CN115373164A - Laser unidirectional modulation transmission device - Google Patents
Laser unidirectional modulation transmission device Download PDFInfo
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- CN115373164A CN115373164A CN202211077755.2A CN202211077755A CN115373164A CN 115373164 A CN115373164 A CN 115373164A CN 202211077755 A CN202211077755 A CN 202211077755A CN 115373164 A CN115373164 A CN 115373164A
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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
- G02F1/11—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 acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves
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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
- G02F1/09—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 magneto-optical elements, e.g. exhibiting Faraday effect
- G02F1/093—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 magneto-optical elements, e.g. exhibiting Faraday effect used as non-reciprocal devices, e.g. optical isolators, circulators
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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
- G02F1/11—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 acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves
- G02F1/113—Circuit or control arrangements
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The application provides a one-way modulation transmission device of laser is applied to the laser instrument system, and the device includes: the device comprises a tube shell, a first collimator and a second collimator, wherein the two opposite ends of the tube shell are respectively communicated with the first collimator and the second collimator; the acousto-optic modulation component and the optical isolation component are arranged in the tube shell, the acousto-optic modulation component comprises an acousto-optic crystal, and the optical isolation component comprises at least one half-wave plate, at least one Faraday plate, a first birefringent crystal and a second birefringent crystal; the acousto-optic crystal, the first birefringent crystal, one of the half-wave plates, one of the Faraday plates and the second birefringent crystal are sequentially arranged along the optical path direction of the device. In the device, the collimated light beam that obtains through first collimator obtains the modulation after the diffraction effect through the acousto-optic crystal, and light isolation component can guarantee in the device from the second collimator to light isolation component transmission's reverse light can not enter into first collimator to preceding stage component in to the laser system forms the protection.
Description
Technical Field
The application relates to the technical field of laser modulation, in particular to a laser unidirectional modulation transmission device.
Background
With the development of laser technology, laser systems are widely applied to various fields due to the advantages of simple structure, small size, low cost, good temperature stability, capability of working in severe working environments and the like. For a laser system, it is usually required to freely control parameters such as the output power range, the single pulse energy, and the frequency of the laser, so the laser generated by the seed source in the laser system needs to be further modulated by the modulation device.
However, since the laser generated by the seed source is still in a bidirectional transmission state after being modulated by the existing modulation device, the backward light is easy to damage the preceding optical element in the seed source, so that a device for filtering the backward light needs to be additionally arranged in the laser system, and the integration degree in the laser system is reduced and the signal loss becomes high.
Disclosure of Invention
The application provides a laser unidirectional modulation transmission device, which aims to at least solve one of the technical problems in the related art.
In order to solve the above problem, the present application provides a unidirectional laser modulation transmission apparatus, which is applied in a laser system, and the apparatus includes: the device comprises a tube shell, a first collimator and a second collimator, wherein the two opposite ends of the tube shell are respectively communicated with the first collimator and the second collimator; the acousto-optic modulation component and the optical isolation component are arranged in the tube shell, the acousto-optic modulation component comprises an acousto-optic crystal, and the optical isolation component comprises at least one half-wave plate, at least one Faraday plate, a first birefringent crystal and a second birefringent crystal; the acousto-optic crystal, the first birefringent crystal, one of the half-wave plates, one of the Faraday plates and the second birefringent crystal are sequentially arranged along the optical path direction of the device.
The acousto-optic modulation component also comprises a sound absorber and a transducer, wherein the sound absorber and the transducer are arranged on two opposite sides of the acousto-optic crystal along the direction vertical to the light path direction; the energy converter is connected with a radio frequency connector arranged on the side wall of the tube shell through a metal electrode wire, and the radio frequency connector is used for being externally connected with a driving circuit.
Wherein the optical isolation component further comprises a magnetic ring, and the first birefringent crystal, the at least one half-wave plate, the at least one Faraday plate, and the second birefringent crystal are embedded in the magnetic ring.
And a filter is further arranged on the magnetic ring and positioned between the second birefringent crystal and the second collimator.
The magnetic ring is in an omega shape and is fixed at the bottom of the tube shell in a bonding mode.
The number of the half-wave plates and the number of the Faraday plates are both 2, the optical isolation component further comprises a third birefringent crystal and a fourth birefringent crystal which are embedded into the magnetic ring, and the third birefringent crystal and the fourth birefringent crystal are sequentially arranged between the first birefringent crystal and the second birefringent crystal along the optical path direction; one of the half-wave plate and one of the Faraday plates are sequentially disposed between the first birefringent crystal and the third birefringent crystal in the optical path direction, and the other of the half-wave plate and the Faraday plate is sequentially disposed between the fourth birefringent crystal and the second birefringent crystal in the optical path direction.
The laser system is provided with a resonant cavity, and the laser unidirectional modulation transmission device is used for modulating laser emitted from the resonant cavity.
The device further comprises a first sleeve and a second sleeve which are arranged outside the tube shell, wherein the first sleeve and the second sleeve are respectively sleeved on the parts of the first collimator and the second collimator which are distributed outside the tube shell.
Wherein the acousto-optic crystal comprises one of a tellurium dioxide crystal, a quartz crystal and fused quartz.
Wherein the transducer is a piezoelectric crystal.
The beneficial effect of this application does: different from the prior art, in the laser unidirectional modulation transmission device provided by the application, the acousto-optic modulation component and the optical isolation component are arranged in the tube shell, so that collimated light beams obtained by the first collimator sequentially pass through the acousto-optic crystal, the first birefringent crystal, one of the half-wave plates, one of the Faraday plates and the second birefringent crystal in the tube shell along the optical path direction of the device, and then are coupled into the second collimator and output outwards; collimated light beam obtains the modulation after acousto-optic crystal's diffraction effect, and light isolation component can guarantee in the device from the second collimater to light isolation component transmission's reverse light can not enter into first collimater, in order to form the protection to preceding stage component in the laser instrument system, consequently the device in this application has realized the integration of laser modulation and reverse light isolation function, make light beam unidirectional modulation transmission in the device, and make the integrated level in the laser instrument system improve and signal loss reduce.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the embodiments according to the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
Fig. 1 is a schematic top view of a laser unidirectional modulation transmission device provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of a side view of an optical isolation assembly according to an embodiment of the present disclosure;
FIG. 3A is a schematic diagram of the forward optical path in the isolation assembly of FIG. 2;
FIG. 3B is a schematic view of the reverse optical path in the isolation assembly of FIG. 2;
fig. 4 is a schematic side view of another isolation assembly provided in the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. To simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
Referring to fig. 1, fig. 1 is a schematic top view of a laser unidirectional modulation transmission apparatus applied to a laser system according to an embodiment of the present disclosure, and as shown in fig. 1, the apparatus includes a package 3, an acousto-optic modulation component, and an optical isolation component. The opposite ends of the tube housing 3 are respectively connected with a first collimator 1 and a second collimator 16. An acousto-optic modulation component and an optical isolation component are arranged on the tube shell 3, and the acousto-optic modulation component comprises an acousto-optic crystal 5. Referring to fig. 2, fig. 2 is a schematic side view of an optical isolation element according to an embodiment of the present application, and as shown in fig. 2, the optical isolation element includes at least one half-wave plate 12, at least one faraday plate 13, a first birefringent crystal 11, and a second birefringent crystal 14. The acousto-optic crystal 5, the first birefringent crystal 11, one of the half-wave plates 12, one of the Faraday plates 13 and the second birefringent crystal 14 are sequentially arranged along the optical path direction of the device.
Specifically, a seed source (not shown in the figure) and a resonant cavity (not shown in the figure) are arranged in the laser system, and light generated by the seed source passes through the resonant cavity and outputs laser outwards under the action of the resonant cavity. The resonant cavity is used for selecting light with a certain frequency and consistent direction for the most preferential amplification, and suppressing light with other frequencies and directions. Any photon which does not move along the axis of the resonant cavity quickly escapes from the cavity and is not in contact with the activation medium any more. The photons moving along the axis will continue to move forward in the cavity and will continuously move back and forth to generate oscillation by reflection of the two mirrors arranged in the cavity, and meet the excited particles to generate excited radiation during operation, the photons moving along the axis will continuously proliferate to form laser beams with the same propagation direction, frequency and phase in the cavity, and the laser beams propagate from the output end of the resonant cavity to the first collimator 1 along the optical fiber. The first collimator 1 is used to convert the laser beam propagating in the optical fiber into a collimated beam, and the collimated beam is incident into the acousto-optic crystal 5 along the optical path direction of the device, which is shown as the x direction in fig. 1, and the forward direction of the optical path direction may be defined as from the first collimator 1 to the second collimator 16 along the x direction, and the reverse direction of the optical path direction may be defined as from the second collimator 16 to the first collimator 1 along the x direction.
The refractive index of the acousto-optic crystal 5 can be changed periodically under certain conditions, so that a grating is formed, when the collimated light beam output from the first collimator 1 passes through the acousto-optic crystal 5 forming the grating, interaction is generated, so that the collimated light beam forms diffracted light after undergoing Bragg diffraction, and the diffracted light irradiates to the optical isolation component. Wherein, the acousto-optic crystal 5 comprises one of tellurium dioxide crystal, quartz crystal and fused quartz.
In the present embodiment, the characteristics of the acousto-optic crystal 5 can be used to implement, for example, modulation of continuous laser to form pulse laser, frequency reduction of ultrafast seed laser, menu application, and pulse width modulation application of pulse laser. When the diffracted light beams sequentially pass through the first birefringent crystal 11, one of the half-wave plates 12, and one of the faraday plates 13, the second birefringent crystal 14 provided in the optical isolation assembly, the forward light transmission and reverse optical isolation effects as shown in fig. 3A and 3B can be achieved.
Specifically, as shown in fig. 3A, when a light beam is incident into the first birefringent crystal 11 in the forward direction of the optical path direction, the light beam is divided into o light and e light due to the birefringence. The included angles between the incident surface and the exit surface of the first birefringent crystal 11 and the z direction are both 5.7 degrees, and the optical axis is 47.8 degrees, so that the e light and the o light are respectively transmitted symmetrically along the central axis in the upper direction and the lower direction due to different refractive indexes. An included angle between the optical axis of the half-wave plate 12 and the vertical direction is 22.5 degrees, e light passes through the half-wave plate 12, rotates forward by 45 degrees, passes through the Faraday plate 13, continues to rotate forward by 45 degrees, and is incident into the second birefringent crystal 14 to be changed into o light. The o light passes through the half-wave plate 12, rotates 45 degrees in the forward direction, passes through the Faraday plate 13, continues to rotate 45 degrees in the forward direction, and is incident into the second birefringent crystal 14 to become e light. The included angles between the incident surface and the exit surface of the second birefringent crystal 14 and the z direction are both 5.7 degrees, and the optical axis is 47.8 degrees. Because of different refractive indexes, the o light and the e light are symmetrically transmitted along the central axis in two directions, namely downward direction and upward direction, and the two light beams are converged at the emergent surface of the second birefringent crystal 14, combined into one light beam and then coupled into the second collimator 16.
When there is a backward light beam input from the second collimator 16 into the second birefringent crystal 14, the o and e light are symmetrically transmitted along the central axis in both upward and downward directions, respectively, due to the difference in refractive index, as shown in fig. 3B. The o light passes through the Faraday plate 13, rotates 45 degrees in the forward direction, passes through the half-wave plate 12, rotates 45 degrees in the reverse direction, and is still o light when entering the first birefringent crystal 11. The e light passes through the Faraday plate 13, rotates 45 degrees in the forward direction, passes through the half-wave plate 12, rotates 45 degrees in the reverse direction, and is still the e light when entering the first birefringent crystal 11. Therefore, the o light and the e light are transmitted symmetrically along the central axis in the first birefringent crystal 11 in the upward and downward directions respectively, are further away from each other, and cannot enter the optical path, so that the effect of reverse isolation is realized.
Therefore, in the unidirectional laser modulation transmission device provided in this embodiment, when laser light is incident from the first collimator 1 to the acousto-optic crystal 5 in the acousto-optic modulation component, corresponding diffracted light is obtained through the action of the acousto-optic crystal 5, that is, the laser light is modulated at this time, and then the diffracted light is coupled into the second collimator 16 through the first birefringent crystal 11, one of the half-wave plates 12, one of the faraday plates 13 and the second birefringent crystal 14 which are arranged in the optical isolation component in sequence along the optical path direction, and due to the mutual matching among the components of the optical isolation component, the backward light existing in the optical path cannot be incident from the second collimator 16 to the first collimator 1 through the optical isolation component, so that the pre-stage optical elements in the laser system can be protected. In this embodiment, through setting up acousto-optic crystal 5 and optical isolation subassembly integration in tube 3 for 11 first birefraction crystal from optical isolation subassembly can directly receive the modulated light of outgoing from acousto-optic crystal 5, and acousto-optic modulation subassembly output modulated light or optical isolation subassembly receipt modulated light also do not need to utilize collimater and optic fibre, thereby reduced the use of collimater and optic fibre, it is corresponding, reduced the insertion loss that welding loss and collimater that optic fibre brought and inserted loss.
In addition, because the light beam continuously travels back and forth to generate oscillation in the resonant cavity arranged in the laser system, a certain amount of backward light needs to be present in the resonant cavity, and the light beam can only obtain forward light propagating in a single direction after being acted by the device in the embodiment, so the device in the embodiment is specifically arranged outside the resonant cavity and used for the single-direction modulation transmission of the laser beam.
With continued reference to fig. 1, the acousto-optic modulation assembly further includes a sound absorber 6 and a transducer 7, and the sound absorber 6 and the transducer 7 are disposed on opposite sides of the acousto-optic crystal 5 along a direction perpendicular to the optical path direction (i.e., the y direction in fig. 1). The transducer 7 is connected via a metal electrode line 8 to a radio-frequency connection (not shown) provided on the side wall of the housing 3, which radio-frequency connection is used for external connection to a drive circuit 9.
In particular, the transducer 7 is a piezoelectric crystal. The transducer 7 is coated with a gold layer on one side. This transducer 7 loops through metal electrode line 8 and the radio frequency connects the signal of telecommunication that receives drive circuit 9 and export, and this transducer 7 arouses the sound wave of certain frequency after receiving the signal of telecommunication, and when the sound wave that corresponds leads to the side of acousto-optic crystal 5 conducts in acousto-optic crystal 5, can produce the elastic force in acousto-optic crystal 5 to the refracting index that makes acousto-optic crystal 5 through the acousto-optic effect changes. The sound absorber 6 is used to absorb unwanted sound waves. The transducer 7 and the sound absorber 6 are both arranged on the non-light-transmitting surface of the acousto-optic crystal 5, so that the transducer 7 and the sound absorber 6 do not form a barrier to the transmission of light beams in the device.
In this embodiment, the apparatus further comprises a crystal mount 4, the crystal mount 4 being fixed to the bottom of the package 3 for carrying the acousto-optic modulation component. Specifically, the crystal base 4 is fixed on the bottom of the tube shell 3 through a screw, the acousto-optic crystal 5 is fixed on the crystal base 4 in a bonding mode, the sound absorber 6 is fixed on one side of the acousto-optic crystal 5 in a bonding mode, and the transducer 7 is fixed on the other side face of the acousto-optic crystal 5 in a pressing mode and is arranged opposite to the sound absorber 6. One end of the metal electrode wire 8 is connected to the side surface of the transducer 7 plated with the gold layer in a gold wire bonding mode, and the other end is connected with the radio frequency connector fixed on the inner side wall of the tube shell 3. Furthermore, the crystal base 4 is provided with an edge (not shown in the figure) with a height of 1mm, and the acousto-optic crystal 5 is placed against the edge.
Referring to fig. 2, as shown in fig. 2, the optical isolation component further includes a magnetic ring 10, and the first birefringent crystal 11, the at least one half-wave plate 12, the at least one faraday plate 13, and the second birefringent crystal 14 are embedded in the magnetic ring 10. Wherein, the shape of this magnetic ring 10 is omega shape, and this magnetic ring 10 pastes the bottom at tube shell 3 through the mode of gluing. The first birefringent crystal 11, one of the half-wave plates 12, one of the Faraday plates 13 and the second birefringent crystal 14 are sequentially arranged and fixed inside the magnetic ring 10 in an adhesive bonding mode. Specifically, the magnetic ring 10 is a samarium cobalt magnet or a neodymium iron boron magnet.
Referring to fig. 1, a filter 15 is further disposed on the magnetic ring 10, and the filter 15 is located between the second birefringent crystal 14 and the second collimator 16. Specifically, the filter plate 15 is tightly attached to the magnetic ring 10 and is centrally connected to the magnetic ring 10 in an adhesive manner. The filter 15 is used to filter out Amplifier spontaneous emission noise ASE (Amplifier spontaneous emission noise) noise in the beam coming out from the optical isolation component. The filtered ASE noise beam is then incident into the second collimator 16, collimated by the second collimator 16, and transmitted out of the device system.
Referring to fig. 4, fig. 4 is a schematic side view of another isolation device according to an embodiment of the present disclosure. As shown in fig. 4, the present application further provides a bipolar type isolation component, which is different from the unipolar type isolation component shown in fig. 2, wherein the number of the half-wave plate 12 and the faraday plate 13 is 2, the isolation component further includes a third birefringent crystal 18 and a fourth birefringent crystal 19 embedded in the magnetic ring 10, and the third birefringent crystal 18 and the fourth birefringent crystal 19 are sequentially disposed between the first birefringent crystal 11 and the second birefringent crystal 14 along the optical path direction. One of the half-wave plate 12 and one of the faraday plates 13 are disposed between the first birefringent crystal 11 and the third birefringent crystal 18 in the optical path direction in this order, and the other of the half-wave plate 12 and the other of the faraday plates 13 are disposed between the fourth birefringent crystal 19 and the second birefringent crystal 14 in the optical path direction in this order. Specifically, the material of the first/second/third/fourth birefringent crystal may be lithium niobate or yttrium vanadate.
The device further comprises a first sleeve 2 and a second sleeve 17 which are arranged outside the tube shell 3, wherein the first sleeve 2 and the second sleeve 17 are respectively sleeved on the parts of the first collimator 1 and the second collimator 16 which are distributed outside the tube shell 3. The first sleeve 2 and the second sleeve 17 are used to provide mechanical protection to the first collimator 1 and the second collimator 16, respectively, from damage.
In the laser unidirectional modulation transmission device provided by the application, an acousto-optic modulation component and an optical isolation component are arranged in a tube shell, so that collimated light beams obtained by a first collimator sequentially pass through an acousto-optic crystal, the first birefringent crystal, one of the half-wave plates, one of the Faraday plates and the second birefringent crystal in the tube shell along the light path direction of the device, and then are coupled into a second collimator and output outwards; collimated light beam obtains the modulation after acousto-optic crystal's diffraction effect, and light isolation component can guarantee in the device from the second collimater to light isolation component transmission's reverse light can not enter into first collimater, in order to form the protection to preceding stage component in the laser instrument system, consequently the device in this application has realized the integration of laser modulation and reverse light isolation function, make light beam unidirectional modulation transmission in the device, and make the integrated level in the laser instrument system improve and signal loss reduce.
In addition to the above embodiments, other embodiments are also possible. All technical solutions formed by using equivalents or equivalent substitutions fall within the protection scope of the claims of the present application.
In summary, although the preferred embodiments have been disclosed, the above-mentioned preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, therefore, the scope of the present application is defined by the appended claims.
Claims (10)
1. A unidirectional laser modulation transmission device, which is applied to a laser system, is characterized in that the device comprises:
the device comprises a tube shell, a first collimator and a second collimator, wherein the two opposite ends of the tube shell are respectively communicated with the first collimator and the second collimator;
the acousto-optic modulation component and the optical isolation component are arranged in the tube shell, the acousto-optic modulation component comprises an acousto-optic crystal, and the optical isolation component comprises at least one half-wave plate, at least one Faraday plate, a first birefringent crystal and a second birefringent crystal;
the acousto-optic crystal, the first birefringent crystal, one of the half-wave plates, one of the Faraday plates and the second birefringent crystal are sequentially arranged along the optical path direction of the device.
2. The unidirectional laser modulation transmission device of claim 1, wherein the acousto-optic modulation assembly further comprises a sound absorber and a transducer, and the sound absorber and the transducer are arranged on two opposite sides of the acousto-optic crystal along a direction perpendicular to the optical path direction;
the energy converter is connected with a radio frequency connector arranged on the side wall of the tube shell through a metal electrode wire, and the radio frequency connector is used for being externally connected with a driving circuit.
3. The laser unidirectional modulation transmission apparatus of claim 1, wherein the optical isolation component further comprises a magnetic ring, and the first birefringent crystal, the at least one half-wave plate, the at least one faraday plate, and the second birefringent crystal are embedded in the magnetic ring.
4. The unidirectional laser modulation transmission device as claimed in claim 3, wherein a filter is further disposed on the magnetic ring, and the filter is located between the second birefringent crystal and the second collimator.
5. The unidirectional laser modulation transmission device as claimed in claim 3, wherein the magnetic ring is in the shape of Ω, and is fixed on the bottom of the tube shell by adhesion.
6. The device for unidirectional laser modulation transmission according to claim 3, wherein the number of the half-wave plates and the number of the Faraday plates are both 2, the optical isolation assembly further comprises a third birefringent crystal and a fourth birefringent crystal embedded in the magnetic ring, and the third birefringent crystal and the fourth birefringent crystal are sequentially arranged between the first birefringent crystal and the second birefringent crystal along the optical path direction;
one of the half-wave plate and one of the Faraday plates are sequentially disposed between the first birefringent crystal and the third birefringent crystal in the optical path direction, and the other of the half-wave plate and the Faraday plate is sequentially disposed between the fourth birefringent crystal and the second birefringent crystal in the optical path direction.
7. The unidirectional laser modulation transmission device of claim 1, wherein a resonant cavity is disposed in the laser system, and the unidirectional laser modulation transmission device is configured to modulate laser light emitted from the resonant cavity.
8. The apparatus of claim 1, further comprising a first sleeve and a second sleeve disposed outside the tube housing, wherein the first sleeve and the second sleeve are respectively sleeved on the portions of the first collimator and the second collimator distributed outside the tube housing.
9. The laser unidirectional modulation transmission device of claim 1, wherein the acousto-optic crystal comprises one of a tellurium dioxide crystal, a quartz crystal and fused quartz.
10. The laser unidirectional modulation transmission device of claim 2, wherein the transducer is a piezoelectric crystal.
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| CN202211077755.2A CN115373164A (en) | 2022-09-05 | 2022-09-05 | Laser unidirectional modulation transmission device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115664518A (en) * | 2022-12-28 | 2023-01-31 | 中国科学院长春光学精密机械与物理研究所 | Unidirectional lead-in equipment and unidirectional lead-in system based on space laser transmission |
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2022
- 2022-09-05 CN CN202211077755.2A patent/CN115373164A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115664518A (en) * | 2022-12-28 | 2023-01-31 | 中国科学院长春光学精密机械与物理研究所 | Unidirectional lead-in equipment and unidirectional lead-in system based on space laser transmission |
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