CN112234427B - Crystal switching device suitable for optical parametric oscillator - Google Patents
Crystal switching device suitable for optical parametric oscillator Download PDFInfo
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- CN112234427B CN112234427B CN202011147551.2A CN202011147551A CN112234427B CN 112234427 B CN112234427 B CN 112234427B CN 202011147551 A CN202011147551 A CN 202011147551A CN 112234427 B CN112234427 B CN 112234427B
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- 239000013078 crystal Substances 0.000 title claims abstract description 94
- 230000003287 optical effect Effects 0.000 title claims abstract description 50
- 230000005540 biological transmission Effects 0.000 claims abstract description 43
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 238000000926 separation method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 2
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000019837 monoammonium phosphate Nutrition 0.000 description 2
- 235000019796 monopotassium phosphate Nutrition 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- PILOURHZNVHRME-UHFFFAOYSA-N [Na].[Ba] Chemical compound [Na].[Ba] PILOURHZNVHRME-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
- GNSKLFRGEWLPPA-ZSJDYOACSA-M potassium;dideuterio phosphate Chemical compound [K+].[2H]OP([O-])(=O)O[2H] GNSKLFRGEWLPPA-ZSJDYOACSA-M 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/1083—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering using parametric generation
-
- 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
- G02F1/35—Non-linear optics
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
-
- 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
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a crystal switching device suitable for an optical parametric oscillator, which comprises a switching disc, a transmission disc, a connecting piece and a positioning device, wherein the switching disc and the transmission disc are coaxially arranged on a fixed shaft, the switching disc is positioned above the transmission disc, the switching disc is provided with a plurality of sub-discs, the sub-discs are not overlapped, the outer edge of each sub-disc is provided with the connecting piece, the free end of the connecting piece is provided with a positioning hole, the rotating of the transmission disc drives the sub-discs of the switching disc to rotate to the positioning device and stop, and the positioning device extends out of the positioning shaft to complete positioning combination with the positioning holes, so that a crystal fixed by the connecting piece on each sub-disc is switched. The invention can automatically switch the standby crystal in the laser system and ensure the continuous operation of the oscillator.
Description
Technical Field
The invention relates to the technical field of optical parametric oscillators, in particular to a crystal switching device suitable for the optical parametric oscillator.
Background
An optical parametric oscillator mainly comprises two key parts: an optical resonator and a nonlinear optical crystal. The optical cavity is primarily intended to resonate with at least one of the two output lights. In the nonlinear optical crystal, the pump light, the signal light, and the idler light coincide with each other. The interaction of the three different frequency lights results in amplitude gain (parametric amplification) of the signal and idler waves and corresponding pump amplitude attenuation. The gain causes the resonant light wave (signal light or idler light or both) to oscillate in the cavity, compensating for the loss of the resonant light wave in oscillating back and forth. The losses include losses associated with the output coupling mirror extracting the desired output light wave. Because the loss is independent of the pump intensity, but the gain is dependent on the pump intensity, insufficient gain is not sufficient to support oscillation at low pump powers. Oscillation only occurs when the pump power reaches a certain threshold. Above the threshold power, the gain also depends on the amplitude of the resonant light wave. Therefore, in steady state operation, the amplitude of the resonant light wave depends on the state where the gain and the loss (a constant) are equal. The amplitude of the resonant wave and the intensity of the output light wave both increase with increasing pump light intensity. Common second-order nonlinear optical crystals include potassium dihydrogen phosphate (KDP), Ammonium Dihydrogen Phosphate (ADP), potassium dideuterium phosphate (KD x P), barium sodium niobate, etc. In order to change the frequency of the output light wave, the pump frequency or the nonlinear optical crystal with phase matching characteristic can be changed. The latter is achieved by changing the temperature or orientation of the nonlinear crystal or the period of quasi-phase matching.
During the use of nonlinear crystals, excessively high light intensities can momentarily damage the crystals, and unfortunately, to achieve sufficiently high conversion efficiencies, nonlinear crystals often need to be operated near their optical loss threshold. Even if the crystal is operated well below the threshold to prevent transient losses, some crystal materials exhibit sustained degradation, for example in the form of "grey tracking", in some parts of use. This phenomenon is particularly common when the crystal is operated in the ultraviolet band. Gradual degradation accumulates heat, and the generation of excessive heat can cause catastrophic damage instantaneously. In addition, hygroscopic crystal materials need to be kept in sufficiently dry air (or dry inert gas), and it is advantageous to keep such crystals operating at a higher temperature. Crystal operating temperatures below room temperature are often problematic, and in the event that the air is not dry enough, moisture in the air can condense on the crystal surface, focusing the laser more, and damaging the crystal.
In order to generate high power uv light, the nonlinear crystals become consumables, which need to be replaced frequently during the lifetime of the laser system, but temporary replacement of the crystals in the laser system is cumbersome and time-consuming.
Disclosure of Invention
The invention aims to provide a crystal switching device suitable for an optical parametric oscillator, which can automatically switch a standby crystal in a laser system and ensure the endurance operation of the oscillator.
The technical scheme adopted by the invention for solving the technical problems is that the crystal switching device suitable for the optical parametric oscillator comprises a switching disc, a transmission disc, a connecting piece and a positioning device, wherein the switching disc and the transmission disc are coaxially arranged on a fixed shaft, the switching disc is positioned above the transmission disc, the switching disc is provided with a plurality of sub-discs, the sub-discs are not overlapped, the connecting piece is arranged on the outer edge of each sub-disc, a positioning hole is formed in the free end of the connecting piece, the transmission disc is rotated to drive the sub-discs of the switching disc to rotate to the positioning device and stop, and the positioning device extends out of the positioning shaft to be positioned and combined with the positioning hole, so that the crystal fixed by the connecting piece on each sub-disc is switched.
Furthermore, the sub-disc comprises a rotating ring and a clamping ring, the clamping ring is arranged in a center hole of the rotating ring, the fixed shaft is provided with a positioning ring, and the clamping ring is clamped in the positioning ring, so that the clamping ring is rotatably connected with the fixed shaft.
Furthermore, the sub-disc also comprises connecting sub-discs, the thickness of each connecting sub-disc is consistent, the thickness of each rotating ring is consistent with that of one connecting sub-disc, the rotating rings are positioned at the fixedly connected positions on the connecting sub-discs in a staggered mode, so that when all the rotating rings are sequentially sleeved on the fixed shaft, all the connecting sub-discs are sequentially arranged on the transmission disc and are not overlapped.
Furthermore, the separating device further comprises a separating disc, the separating disc is fixed in position and used for determining a rotation starting point and a rotation stopping point of the separating disc, a concave ring is arranged on the separating disc, and the concave ring is sleeved outside the rotating ring and does not influence the rotation of the rotating ring.
Furthermore, be provided with the spacing groove on the minute dish, the spacing groove sets up on the symmetry line of minute dish, the connecting portion rigid coupling of connecting piece is in the spacing inslot, makes the connecting piece all the time with minute dish keeps the vertical state.
Furthermore, the crystal fixing device further comprises an adapter, the upper end of the adapter is used for fixing the crystal, the lower end of the adapter is inserted into the insertion hole of the connecting piece, and the connecting piece can be replaced at any time.
Furthermore, the lower extreme of adaptor is provided with the locating part, the grafting hole fit in the locating part is provided with spacing hole, makes when the adaptor is pegged graft in the grafting hole, thereby the locating part can with thereby spacing hole cooperation is fixed the relative position of adaptor.
Furthermore, the lower end of the adapter is provided with a threaded portion, and the threaded portion is matched with the fixing piece for use, so that the adapter can be fixed on the connecting piece.
Furthermore, the connecting piece still includes the portion of restrainting, the locating hole is located the central point of the portion of restrainting, the front end of location axle is provided with smooth portion, works as smooth portion with during the portion's butt of restrainting, can slide in the locating hole, make the location axle with the locating hole is accomplished and is combined, is fixed a position.
Further, the driving device is further included, a driving shaft of the driving device is meshed with the outer side wall of the transmission disc, so that the driving device can drive the transmission disc, and a stopping portion is arranged on the outer side wall of the transmission disc and used for stopping the driving shaft.
The invention has the beneficial effects that:
1. the mounting position of the nonlinear optical crystal in the oscillator is provided with a positioning device, the switching disc is provided with a connecting piece for fixing the crystal, the switching disc is rotated to rotate the sub-disc fixed with the standby crystal to the mounting position of the crystal, the positioning device extends out of the positioning shaft to be inserted into the positioning hole of the connecting piece to complete positioning, and crystal switching is rapidly completed in the oscillator.
2. The switching plate is provided with a plurality of sub-plates, each sub-plate is provided with a connecting piece fixed with the adapter, crystals are fixed on the adapter, the crystals can be crystals of the same type and thickness, and crystals of different types and thicknesses can be used for realizing comparison. The fixing mode between the adapter piece and the connecting piece can be adjusted according to the relative position of the switching disk and the optical path, so that the switching device does not influence the optical path and only provides a crystal switching function.
3. Be provided with the spacing groove on the first connection minute dish of first minute dish, the spacing groove is located the line of symmetry of first minute dish, spacing inslot fixed connection spare for remain the vertical state throughout between connecting piece and the first minute dish, the relative position of connecting piece and first minute dish is fixed, and then confirm the crystal on the adaptor and the relative position of first minute dish, rotate first minute dish to positioner, then can confirm that the position of crystal reaches the assigned position, combine to accomplish the location through the locating hole of location axle and connecting piece, can be in order to accomplish the crystal and switch. The second and third sub-discs are consistent with the first sub-disc in operation, and only the rotation angle and the path are different.
4. In the embodiment of the invention, three sub-discs are arranged; the thickness ratio of a first rotating ring of the first sub-disc to a first connecting sub-disc is one to three, the second sub-disc and the third sub-disc are arranged in the same manner, and the first rotating ring, the second rotating ring and the third rotating ring are all sleeved on the fixed shaft, wherein the first rotating ring is located at the bottommost part, the second rotating ring is located in the middle, and the third rotating ring is located above, so that each sub-disc can independently rotate, but the first connecting sub-disc, the second connecting sub-disc and the third connecting sub-disc cannot be overlapped. Each sub-disc is provided with a standby crystal which can be switched for many times, and the number of the sub-discs is not limited to three.
5. The switching disc is also provided with a separation stopping disc, when the driving device drives the transmission disc, the separation stopping disc can be driven to rotate, and the position of the separation stopping disc is fixed to determine the rotating range of the separation stopping disc, so that the sequence among the separation stopping discs is always kept in an initial state; when the positioning device releases the connecting piece, the transmission disc can completely rotate all the sub-discs to the initial state to perform switching operation of the next crystal. The space occupied by all the sub-disks on the switching disk can be half of the rotation range, so that the connecting piece of each sub-disk can be positioned with the positioning device.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.
Fig. 1 is a schematic structural diagram of a crystal switching device suitable for an optical parametric oscillator according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a rotating ring of a crystal switching device for an optical parametric oscillator according to an embodiment of the present invention;
fig. 3 is a main structure diagram of a switching plate and a driving plate of a crystal switching device suitable for an optical parametric oscillator according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a main body of a switching disk of a crystal switching apparatus for an optical parametric oscillator according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a main body of a driving plate of a crystal switching device for an optical parametric oscillator according to an embodiment of the present invention;
FIG. 6 is a block diagram of a first sub-disc of a crystal switching device for an optical parametric oscillator according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view of a first sub-disc of a crystal switching device suitable for use in an optical parametric oscillator, in accordance with an embodiment of the present invention;
FIG. 8 is a block diagram of a second sub-disc of a crystal switching device for an optical parametric oscillator, in accordance with an embodiment of the present invention;
FIG. 9 is a cross-sectional view of a second sub-disc of a crystal switching device suitable for use in an optical parametric oscillator, in accordance with embodiments of the present invention;
FIG. 10 is a block diagram of a third sub-disc of a crystal switching device for an optical parametric oscillator, in accordance with an embodiment of the present invention;
FIG. 11 is a cross-sectional view of a third sub-disc of a crystal switching device suitable for use in an optical parametric oscillator, in accordance with embodiments of the present invention;
FIG. 12 is a top view of a first sub-disc of a crystal switching device suitable for use in an optical parametric oscillator, in accordance with an embodiment of the present invention;
FIG. 13 is a top view of a first sub-plate and a connection piece of a crystal switching device for an optical parametric oscillator, in accordance with an embodiment of the present invention;
FIG. 14 is an enlarged view of the structure at A in FIG. 1 according to an embodiment of the present invention;
FIG. 15 is a schematic cross-sectional view taken along lines in FIG. 14 of an embodiment of the present invention;
FIG. 16 is an enlarged view of the structure at B in FIG. 1 according to an embodiment of the present invention;
fig. 17 is a schematic diagram of an adapter of a crystal switching device suitable for an optical parametric oscillator according to an embodiment of the present invention;
FIG. 18 is a top view of a connection piece of a crystal switching device suitable for use in an optical parametric oscillator, in accordance with an embodiment of the present invention;
FIG. 19 is a schematic diagram of a connection of a crystal switching device suitable for use in an optical parametric oscillator, according to an embodiment of the present invention, as viewed from the bottom;
FIG. 20 is a schematic diagram of a positioning axis of a crystal switching device for an optical parametric oscillator according to an embodiment of the present invention;
FIG. 21 is a top view of a crystal switching device suitable for use in an optical parametric oscillator, in accordance with an embodiment of the present invention;
FIG. 22 is a diagram illustrating a third tap of a crystal switching device for an optical parametric oscillator according to an embodiment of the present invention;
fig. 23 is a diagram illustrating a switching operation of a crystal switching device for an optical parametric oscillator to a second sub-disc according to an embodiment of the present invention;
fig. 24 is a schematic diagram illustrating a switching operation of a crystal switching device for an optical parametric oscillator to a first sub-disc according to an embodiment of the present invention.
In the figure: 1. a switching disc; 2. a drive plate; 3. a connecting member; 4. a positioning device; 5. an adapter; 6. a drive device; 7. a visor; 8. a substrate; 9. a fixed shaft; 10. a limiting groove; 11. a first sub-disc; 12. a second sub-disc; 13. a third disc division; 14. stopping the disc; 21. a shaft hole; 22. a stopper portion; 31. Inserting holes; 32. positioning holes; 33. a connecting portion; 34. a convergence unit; 41. positioning the shaft; 51. a limiting member; 52. a threaded portion; 53. a fixing member; 61. a drive shaft; 71. a shielding plate; 91. a positioning ring; 111. a first rotating ring; 112. a first connection sub-disc; 113. a first snap ring; 121. a second rotating ring; 122. a second connecting sub-disc; 123. a second snap ring; 131. a third rotating ring; 132. a third connecting sub-disc; 133. a third snap ring; 311. a limiting hole; 141. a concave ring; 411. a positioning part; 412. a smooth portion.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is to be understood that the drawings in the following description are merely exemplary of the invention and that other drawings and embodiments can be derived by those skilled in the art without undue burden. The designation of the design orientation merely indicates the relative positional relationship between the respective members, not the absolute positional relationship.
The embodiment of the invention provides a crystal switching device suitable for an optical parametric oscillator, which can quickly complete crystal switching in the oscillator and ensure the endurance of the oscillator. Referring to fig. 1 to 24, the crystal switching device in the embodiment of the present invention mainly includes a switching plate 1, a driving plate 2, a connecting member 3, and a positioning device 4, wherein the switching plate 1 is provided with a rotating ring, the driving plate 2 is provided with a shaft hole 21, the switching plate 1 and the driving plate 2 are coaxially disposed on a fixing shaft 9, and the fixing shaft 9 is fixed on a substrate 8. The base of the driving device 6 is fixed on the base plate 8, and the driving shaft 61 of the driving device 6 is engaged with the outer side wall of the transmission disc 2, so that the driving device 6 can drive the transmission disc 2 to rotate through the driving shaft 61. The driving device 6 can adopt a stepping motor, so that the angle of the driving shaft 61 for driving the transmission disc 2 to rotate can be controlled. The switching disc 1 is positioned on the transmission disc 2, the switching disc 1 is composed of a plurality of sub-discs, three sub-discs are taken as an example in the embodiment of the invention for explanation, the lower surface of each sub-disc of the switching disc 1 except the rotating ring of the shaft center part is contacted with the upper surface of the transmission disc 2, so that the transmission disc 2 can drive the switching disc 1 to synchronously rotate when rotating. The friction coefficient between the lower surface of the sub-disc of the switching disc 1 and the upper surface of the transmission disc 2 can be designed according to actual conditions, so that the transmission disc 2 can smoothly drive the switching disc 1 to synchronously rotate without sliding when rotating; when the branch plate of the switching plate 1 receives the stopping piece and can not rotate, the transmission plate 2 can continue to rotate, and meanwhile, other branch plates which are not stopped can be driven to continue to rotate.
Referring to fig. 1, 3 and 22, an initial position of the switching plate 1 may be determined, so that the driving device 6 can obtain a relative position of the switching plate 1 when driving the driving plate 2, thereby determining a rotation amount of the driving device 6, and rotating the sub-plates of the switching plate 1 to a proper position, that is, a position of the positioning device 4, so that the positioning device 4 can fix the position of the sub-plate and does not rotate with the driving plate 2, and other sub-plates can still rotate with the driving plate 2. The transmission disc 2 can now restore the other part discs to their initial position.
In the embodiment of the invention, the three subdivisions are respectively a first subdistrict 11, a second subdistrict 12 and a third subdistrict 13. Referring to fig. 3-11, the first plate 11 includes a first rotating ring 111, a first connecting plate 112, and a first retaining ring 113; the second sub disc 12 comprises a second rotating ring 121, a second connecting sub disc 122 and a third snap ring 123; the third minute disc 13 includes a third rotary ring 131, a third connecting minute disc 132, and a third snap ring 133. The thickness of three rotating rings is the same as that of one connecting sub-disc, the first rotating ring 111 is located below the connecting end face of the first connecting sub-disc 112, the second rotating ring 121 is located in the middle of the connecting end face of the second connecting sub-disc 123, and the third rotating ring 131 is located above the connecting end face of the third connecting sub-disc 132, so that when the rotating rings are coaxially connected, each sub-disc is sequentially sequenced, each connecting sub-disc can be flatly installed on the transmission disc 2 without overlapping, and each sub-disc can independently rotate but is limited by the occupied space of other sub-discs.
Taking the first snap ring 113 of the first sub-disc 11 as an example in the embodiment of the present invention, the first snap ring 113 is sleeved in the positioning ring 91 of the fixed shaft 9. The holding ring 91 can be split into two symmetrical upper and lower structures, a lower structure is firstly sleeved on the fixing shaft 9, then the first clamping ring 113 is installed in the lower structure, the upper structure is installed on the fixing shaft 9, the upper and lower structures form the holding ring 91, so that the holding ring 91 can clamp the first clamping ring 113 of the first sub-tray 11 and form independent rotation connection with the fixing shaft 9, and the rotation connection with other sub-trays does not have influence. It is understood that the second and third subdivisions 12 and 13 are connected to the first subdistrict 11 in the same manner, and only the positional relationship is different, and will not be described in detail.
Taking the first sub-disc 11 in the embodiment of the present invention as an example, starting from an initial position, the driving device 6 drives the transmission disc 2 to rotate, and drives the switching disc 1 to rotate by a certain angle, so that the first sub-disc 11 reaches a fixed position and can be positioned and combined with the positioning device 4; at this time, the first subdistrict 11, the second subdistrict 12 and the third subdistrict 13 are tightly attached together and are not separated; the driving device 6 can be turned over to rotate the second subdisc 12 and the second subdisc 13 which are not fixed to the initial position (at this time, the rotating angle can be excessive), so as to avoid the influence between crystal light wires. When the crystal needs to be switched, the positioning device 4 is opened to be combined with the first sub-plate 11 in a positioning mode, and the second sub-plate 12 is located at the initial position, so that the transmission plate 2 can be directly driven to rotate the second sub-plate 12 to the position of the positioning device 4 to be combined in a positioning mode, and the crystal switching is completed.
It can be understood that, after the second minute disc 12 is positioned and combined with the positioning device 4, the first minute disc 11 and the third minute disc 13 are both in contact with the second minute disc 12, at this time, the first minute disc 11 can be rotated to the left end point (the rotation angle can be excessive) by continuously rotating the transmission disc 2, at this time, the third minute disc 13 is still in contact with the second minute disc, and then the transmission disc 2 is rotated reversely, the third minute disc 13 is separated from the second minute disc 12, so that the first minute disc 11 and the third minute disc 13 are both kept at a certain distance from the second minute disc 12.
When the third minute disc 13 needs to be switched, the third minute disc 13 can be reversely rotated to the initial position (the rotating angle can be excessive), then the positioning combination of the positioning device 4 and the second minute disc 12 is released, and the first minute disc 11 is contacted with the second minute disc 12; the driving device 6 drives the transmission disc 2 to rotate the third minute disc 13 located at the initial position to the positioning device 4, so that the third minute disc 13 can be positioned and combined with the positioning device 4 to complete the switching of the crystals, and the first crystal 11 and the second crystal 12 at the moment are located at the termination point.
In the embodiment of the invention, the transmission disc 2 and the switching disc 1 are coaxially arranged on the fixed shaft 9, the central part of the stopping disc 14 is provided with the concave ring 141 which is sleeved outside the rotating ring and does not influence the rotation of the rotating ring, two sides of the stopping disc 14 can be respectively used as a starting point and an end point, and the stopping disc 14 can be fixedly arranged relative to the transmission disc 2 and the switching disc 1, so that the initial position and the end position are always kept unchanged relative to the positioning device 4, and the reference point can be accurately found when crystals are switched.
Taking the first sub-disc 11 as an example, please refer to fig. 12 and 13, in an embodiment of the present invention, a limiting groove 10 is disposed on a symmetric center line of the first sub-disc 11, and the limiting groove 10 is located on an upper surface of an outer edge of the first connecting sub-disc 10. The limiting groove 10 is used for installing the connecting piece 3, the connecting portion 33 of the connecting piece 3 is inserted into the limiting groove 10 and fixedly connected together, and the connecting piece 3 is always vertical to the first connecting sub-plate 112. The free end of the connecting piece 3 is provided with an inserting hole 31 and a positioning hole 32, wherein the inserting hole 31 is used for fixedly installing the adapter 5, and the upper end of the adapter 5 is fixed with a standby crystal; wherein the positioning hole 32 and the positioning shaft 41 of the positioning device 4 form a matching relationship, and positioning combination can be completed.
The upper end of the plug hole 31 is provided with a limiting hole 311, the adaptor 5 is provided with a limiting piece 51 matched with the limiting hole 311, so that when the adaptor 5 is plugged into the plug hole 31, the limiting piece 51 can be combined with the limiting hole 311, the relative position of the adaptor 5 is limited, the relative position of the standby crystal is further limited, and when the sub-disc is positioned, the relative positions of the crystal and the positioning device 4 are ensured to be uniform after each switching. It can be understood that the adaptor 5 is detachable at any time, a threaded portion 52 may be provided at the lower end of the adaptor 5, the portion extending out of the insertion hole 31 is fixed by a fixing member 53, and the adaptor 5 is fixed on the connecting member 3 by matching with the limiting member 51. Furthermore, according to the service conditions of the light path, the relative positions of the adapter piece 5 and the connecting piece 3 can be changed, and the service angle of the standby crystal is adjusted, so that the adapter piece 5 can be detached at any time and can meet the use requirements.
The positioning hole 32 may be provided with a constriction portion 34 at the periphery of the lower end thereof, the positioning hole 32 is located in the middle of the constriction portion 34, and the constriction portion 34 can expand the rotation error range of the driving device 6, so that the positioning of the positioning shaft 41 and the positioning hole 32 is easier. The side wall of the binding part 34 inclines towards the positioning hole 32, and the positioning shaft 41 abutted against the side wall of the binding part 34 pushes the connecting piece 3 to slightly rotate in the process of gradually growing, so that the positioning hole 32 automatically corrects and completes positioning combination with the positioning shaft 41; correspondingly, the abutting portion of the positioning shaft 41 may be provided with a smooth portion 412, so that the positioning shaft 41 can push the connecting member 3 to slide, so that the positioning shaft 41 can complete positioning combination with the positioning hole 32. Further, in order to ensure the positioning stability between the positioning shaft 41 and the connecting member 3, a portion inserted into the positioning hole 32 may be a polygonal prism, and the positioning hole 32 may be a polygonal prism through hole, so as to ensure the combination stability of the positioning hole 32 and the positioning shaft 41.
Vertical threads are arranged between the driving shaft 61 of the driving device 6 and the outer wall side of the transmission disc 2, so that the driving shaft 61 and the transmission disc 2 can form a meshing relation, and the driving device 6 drives the transmission disc 2. A stopper 22 may be provided at an upper end of an outer sidewall of the transmission disc 2 to define an engagement length of the driving shaft 61 with the transmission disc 2 so that the driving shaft 61 does not contact an object on an upper surface of the transmission disc 2.
Based on the above device, when the crystal switching device suitable for the optical parametric oscillator of the present invention is operated, the step motor of the driving device 6 should preset an execution scheme for driving the rotation angle of the driving disc 2 each time, so that when the step motor is driven, the step motor can accurately rotate the sub-disc to the positioning combination position of the positioning device 4, and complete the positioning combination, thereby determining the position of the standby crystal. Further, after the standby crystal is positioned, the other sub-trays can be rotated to the initial position by continuously operating the stepping motor for the next switching.
A light shielding plate 7 may be provided on the periphery of the switching disk 1 to leave a light path. A movable shielding plate 71 can be arranged on an optical path to shield light, then the crystal is directly switched, and after the switching is finished, the shielding plate 71 is removed.
The above-described aspects may be implemented individually or in various combinations, and such variations are within the scope of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the specific embodiments of the invention be limited to these descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. The crystal switching device is suitable for the optical parametric oscillator and is characterized by comprising a switching disc (1), a transmission disc (2), a connecting piece (3) and a positioning device (4), wherein the switching disc (1) and the transmission disc (2) are coaxially arranged on a fixed shaft (9), the switching disc (1) is positioned above the transmission disc (2), the switching disc (1) is provided with a plurality of sub-discs which are not overlapped, each sub-disc comprises a rotating ring and a clamping ring, the clamping ring is arranged in a central hole of the rotating ring, the fixed shaft (9) is provided with a positioning ring (91), and the clamping ring is clamped in the positioning ring (91) so that the clamping ring and the fixed shaft (9) form rotating connection; the sub-discs further comprise connecting sub-discs, the thickness of each connecting sub-disc is consistent, the thickness of all the rotating rings is consistent with that of one connecting sub-disc, and the rotating rings are positioned at the fixedly connected positions on the connecting sub-discs in a staggered mode, so that when all the rotating rings are sequentially sleeved on the fixed shaft (9), all the connecting sub-discs are sequentially arranged on the transmission disc (2) and are not overlapped; the outer edge of each sub-disc is provided with the connecting piece (3), the free end of each connecting piece (3) is provided with a positioning hole (32), the transmission disc (2) is rotated to drive the sub-disc of the switching disc (1) to rotate to the positioning device (4) and stop, and the positioning device (4) stretches out of a positioning shaft (41) to be combined with the positioning holes (32) in a positioning mode, so that crystals fixed by the connecting pieces (3) on each sub-disc are switched.
2. The crystal switching device suitable for the optical parametric oscillator according to claim 1, further comprising a stopping disc (14), wherein the stopping disc (14) is fixed in position to determine a rotation start point and a rotation stop point of the stopping disc, the stopping disc (14) is provided with a concave ring (141), and the concave ring (141) is sleeved outside the rotating ring and does not influence the rotation of the rotating ring.
3. The crystal switching device suitable for the optical parametric oscillator according to claim 1, wherein the sub-disc is provided with a limiting groove (10), the limiting groove (10) is disposed on a symmetry line of the sub-disc, and a connecting portion (33) of the connecting member (3) is fixedly connected in the limiting groove (10), so that the connecting member (3) is always perpendicular to the sub-disc.
4. A crystal switching device suitable for an optical parametric oscillator according to claim 3, further comprising an adaptor (5), wherein the upper end of the adaptor (5) is used for fixing a crystal, and the lower end of the adaptor (5) is inserted into the insertion hole (31) of the connector (3), so that the adaptor (5) can be replaced at any time.
5. The crystal switching device suitable for the optical parametric oscillator according to claim 4, wherein a limiting member (51) is disposed at a lower end of the adaptor (5), and a limiting hole (311) is disposed in the insertion hole (31) and engaged with the limiting member (51), so that when the adaptor (5) is inserted into the insertion hole (31), the limiting member (51) can be engaged with the limiting hole (311) to fix a relative position of the adaptor (5).
6. A crystal switching device suitable for an optical parametric oscillator according to claim 5, wherein the lower end of the adapter (5) is provided with a threaded portion (52), and the threaded portion (52) is used in cooperation with a fixing member (53) so that the adapter (5) can be fixed on the connecting member (3).
7. The crystal switching device suitable for the optical parametric oscillator according to claim 1, wherein the connecting member (3) further comprises a converging portion (34), the positioning hole (32) is located at a central portion of the converging portion (34), and a smooth portion (412) is provided at a front end of the positioning shaft (41), and when the smooth portion (412) abuts against the converging portion (34), the positioning shaft can slide into the positioning hole (32), so that the positioning shaft (41) and the positioning hole (32) are combined and positioned.
8. The crystal switching device for the optical parametric oscillator according to claim 1, further comprising a driving device (6), wherein a driving shaft (61) of the driving device (6) is engaged with an outer side wall of the driving disc (2) so that the driving device (6) can drive the driving disc (2), and a stopping portion (22) is disposed on the outer side wall of the driving disc (2) for stopping the driving shaft (61).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011147551.2A CN112234427B (en) | 2020-10-23 | 2020-10-23 | Crystal switching device suitable for optical parametric oscillator |
| PCT/CN2021/092046 WO2022083105A1 (en) | 2020-10-23 | 2021-05-07 | Crystal switching device suitable for optical parametric oscillator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011147551.2A CN112234427B (en) | 2020-10-23 | 2020-10-23 | Crystal switching device suitable for optical parametric oscillator |
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| CN112234427B true CN112234427B (en) | 2021-07-09 |
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| CN112234427A (en) | 2021-01-15 |
| WO2022083105A1 (en) | 2022-04-28 |
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