the complex amplitude modulation units 11 one to one, and the driving units 21 are configured to load modulation information to the corresponding complex amplitude modulation units 11, so as to perform complex amplitude modulation on incident light. In this embodiment, how the driving unit 21 loads the modulation information to the complex amplitude modulation unit 11 is not particularly limited, and for example, the voltage or temperature of the complex amplitude modulation unit 11 may be changed to change the optical property thereof, so as to load the modulation information to the complex amplitude modulation unit 11.
In the complex amplitude spatial light modulator provided by the embodiment, the modulation panel is provided with the multiple complex amplitude modulation units, and the amplitude and the phase of the incident light can be modulated according to the modulation information loaded by the driving unit of the driving device, that is, the complex amplitude modulation of the incident light by the single complex amplitude spatial light modulator is realized, so that the complex amplitude modulation debugging step is simplified, and the cost of the complex amplitude modulation technology is reduced.
Assuming that the complex amplitude information of the incident light is 1exp (j0) ═ 1, the complex amplitude information of the outgoing light is 1
Wherein the amplitude modulation range A is equal to 0,1]Phase modulation range
Therefore, the phase and the amplitude of the incident light can be modulated respectively, and then the modulated light after complex amplitude modulation can be obtained through coupling. Further, as a specific embodiment, one amplitude modulation subunit and one phase modulation subunit may be disposed on one complex amplitude modulation unit, and the outgoing light passing through the complex amplitude modulation unit is the coupled light modulated by the amplitude modulation subunit and the one phase modulation subunit. As shown in fig. 2, each complex amplitude modulation unit 11 includes a phase modulation subunit 101 and an amplitude modulation subunit 102; the phase modulation subunit 101 is configured to modulate a phase of incident light according to the modulation information loaded by the driving unit 21; the amplitude modulation subunit 102 is configured to modulate the amplitude of the incident light according to the modulation information loaded by the driving unit 21.
In the present embodiment, the arrangement of the phase modulation subunit 101 and the amplitude modulation subunit 102 is not particularly limited. Fig. 2 shows, by way of example only, the case where the phase modulation subunit 101 is located above the amplitude modulation subunit 102.
In the present embodiment, specific structures of the phase modulation subunit 101 and the amplitude modulation subunit 102 are not particularly limited, and any structure capable of performing phase or amplitude modulation on incident light is within the scope of the present application.
Specifically, the present embodiment provides three specific examples of the phase modulation subunit 101 and the amplitude modulation subunit 102:
example one
As shown in fig. 2 and fig. 3, the modulation panel 1 is composed of a first liquid crystal structure array and a first micro-nano structure array, the first liquid crystal structure array includes a plurality of first liquid crystal structure units, the first micro-nano structure array includes a plurality of first micro-nano structure units, the first liquid crystal structure units and the first micro-nano structure units are arranged in a one-to-one correspondence manner, and each first liquid crystal structure and the corresponding first micro-nano structure form one complex amplitude modulation unit 11; the first liquid crystal structure unit constitutes the phase modulation subunit 101, and is configured to modulate a phase of incident light according to the modulation information loaded by the driving unit 21; the first micro-nano structure unit forms the amplitude modulation subunit 102, and is configured to modulate the amplitude of incident light according to the modulation information loaded by the driving unit 21.
Example two
As shown in fig. 2 and 4, the modulation panel 1 includes a second micro-nano structure array and a third micro-nano structure array, the second micro-nano structure array includes a plurality of second micro-nano structure units, the third micro-nano structure array includes a plurality of third micro-nano structure units, the second micro-nano structure units and the third micro-nano structure units are arranged in a one-to-one correspondence manner, and each second micro-nano structure unit and the corresponding third micro-nano structure unit form one complex amplitude modulation unit 11; the second micro-nano structure unit forms the phase modulation subunit 101, and is used for modulating the phase of incident light according to the modulation information loaded by the driving unit 21; the third micro-nano structure unit forms the amplitude modulation subunit 102, and is configured to modulate the amplitude of incident light according to the modulation information loaded by the driving unit 21.
EXAMPLE III
As shown in fig. 2 and 5, the modulation panel includes a fourth micro-nano structure array, and the fourth micro-nano structure array includes a plurality of fourth micro-nano structure units; the fourth micro-nano structure unit constitutes the complex amplitude modulation unit 11, and is configured to simultaneously modulate the phase and the amplitude of incident light. Further, the fourth micro-nano structure unit is a C-shaped ring structure, the C-shaped ring structure can change the radius difference of the inner ring and the outer ring according to modulation information so as to modulate the amplitude of incident light, and can also change the opening direction according to the modulation information so as to modulate the phase of the incident light.
In the present embodiment, the phase modulation subunit 101 and the amplitude modulation subunit 102 are each loaded with modulation information, thereby realizing modulation of the phase and amplitude of incident light. Accordingly, as shown in fig. 2, each of the driving units 21 of the driving device 2 includes a first driving sub-element 201 and a second driving sub-element 202; the first driving subunit 201 corresponds to the phase modulation subunit 101 of the complex amplitude modulation unit 11 corresponding to the driving unit 21, and is configured to apply phase modulation information to the phase modulation subunit 101, so as to modulate a phase of incident light; the second driving subunit 202 corresponds to the amplitude modulation subunit 102 of the complex amplitude modulation unit 11 corresponding to the driving unit 21, and is configured to load amplitude modulation information to the amplitude modulation subunit 102, so as to modulate the amplitude of the incident light.
In the present embodiment, the structures of the first driving subunit 201 and the second driving subunit 202 are not particularly limited, and the arrangement of the first driving subunit 201, the second driving subunit 202, the phase modulation subunit 101, and the amplitude modulation subunit 102 is not particularly limited. Fig. 2 shows, by way of example only, the situation in which the first drive sub-element 201 is located above the phase modulation sub-element 101 and the second drive sub-element 202 is located below the amplitude modulation sub-element 102.
Specifically, the present embodiment provides an example of the first drive subunit 201 and the second drive subunit 202:
example four
Each of the driving units 21 includes a first electrode and a second electrode; the first electrode forms the first driving sub-element and is used for changing the voltage of the phase modulation sub-element to load phase modulation information to the phase modulation sub-element so as to modulate the phase of incident light; the second electrode constitutes the second driving subunit, and is used for changing the voltage of the amplitude modulation subunit to load amplitude modulation information to the amplitude modulation subunit, so that the amplitude of the incident light is modulated.
As a second aspect of the present embodiment, there is provided an operating method of a complex amplitude spatial light modulator, as shown in fig. 1, the complex amplitude spatial light modulator includes a modulation panel 1 and a driving device 2, the modulation panel 1 includes a plurality of complex amplitude modulation units 11, the driving device includes a plurality of driving units 21, and as shown in fig. 6, the operating method includes:
in step S101, the complex amplitude modulation means simultaneously modulates the phase and amplitude of incident light;
in step S102, the driving units correspond to the complex amplitude modulation units one to one, and the driving units load modulation information to the corresponding complex amplitude modulation units, so as to perform complex amplitude modulation on incident light.
As shown in fig. 2, when each complex amplitude modulation unit 11 includes a phase modulation subunit 101 and an amplitude modulation subunit 102, as shown in fig. 7, step S101 specifically includes:
in step S101a, the phase modulation subunit modulates the phase of the incident light according to the modulation information loaded by the driving unit;
in step S101b, the amplitude modulation subunit modulates the amplitude of the incident light according to the modulation information loaded by the driving unit.
As shown in fig. 2, when each of the driving units 21 includes a first driving subunit 201 and a second driving subunit 202, as shown in fig. 8, step S102 specifically includes:
in step S102a, the first driving sub-element corresponds to a phase modulation sub-element of a complex amplitude modulation unit corresponding to the driving unit, and modulates a phase of incident light by applying phase modulation information to the phase modulation sub-element;
in step S102b, the second driving sub-element corresponds to an amplitude modulation sub-element of the complex amplitude modulation unit corresponding to the driving unit, and amplitude modulation information is loaded to the amplitude modulation sub-element, thereby modulating the amplitude of the incident light.
In practical applications, different steps in each working method provided in the embodiment may be combined to obtain a new technical solution, and the new technical solution also belongs to the protection scope of the present application.
In the method for operating a complex amplitude spatial light modulator provided in this embodiment, a modulation panel of the complex amplitude spatial light modulator is provided with a plurality of complex amplitude modulation units, and the amplitude and the phase of incident light are modulated according to modulation information loaded by a driving unit of a driving device, so that complex amplitude modulation of incident light by a single complex amplitude spatial light modulator is realized, thereby simplifying complex amplitude modulation and modulation steps and reducing the cost of a complex amplitude modulation technique.
It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present application, and that the present application is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the application, and these changes and modifications are to be considered as the scope of the application.
Claims (10)
1. A complex amplitude spatial light modulator comprising a modulation panel comprising a plurality of complex amplitude modulation cells and a driving means comprising a plurality of driving cells;
the complex amplitude modulation unit is used for simultaneously modulating the phase and the amplitude of incident light;
the driving units correspond to the complex amplitude modulation units one to one, and the driving units are used for loading modulation information to the corresponding complex amplitude modulation units so as to perform complex amplitude modulation on incident light.
2. A complex amplitude spatial light modulator as defined in claim 1 wherein each of the complex amplitude modulation cells comprises a phase modulation subunit and an amplitude modulation subunit;
the phase modulation subunit is used for modulating the phase of the incident light according to the modulation information loaded by the driving unit;
the amplitude modulation subunit is used for modulating the amplitude of the incident light according to the modulation information loaded by the driving unit.
3. The complex amplitude spatial light modulator according to claim 2, wherein the modulation panel comprises a first liquid crystal structure array and a first micro-nano structure array, the first liquid crystal structure array comprises a plurality of first liquid crystal structure units, the first micro-nano structure array comprises a plurality of first micro-nano structure units, the first liquid crystal structure units and the first micro-nano structure units are arranged in a one-to-one correspondence manner, and each first liquid crystal structure unit and the corresponding first micro-nano structure unit form one complex amplitude modulation unit;
the first liquid crystal structure unit forms the phase modulation subunit and is used for modulating the phase of incident light according to the modulation information loaded by the driving unit;
the first micro-nano structure unit forms the amplitude modulation subunit and is used for modulating the amplitude of incident light according to the modulation information loaded by the driving unit.
4. The complex amplitude spatial light modulator according to claim 2, wherein the modulation panel comprises a second micro-nano structure array and a third micro-nano structure array, the second micro-nano structure array comprises a plurality of second micro-nano structure units, the third micro-nano structure array comprises a plurality of third micro-nano structure units, the second micro-nano structure units and the third micro-nano structure units are arranged in a one-to-one correspondence manner, and each second micro-nano structure unit and the corresponding third micro-nano structure unit form one complex amplitude modulation unit;
the second micro-nano structure unit forms the phase modulation subunit and is used for modulating the phase of incident light according to the modulation information loaded by the driving unit;
the third micro-nano structure unit forms the amplitude modulation subunit and is used for modulating the amplitude of incident light according to the modulation information loaded by the driving unit.
5. A complex amplitude spatial light modulator as claimed in any one of claims 2 to 4 wherein each of said drive units comprises a first drive sub-element and a second drive sub-element;
the first driving sub-element corresponds to a phase modulation sub-element of a complex amplitude modulation unit corresponding to the driving unit and is used for loading phase modulation information to the phase modulation sub-element so as to modulate the phase of incident light;
the second driving sub-element corresponds to an amplitude modulation sub-element of the complex amplitude modulation unit corresponding to the driving unit, and is configured to load amplitude modulation information to the amplitude modulation sub-element, thereby modulating the amplitude of the incident light.
6. A complex amplitude spatial light modulator as claimed in claim 5 wherein each of said drive units comprises a first electrode and a second electrode;
the first electrode forms the first driving sub-element and is used for changing the voltage of the phase modulation sub-element to load phase modulation information to the phase modulation sub-element so as to modulate the phase of incident light;
the second electrode constitutes the second driving subunit, and is used for changing the voltage of the amplitude modulation subunit to load amplitude modulation information to the amplitude modulation subunit, so that the amplitude of the incident light is modulated.
7. The complex amplitude spatial light modulator of claim 1, wherein the modulation panel comprises a fourth micro-nano structure array comprising a plurality of fourth micro-nano structure units;
the fourth micro-nano structure unit forms the complex amplitude modulation unit and is used for simultaneously modulating the phase and the amplitude of incident light.
8. A method of operating a complex amplitude spatial light modulator, the complex amplitude spatial light modulator comprising a modulation panel and a driving arrangement, the modulation panel comprising a plurality of complex amplitude modulation cells and the driving arrangement comprising a plurality of driving cells, the method comprising:
the complex amplitude modulation unit simultaneously modulates the phase and the amplitude of incident light;
the driving units correspond to the complex amplitude modulation units one to one, and the driving units load modulation information to the corresponding complex amplitude modulation units, so that the incident light is subjected to complex amplitude modulation.
9. The operating method according to claim 8, wherein each of the complex amplitude modulation units comprises a phase modulation subunit and an amplitude modulation subunit, the operating method comprising:
the phase modulation subunit modulates the phase of incident light according to the modulation information loaded by the driving unit;
the amplitude modulation subunit modulates the amplitude of the incident light according to the modulation information loaded by the driving unit.
10. The method of claim 9, wherein each of the drive units includes a first drive sub-element and a second drive sub-element, the method comprising:
the first driving sub-element corresponds to a phase modulation sub-element of a complex amplitude modulation unit corresponding to the driving unit, and phase modulation information is loaded to the phase modulation sub-element, so that the phase of incident light is modulated;
the second drive subunit corresponds to an amplitude modulation subunit of the complex amplitude modulation unit corresponding to the drive unit, and the amplitude modulation subunit is loaded with amplitude modulation information to modulate the amplitude of the incident light.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112859462A (en) * | 2021-01-25 | 2021-05-28 | 西安中科微星光电科技有限公司 | Transmission-reflection integrated liquid crystal light valve |
| CN113671803A (en) * | 2021-08-13 | 2021-11-19 | 暨南大学 | Spatial light field amplitude and phase composite modulation system, method and detection system thereof |
| CN115128849A (en) * | 2022-06-24 | 2022-09-30 | 浙江大学 | Optical wave complex amplitude modulation device |
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