CN112904600A - Large-beam-diameter high-power isolator structure - Google Patents

Abstract

The invention discloses a large-beam-diameter high-power isolator structure, wherein an isolator inner core reflecting component is detachably connected with a light path and is positioned in the light path, a first magnet group is detachably connected with a dustproof cover and is positioned at the top of the dustproof cover, a second magnet group is detachably connected with a second accommodating cavity and is positioned below a first accommodating cavity, and the isolator inner core reflecting component and the light path form a Faraday rotator light path Z-shaped refraction structure, so that the volume of a TGG optically active crystal is reduced, and the cost is saved. By adopting the magnet group, the least magnets generate the strongest and most uniform magnetic field, and the magnet material is saved. The magnetic groups are assembled in an up-and-down array mode, the fixing structure is firm, stable and reliable, the magnetizers are used for guiding the magnetic field, the distribution of the magnetic field is optimized, the structural space is reasonably utilized, the phenomena of magnetic field weakening and demagnetization caused by high temperature are avoided, and the stability of the isolator is improved. The designed core structure scheme is beneficial to the assembly of optical components, is stable and reliable, and can effectively dissipate heat and control temperature.

Description

Large-beam-diameter high-power isolator structure

Technical Field

The invention relates to the technical field of optics, in particular to a large-beam-diameter high-power isolator structure.

Background

In an optical transmission system, the light transmitted in different directions by the end faces of the optical elements causes unstable operation of, for example, a laser device, which greatly shortens the lifetime of the device, or even causes permanent damage to the device. To avoid the effect of the backward light on the device, an optical isolator is often inserted in the optical transmission system. In recent years, the development of high-power fiber lasers and the wide expansion of the high-power fiber lasers in the application of industrial marking, welding, cutting and the like have put higher requirements on the key device of the high-power optical isolator. Under the condition of increasing power requirements, the laser beam itself becomes thicker, so that the large-beam-caliber high-power optical isolation is an important direction for future development. Another key in the design of high power optical isolators is the design and selection of the magnetic field and magnets. The existing high-power isolator has the problems of unstable magnetic field and poor heat dissipation.

Disclosure of Invention

The invention aims to provide a large-beam-caliber high-power isolator structure, and aims to solve the technical problems that a high-power isolator in the prior art is unstable in magnetic field and poor in heat dissipation.

In order to achieve the above object, the present invention provides a large-aperture high-power isolator structure, which includes a high-power isolator, a beam expanding lens, and a collimator assembly, wherein the beam expanding lens is detachably connected to the high-power isolator and is located at one end of the high-power isolator, the collimator assembly is detachably connected to the high-power isolator and is located at the other end of the high-power isolator, the high-power isolator includes a housing, a first adjusting bolt, a magnet sleeve, a first magnet set, a first diaphragm, a dust cover, an isolator kernel reflection assembly, a second magnet set, and a second adjusting bolt, the housing has a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is located above the second accommodating cavity, a light path is located at the bottom of the first accommodating cavity, two ends of the light path penetrate through the housing, and the light path assembly is detachably connected to the first accommodating cavity, and is located at the bottom of the first accommodating cavity, the first diaphragm is detachably connected with the left end of the light path, is located at the left side of the isolator kernel reflection assembly and is communicated with the beam expanding lens, the isolator kernel reflection assembly is detachably connected with the light path and is located inside the light path, the dust cover is detachably connected with the isolator kernel reflection assembly and is located above the isolator kernel reflection assembly, the first magnet group is detachably connected with the dust cover and is located at the top of the dust cover, the magnet sleeve is detachably connected with the dust cover and is located at the top of the dust cover and is sleeved on the magnet group, the first adjusting bolt is detachably connected with the magnet sleeve and is located above the magnet group, the second magnet group is detachably connected with the second accommodating cavity, and the second adjusting bolt is detachably connected with the two magnet groups and is positioned at the bottom of the second magnet group.

Wherein, the isolator kernel reflection assembly comprises two first magnetizers, two reflectors, two polarization beam splitting prisms, two reflection lenses and two optical rotation crystals, the two first magnetizers are respectively detachably connected with the light path and respectively positioned at two sides of the light path, the two reflectors are respectively detachably connected with the corresponding first magnetizers and respectively positioned at the side surfaces of the corresponding first magnetizers, the two reflection lenses are respectively detachably connected with the corresponding reflectors and respectively positioned at the side surfaces of the corresponding reflectors, the two reflection lenses are arranged in a Z shape, two ends of the optical rotation crystals are respectively detachably connected with the two reflection lenses and positioned between the two reflection lenses, the two polarization beam splitting prisms are respectively detachably connected with the light path, and the two optically active crystals are positioned between the two polarization beam splitting prisms, and the other optically active crystal is detachably connected with the light path and positioned at the bottom of the corresponding first magnetizer.

Wherein, the collimator subassembly includes ring flange, second diaphragm, regulation seat and collimator body, the left end of ring flange with the connection can be dismantled to the casing, and is located the casing is kept away from beam expanding lens's one end, the second diaphragm with the connection can be dismantled to the ring flange, and is located the right-hand member of ring flange, adjust the seat with the connection can be dismantled to the second diaphragm, and is located the right side of second diaphragm, the collimator body with adjust the seat and can dismantle the connection, and be located the right side of collimator body, big beam bore high power isolator structure still includes the tail cover, the tail cover with the connection can be dismantled to the casing, and is located the casing is kept away from beam expanding lens's one end, and the cover is located the surface of collimator subassembly.

Wherein, the one end that the collimator subassembly was kept away from to the casing has the drum, the drum with the light path intercommunication, beam expanding lens includes lens slider, biconcave lens, telescope mirror cover, planoconvex lens, lens clamping ring and steel bushing, the right-hand member of lens slider with the inside of drum can be dismantled and be connected, and be located the left side of first diaphragm, biconcave lens with the lens slider can be dismantled and be connected, and be located the left end of lens slider, telescope mirror cover with drum sliding connection, and be located the left end of biconcave lens, and the cover is located the inside of drum, planoconvex lens with telescope mirror cover can be dismantled and be connected, and be located the left end of telescope mirror cover, lens clamping ring can be dismantled with planoconvex lens and be located planoconvex lens's left end, the steel bushing with the drum can be dismantled and be connected, and is sleeved on the outer surface of the cylinder.

The large-beam-caliber high-power isolator structure further comprises a sealing cover and a magnet end cover, the sealing cover is detachably connected with the first accommodating cavity and is located above the first adjusting bolt, and the magnet end cover is detachably connected with the second accommodating cavity and is located below the second adjusting bolt.

The first magnet group and the second magnet group comprise magnets and second magnetizers, the second magnetizers are detachably connected with the magnets and located at one ends, far away from the light path, of the magnets, and the magnets are provided with three magnet bodies.

The large-beam-caliber high-power isolator junction further comprises a third diaphragm, wherein the third diaphragm is detachably connected with the magnet sleeve and is positioned above the light path and on one side of the flange plate, wherein the first accommodating cavity is close to the flange plate.

The invention has the beneficial effects that: the isolator kernel reflection assembly and the optical path form a Faraday rotator optical path refraction structure, the size of the TGG optical rotation crystal is reduced by the Z-shaped folding optical path, the crystal is compositely utilized by the folding of the optical path, and finally the cost is saved. Meanwhile, the magnetic material is saved, the magnetic field distribution is improved, the isolation is improved, the heat dissipation is improved, the thermal birefringence and the thermal lens effect are reduced to a certain degree, and the cost is obviously reduced by folding the optical path. By adopting the first magnet group and the second magnet group, the strongest and most uniform magnetic field is generated by the fewest magnets, and the magnet material is saved. The magnetic groups are assembled in an up-and-down array mode, the fixing structure is firm, stable and reliable, the magnetizers are used for guiding the magnetic field, the distribution of the magnetic field is optimized, the structural space is reasonably utilized, the phenomena of magnetic field weakening and demagnetization caused by high temperature are avoided, and the stability of the isolator is improved. And the distance between the upper magnet group array and the lower magnet group array can be adjusted to change the magnetic field, so that the rotation angle of the TGG optical crystal can be adjusted. Will beam expanding lens with the high power isolator links together, forms big light beam bore high power isolator easily makes in batches, and whole cooperation precision is high, and stable in structure is reliable, and is practical pleasing to the eye. The distance between the biconcave lens and the plano-convex lens can be adjusted, the size of light spots at the light-emitting end can be conveniently adjusted, and the assembly is simple and easy. The designed core structure scheme is beneficial to the assembly of optical components, is stable and reliable, and can effectively dissipate heat and control temperature. The incident light angle of the collimator is set at will, and adjustment is convenient. The third diaphragm is additionally arranged, so that the influence of reverse light on the device is avoided, and the isolation is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a cross-sectional axial view of a large beam aperture high power optical isolator structure of the present invention.

Fig. 2 is an exploded view of the high power isolator of the present invention.

Fig. 3 is an exploded view of the expander lens of the present invention.

FIG. 4 is a schematic diagram of the construction of the reflective component of the isolator core of the present invention.

Fig. 5 is a schematic structural view of a first magnet group of the present invention.

Fig. 6 is a schematic view of the structure of the magnet of the present invention.

Fig. 7 is a schematic view of a portion of the collimator assembly of the present invention.

1-high power isolator, 2-beam expanding lens, 3-collimator assembly, 4-first containing cavity, 5-second containing cavity,

6-tail sleeve, 7-cylinder, 8-sealing cover, 9-magnet end cover, 10-third diaphragm, 11-shell, 12-first adjusting bolt, 13-magnet sleeve, 14-first magnet group, 15-first diaphragm, 16-dust cover, 17-isolator kernel reflection component, 18-second magnet group, 19-second adjusting bolt, 20-lens slide block, 21-biconcave lens, 22-telescopic mirror sleeve, 23-lens press ring, 24-steel sleeve, 25-plano-convex lens, 26-optical path, 27-magnet body, 31-flange plate, 32-second diaphragm, 33-adjusting seat, 34-collimator body, 141-second magnetizer, 142-magnet, 171-first magnetizer, 172-mirror by body, 173-optically active crystal, 174-polarizing beam splitter prism, 175-mirror.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 7, the present invention provides a large-beam-diameter high-power optical isolator structure, including a high-power isolator 1, a beam expanding lens 2, and a collimator assembly 3, where the beam expanding lens 2 is detachably connected to the high-power isolator 1 and is located at one end of the high-power isolator 1, the collimator assembly 3 is detachably connected to the high-power isolator 1 and is located at the other end of the high-power isolator 1, the high-power isolator 1 includes a housing 11, a first adjusting bolt 12, a magnet sleeve 13, a first magnet group 14, a first diaphragm 15, a dust cap 16, an isolator kernel reflection assembly 17, a second magnet group 18, and a second adjusting bolt 19, the housing 11 has a first accommodating cavity 4 and a second accommodating cavity 5, the first accommodating cavity 4 is located above the second accommodating cavity 5, a light path 26 is located at the bottom of the first accommodating cavity 4, the both ends of light path 26 run through casing 11, the light path 26 subassembly with first chamber 4 that holds can dismantle the connection, and be located the bottom of first chamber 4 that holds, first diaphragm 15 with the left end of light path 26 can dismantle the connection, and be located the left side of isolator kernel reflection element 17, and with beam expanding lens 2 intercommunication, isolator kernel reflection element 17 with light path 26 can dismantle the connection, and be located the inside of light path 26, shield 16 with isolator kernel reflection element 17 can dismantle the connection, and be located the top of isolator kernel reflection element 17, first magnet group 14 with shield 16 can dismantle the connection, and be located the top of shield 16, magnet cover 13 with shield 16 can dismantle the connection, and be located the top of shield 16, and the cover is located magnet 142 group, the first adjusting bolt 12 and the magnet sleeve 13 are detachably connected and are positioned above the magnet 142 group, the second magnet group 18 and the second accommodating chamber are detachably connected and are positioned below the first accommodating chamber 4, and the second adjusting bolt 19 and the second magnet 142 group are detachably connected and are positioned at the bottom of the second magnet group 18.

In this embodiment, the isolator core reflection component 17 and the optical path 26 form a refractive structure of the faraday rotator optical path 26, the volume of the TGG optically active crystal 173 is reduced by the Z-type folded optical path 26, and the optical path folding realizes the compound utilization of the crystal, thereby finally saving the cost. Meanwhile, the magnetic material is saved, the magnetic field distribution is improved, the isolation is improved, the heat dissipation is improved, the thermal birefringence and the thermal lens effect are reduced to a certain degree, and the cost is obviously reduced by folding the optical path. With the first magnet group 14 and the second magnet group 18, the strongest and most uniform magnetic field is generated by the fewest magnets, and magnet material is saved. The magnetic groups are assembled in an up-and-down array mode, the fixing structure is firm, stable and reliable, the magnetizers are used for guiding the magnetic field, the distribution of the magnetic field is optimized, the structural space is reasonably utilized, the phenomena of magnetic field weakening and demagnetization caused by high temperature are avoided, and the stability of the isolator is improved. And the distance between the upper magnet group array and the lower magnet group array can be adjusted to change the magnetic field, so that the rotation angle of the TGG optical crystal can be adjusted. Will beam expanding lens 2 with high power isolator 1 links together, forms big beam bore high power isolator easily makes in batches, and whole cooperation precision is high, and stable in structure is reliable, and is practical pleasing to the eye. The distance between the biconcave lens 21 and the plano-convex lens 25 can be adjusted, the size of light spots at the light-emitting end can be conveniently adjusted, and the assembly is simple and easy. The designed core structure scheme is beneficial to the assembly of optical components, is stable and reliable, and can effectively dissipate heat and control temperature. The incident light angle of the collimator body 34 is set arbitrarily, which facilitates adjustment. The third diaphragm 10 is additionally arranged, so that the influence of reverse light on the device is avoided, and the isolation is improved.

Further, the isolator kernel reflection assembly 17 includes two first magnetizers 171, two reflection mirror supporters 172, two polarization beam splitting prisms 174, two reflection lenses 175 and two polarimetric crystals 173, the two first magnetizers 171 are detachably connected with the light path 26 respectively and are located at two sides of the light path 26 respectively, the two reflection mirror supporters 172 are detachably connected with the corresponding first magnetizers 171 respectively and are located at corresponding side surfaces of the first magnetizers 171 respectively, the two reflection lenses 175 are detachably connected with the corresponding reflection mirror supporters 172 respectively and are located at corresponding side surfaces of the reflection mirror supporters 172 respectively, the two reflection lenses 175 are arranged in a Z-shape, two ends of the polarimetric crystals 173 are detachably connected with the two reflection lenses 175 respectively and are located between the two reflection lens 175, the two polarization beam splitters 174 are detachably connected to the optical path 26 and located at the side of the corresponding optically active crystal 173, the two optically active crystals 173 are located between the two polarization beam splitters 174, and the other optically active crystal 173 is detachably connected to the optical path 26 and located at the bottom of the corresponding first magnetizer 171.

In this embodiment, the chiral crystal 173 between the two reflector supporters 172 is TGG chiral crystal, the other chiral crystal 173 is quartz chiral crystal 173, and the existing chiral material is analyzed comparatively, so that Terbium Gallium Garnet (TGG) crystal is used, and the TGG crystal has a larger faraday rotation coefficient in 1064nm band, smaller optical loss, larger optical loss threshold, higher thermal conductivity and good mechanical properties, and is also a good material for manufacturing high-power devices. The quartz optically active crystal 173 has optical characteristics along its optical axis, and does not need to control the included angle between the optical axis and the polarization direction during use, so that the quartz optically active crystal is convenient to install and is not easy to make mistakes. Light enters from the collimator assembly 3 and sequentially passes through the quartz optically active crystal 173 and the TGG optically active crystal, two reflecting mirrors 175 are respectively arranged on one surface of the TGG optically active crystal where the light beam enters and one surface of the TGG optically active crystal where the light beam exits, and the light beam is reflected inside the TGG optically active crystal through the two reflecting mirrors 175 to form a Z-shaped folded light path. The two reflecting mirror pieces 175 and the two reflecting mirrors are integrally fixed by the body 172 and then are placed into the mechanical part in the housing 11, one side of the large surface of the two reflecting mirror pieces 175 is close to the housing 11, so that the accuracy of the reflection angle of the light path 26 is ensured, the small surfaces are aligned with the corresponding magnet groups, the light path 26 is ensured to be capable of striking on the two reflecting mirror pieces 175, and the two reflecting mirror pieces 175 are ensured not to block the light path 26. The two first magnetizers 171 are respectively placed in the corresponding grooves of the shell 11 and locked by countersunk screws from the bottom, and the magnetizers can optimize the magnetic field distribution, guide the magnetic field to the TGG optically active crystal 173 and ensure the balance of the magnetic field of each part of the TGG. Spaces for placing heat-conducting silica gel are designed at the places for placing the crystals, so that the crystals can obtain better heat dissipation conditions. After the crystal is installed, the dust-proof cover 16 is additionally arranged on the upper part of the crystal to protect the inner core part from dust.

Further, the collimator assembly 3 includes a flange 31, a second diaphragm 32, an adjusting seat 33 and a collimator body 34, the left end of the flange 31 is detachably connected to the housing 11, and is located at one end of the shell 11 far away from the beam expanding lens 2, the second diaphragm 32 is detachably connected with the flange 31, and is positioned at the right end of the flange plate 31, the adjusting seat 33 is detachably connected with the second diaphragm 32, and is located at the right side of the second diaphragm 32, the collimator body 34 is detachably connected with the adjusting seat 33, and is located on the right side of the collimator body 34, the structure of the large-beam-diameter high-power isolator 1 further comprises a tail sleeve 6, the tail sleeve 6 is detachably connected with the shell 11, and is located at one end of the shell 11 away from the beam expanding lens 2, and is sleeved on the outer surface of the collimator assembly 3.

In this embodiment, the flange 31 is fixed to the light inlet end of the housing 11 and is fastened by three screws. The collimator body 34 is fixed in an inner hole at one side of the adjusting seat 33 and fixed by glue. One side of the adjusting seat 33 is designed into a spherical structure, the spherical surface is aligned to the edge of the light inlet end of the central hole of the flange plate 31, the adjusting seat 33 can rotate around the spherical center to adjust the incident angle of the collimator body 34, and three screws on the adjusting seat 33 are locked after the angle is adjusted. The tail sleeve 6 is mounted outside the collimator assembly 3, and the tail sleeve 6 is fixed on the shell 11 by screws, so that an adjusting mechanism is protected.

Further, the one end that the collimator subassembly 3 was kept away from to casing 11 has drum 7, drum 7 with light path 26 intercommunication, beam expanding lens 2 includes lens slider 20, biconcave lens 21, telescope cover 22, planoconvex lens 25, lens clamping ring 23 and steel bushing 24, the right-hand member of lens slider 20 with the inside of drum 7 can be dismantled and be connected, and be located the left side of first diaphragm 15, biconcave lens 21 with lens slider 20 can dismantle the connection, and be located the left end of lens slider 20, telescope cover 22 with drum 7 sliding connection, and be located the left end of biconcave lens 21, and the cover is located the inside of drum 7, planoconvex lens 25 with telescope cover 22 can dismantle the connection, and be located the left end of telescope cover 22, lens clamping ring 23 can dismantle with planoconvex lens 25 and be connected, and is positioned at the left end of the plano-convex lens 25, and the steel sleeve is detachably connected with the cylinder 7 and sleeved on the outer surface of the cylinder 7.

In this embodiment, the biconcave lens 21 is first installed in the lens slider 20, fixed with glue, and then placed entirely in the cylinder 7 and locked with a set screw. The plano-convex lens 25 is arranged in the telescopic lens sleeve 22 and is tightly pressed by a pressing ring, and a sealing ring is arranged in the middle of the plano-convex lens. The telescopic mirror sleeve 22 and the shell 11 are matched and positioned by shaft holes, the depth of the telescopic mirror sleeve 22 is adjusted through threads, and the distance from the plano-convex lens 25 to the biconcave lens 21 is controlled to adjust the size of light spots at the light emitting end. After the adjustment, the telescopic lens sleeve 22 is locked by a set screw. And finally, the steel sleeve 24 is sleeved, a sealing ring is arranged between the steel sleeve 24 and the shell 11, and the steel sleeve 24 is screwed and fixed through threads, so that the internal structure is protected.

Further, the structure of the large-beam-diameter high-power isolator 1 further comprises a sealing cover 8 and a magnet 142 end cover 9, wherein the sealing cover 8 is detachably connected with the first accommodating cavity 4 and is located above the first adjusting bolt 12, and the magnet 142 end cover 9 is detachably connected with the second accommodating cavity 5 and is located below the second adjusting bolt 19.

In the present embodiment, the cover 8 and the magnet 142 end cap 9 can protect and prevent dust from entering the housing 11.

Further, the first magnet group 14 and the second magnet group 18 each include a magnet 142 and a second magnetizer 141, the second magnetizer 141 is detachably connected to the magnet 142 and is located at an end of the magnet 142 away from the optical path 26, and the magnet 142 has three magnet bodies 27.

In this embodiment, the first magnet 142 is first installed in the magnet sleeve 13, the magnet 142 of the first magnet group 14 is partially facing outward, the first adjusting bolt 12 is installed in the middle of the magnet sleeve 13, and then the magnet sleeve 13 is integrally installed in the housing 11 and is locked by four cup screws. The second magnet 142 set is directly installed in the second accommodating cavity 5, the same side with the first magnet set 14 in polarity is close to the same side, finally the magnet 142 end cover 9 screwed with the second adjusting bolt 19 is installed, and the magnet 142 end cover 9 is locked by a countersunk head screw. The first magnet group 14 and the second magnet group 18 are installed at the same rotation angle, and the direction of the magnetic field is perpendicular to the light inlet surface and the light outlet surface of the TGG optically active crystal. The magnetic field of the isolator kernel is changed by adjusting the first adjusting bolt 12 and the second adjusting bolt 19 and changing the distance between the first magnet group 14 and the second magnet group 18.

Further, the large-beam-diameter high-power isolator 1 further comprises a third diaphragm 10, wherein the third diaphragm 10 is detachably connected with the magnet sleeve 13, is positioned above the light path 26, and is positioned on one side of the flange plate 31, which is close to the first accommodating cavity 4.

In this embodiment, the first diaphragm 15 and the second diaphragm 32 are small aperture diaphragms, the third diaphragm 10 is an anti-reflection diaphragm, the small aperture diaphragms are installed at the light inlet end of the adjusting seat 33 and the light outlet end of the housing 11, and a very small hole is formed in the middle of the small aperture diaphragms, so that most of the reversely transmitted light can be blocked. A part of the backward transmitted light is transmitted upward through the PBS, and an anti-reflection diaphragm is installed in the light transmitting direction to limit the reflection of the light, and is installed in the magnet housing 13 and fixed by glue. The diaphragm can limit the laser to return along the incident light path 26, is made of ceramic materials and has the effect of absorbing the laser, the influence of reverse light on the device is avoided, and the isolation degree is improved.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. A large-aperture high-power isolator structure is characterized in that,

including high power isolator, beam expanding lens, collimator subassembly, beam expanding lens with the connection can be dismantled to the high power isolator to be located the one end of high power isolator, the collimator subassembly with the connection can be dismantled to the high power isolator, and be located the other end of high power isolator, the high power isolator includes casing, first adjusting bolt, magnet cover, first magnet group, first diaphragm, shield, isolator kernel reflection subassembly, second magnet group and second adjusting bolt, the casing has first chamber and the second chamber that holds, first chamber that holds is located the second holds the top in chamber, the bottom in first chamber that holds has the light path, the both ends of light path run through the casing, the light path subassembly with first chamber that holds can dismantle and be connected to be located the bottom in first chamber that holds, the first diaphragm is detachably connected with the left end of the light path, is positioned on the left side of the isolator kernel reflection assembly and is communicated with the beam expanding lens, the isolator kernel reflection assembly is detachably connected with the light path and is positioned in the light path, the dustproof cover is detachably connected with the isolator kernel reflection assembly and is positioned above the isolator kernel reflection assembly, the first magnet group is detachably connected with the dustproof cover and is positioned at the top of the dustproof cover, the magnet sleeve is detachably connected with the dustproof cover and is positioned at the top of the dustproof cover and is sleeved on the magnet group, the first adjusting bolt is detachably connected with the magnet sleeve and is positioned above the magnet group, the second magnet group is detachably connected with the second accommodating cavity and is positioned below the first accommodating cavity, the second adjusting bolt is detachably connected with the two magnet groups and is positioned at the bottom of the second magnet group.

2. The large beam aperture high power isolator structure of claim 1,

the isolator kernel reflection assembly comprises two first magnetizers, two reflectors, two polarization beam splitting prisms, two reflection lenses and two optical rotation crystals, wherein the two first magnetizers are respectively detachably connected with the light path and are respectively positioned at two sides of the light path, the two reflectors are respectively detachably connected with the corresponding first magnetizers and are respectively positioned at the side surfaces of the corresponding first magnetizers, the two reflection lenses are respectively detachably connected with the corresponding reflectors and are respectively positioned at the side surfaces of the corresponding reflectors, the two reflection lenses are arranged in a Z shape, two ends of the optical rotation crystals are respectively detachably connected with the two reflection lenses and are positioned between the two reflection lenses, the two polarization beam splitting prisms are respectively detachably connected with the light path and are positioned at the side surfaces of the corresponding optical rotation crystals, and the two optically active crystals are positioned between the two polarization beam splitting prisms, and the other optically active crystal is detachably connected with the light path and positioned at the bottom of the corresponding first magnetizer.

3. The large beam aperture high power isolator structure of claim 1,

collimator subassembly includes ring flange, second diaphragm, regulation seat and collimator body, the left end of ring flange with the connection can be dismantled to the casing, and is located the casing is kept away from beam expanding lens's one end, the second diaphragm with the connection can be dismantled to the ring flange, and is located the right-hand member of ring flange, adjust the seat with the connection can be dismantled to the second diaphragm, and is located the right side of second diaphragm, the collimator body with adjust the seat and can dismantle the connection, and be located the right side of collimator body, big beam bore high power isolator structure still includes the tail cover, the tail cover with the connection can be dismantled to the casing, and is located the casing is kept away from beam expanding lens's one end, and the cover is located collimator subassembly's surface.

4. The large beam aperture high power isolator structure of claim 1,

an end of the housing remote from the collimator assembly has a cylinder in communication with the light path, the beam expanding lens comprises a lens sliding block, a biconcave lens, a telescopic lens sleeve, a plano-convex lens, a lens pressing ring and a steel sleeve, the right end of the lens sliding block is detachably connected with the inside of the cylinder, and is positioned at the left side of the first diaphragm, the biconcave lens is detachably connected with the lens sliding block, and is positioned at the left end of the lens sliding block, the telescopic lens sleeve is connected with the cylinder in a sliding way and is positioned at the left end of the biconcave lens, and is sleeved in the cylinder, the plano-convex lens is detachably connected with the telescopic lens sleeve, and the lens pressing ring is detachably connected with the plano-convex lens and is positioned at the left end of the plano-convex lens, and the steel sleeve is detachably connected with the cylinder and sleeved on the outer surface of the cylinder.

5. The large beam aperture high power isolator structure of claim 1,

the large-beam-diameter high-power isolator structure further comprises a sealing cover and a magnet end cover, the sealing cover is detachably connected with the first accommodating cavity and is located above the first adjusting bolt, and the magnet end cover is detachably connected with the second accommodating cavity and is located below the second adjusting bolt.

6. The large beam aperture high power isolator structure of claim 1,

first magnet group with second magnet group all includes magnet and second magnetizer, the second magnetizer with magnet can dismantle the connection, and is located magnet is kept away from the one end of light path, magnet has three magnet body.

7. A large beam aperture high power isolator structure as in claim 3,

the large-beam caliber high-power isolator junction further comprises a third diaphragm, wherein the third diaphragm is detachably connected with the magnet sleeve and is positioned above the light path and on one side of the flange plate, wherein the first accommodating cavity is close to the flange plate.

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