Erbium glass laser module, erbium glass laser equipment and laser ranging system
By introducing a driving pulse timing logic module and a polarization beam combining module into the erbium glass laser module, the pulse frequency of the erbium glass laser was increased, the problem of low repetition frequency was solved, and the ranging frequency and length of the laser ranging system were improved.
Patent Information
- Application Number
- CN202520182600.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-05
AI Technical Summary
Erbium glass lasers have a low repetition rate, making it difficult to meet the ranging requirements of high-dynamic scenarios such as drones.
The driving pulse timing logic module generates two pulse signals with the same pulse frequency and a 180° phase difference, which drive two erbium glass laser modules to generate pulsed light waves that alternate in time. The pulses are then coupled non-destructively to the fiber end module through the polarization beam combiner module and collimated by the lens module, thereby increasing the pulse frequency.
The ranging frequency of the laser ranging system has been increased, meeting the tracking and ranging requirements of highly dynamic targets, and the ranging length has been extended.
Smart Images
Figure CN223757841U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to laser ranging technical field especially relates to a kind of erbium glass laser module, erbium glass laser equipment and laser ranging system. BACKGROUND
[0002] Erbium glass laser has been widely applied in laser ranging field, because it has the outstanding advantages such as small size, high power, low energy consumption, long life, and is favored by laser ranging. According to the energy size of erbium glass laser, the ranging range of kilometers or even dozens of kilometers can be realized at present. The disadvantage of erbium glass laser is low repetition frequency, which is difficult to meet the ranging demand of tracking dynamic target in high-speed ranging, especially high dynamic equipment such as unmanned aerial vehicle.
[0003] Therefore, a high-frequency pulsed light emitting source is needed to meet the ranging demand in high dynamic scene such as unmanned aerial vehicle. UTILITY MODEL CONTENT
[0004] The main purpose of the utility model is to provide an erbium glass laser module, erbium glass laser equipment and laser ranging system, to meet the ranging demand in high dynamic scene such as unmanned aerial vehicle.
[0005] To achieve the above purpose, the utility model provides an erbium glass laser module, which comprises a lens module, a fiber end module, a polarization beam combination module, a first erbium glass laser module, a second erbium glass laser module and a driving pulse timing logic module.
[0006] The lens module is arranged towards the fiber end module, the fiber end module is electrically connected with the first end of the polarization beam combination module, the second end of the polarization beam combination module is respectively electrically connected with the first end of the first erbium glass laser module and the first end of the second erbium glass laser module.
[0007] The second end of the first erbium glass laser module is electrically connected with the first pulse end of the driving pulse timing logic module, and the second end of the second erbium glass laser module is electrically connected with the second pulse end of the driving pulse timing logic module.
[0008] In an embodiment, the first erbium glass laser module comprises a first fiber end cap, a first erbium glass laser and a first pulse power amplifier.
[0009] The first fiber end of the first fiber end cap constitutes the first end of the first erbium glass laser module, and is electrically connected with the second end of the polarization beam combination module.
[0010] The second fiber end of the first fiber end cap is arranged towards a laser output end of the first erbium glass laser, and a laser input end of the first erbium glass laser is electrically connected with an output end of the first pulse power amplifier.
[0011] The input end of the first pulse power amplifier constitutes a second end of the first erbium glass laser module and is electrically connected with a first pulse end of the driving pulse timing logic module.
[0012] In an embodiment, a 0° polarization maintaining fiber fusion splicing point is arranged between the first fiber end of the first fiber end cap and the second end of the polarization beam combining module.
[0013] In an embodiment, the second erbium glass laser module comprises a second fiber end cap, a second erbium glass laser and a second pulse power amplifier.
[0014] The first fiber end of the second fiber end cap constitutes a first end of the first erbium glass laser module and is electrically connected with the second end of the polarization beam combining module.
[0015] The second fiber end of the second fiber end cap is arranged towards a laser output end of the second erbium glass laser, and a laser input end of the second erbium glass laser is electrically connected with an output end of the second pulse power amplifier.
[0016] The input end of the second pulse power amplifier constitutes a second end of the first erbium glass laser module and is electrically connected with a first pulse end of the driving pulse timing logic module.
[0017] In an embodiment, a 90° polarization maintaining fiber fusion splicing point is arranged between the first fiber end of the second fiber end cap and the second end of the polarization beam combining module.
[0018] In an embodiment, the driving pulse timing logic module comprises a first pulse power driver, a second pulse power driver and a pulse timing logic unit, and the pulse timing logic unit is electrically connected with an input end of the first pulse power driver and an input end of the second pulse power driver respectively.
[0019] The output end of the first pulse power driver constitutes a first pulse end of the driving pulse timing logic module and is electrically connected with a second end of the first erbium glass laser module.
[0020] The output end of the second pulse power driver constitutes a second pulse end of the driving pulse timing logic module and is electrically connected with a second end of the second erbium glass laser module.
[0021] In an embodiment, the pulse timing logic unit is a phase-alternating pulse driving signal generator.
[0022] In an embodiment, the lens module is a transmitting lens, the fiber end module is a third fiber end cap, and the polarization beam combining module is a polarization beam combiner.
[0023] In addition, the erbium glass laser equipment at least includes the erbium glass laser module of any one of the above.
[0024] In addition, the erbium glass laser equipment at least includes the erbium glass laser module of any one of the above.
[0025] The erbium glass laser module provided by the erbium glass laser module is integrated with a lens module, a fiber end module, a polarization beam combining module, a first erbium glass laser module, a second erbium glass laser module and a driving pulse timing logic module. Specifically, to improve the repetition frequency of the pulse laser, the driving pulse timing logic module provided by the application can generate two pulse signals with the same pulse frequency f and a pulse phase difference of 180°, respectively driving two erbium glass laser modules (the first erbium glass laser module and the second erbium glass laser module) to generate two time-sequential alternating pulse light waves entering the polarization beam combining module, thereby realizing the pulse frequency f of the pulse laser is improved to 2f, overcoming the defect of low repetition frequency of the erbium glass laser, so that the ranging frequency of the laser ranging system applied to the erbium glass laser module is doubled, which is beneficial to improve the demand of dynamic target tracking and ranging; Next, the polarization beam combining module provided by the application couples the two pulse light waves to the fiber end module without loss, and outputs through the lens module, which is beneficial to improve the ranging length of the laser ranging system. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.
[0027] Figure 1 The structure diagram of the erbium glass laser module of an embodiment of the present application is provided.
[0028] Figure 2 The structure diagram of the erbium glass laser module of an embodiment of the present application is provided.
[0029] Figure 3 The structure diagram of the erbium glass laser module of an embodiment of the present application is provided.
[0030] Figure 4 The structure diagram of the erbium glass laser module of an embodiment of the present application is provided.
[0031] Figure 5 The erbium glass laser device block diagram is related to the embodiments of the present application.
[0032] BRIEF DESCRIPTION OF DRAWINGS
[0033] 10, lens module; 20, fiber end module; 30, polarization beam combination module; 40, first erbium glass laser module; 50, second erbium glass laser module; 60, driving pulse timing logic module; 41, first fiber end cap; 42, first erbium glass laser; 43, first pulse power amplifier.
[0034] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.
[0036] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.
[0037] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.
[0038] Erbium glass laser has been widely used in the field of laser ranging, because it has the outstanding advantages of small size, high power, low energy consumption, long life and is favored by laser ranging. According to the energy size of erbium glass laser, the ranging range of kilometers or even dozens of kilometers can be realized. The disadvantage of erbium glass laser is that the repetition frequency is low, and it is difficult to meet the ranging demand of tracking dynamic target in high-speed ranging, especially for high dynamic equipment such as unmanned aerial vehicle.
[0039] Therefore, there is an urgent need for a high-frequency pulsed light emitting source to meet the ranging demand in high dynamic scene such as unmanned aerial vehicle.
[0040] In summary, in order to solve the above technical defects, the erbium glass laser module, erbium glass laser equipment and laser ranging system are provided.
[0041] In an embodiment of the present application, please refer to Figure 1 , Figure 1 The erbium glass laser module provided by the present application is an embodiment of the structure schematic diagram. The erbium glass laser module comprises a lens module 10, a fiber end module 20, a polarization beam combining module 30, a first erbium glass laser module 40, a second erbium glass laser module 50 and a driving pulse timing logic module 60; the lens module 10 is arranged towards the fiber end module 20, the fiber end module 20 is electrically connected with the first end of the polarization beam combining module 30, the second end of the polarization beam combining module 30 is respectively electrically connected with the first end of the first erbium glass laser module 40 and the first end of the second erbium glass laser module 50; the second end of the first erbium glass laser module 40 is electrically connected with the first pulse end of the driving pulse timing logic module 60, and the second end of the second erbium glass laser module 50 is electrically connected with the second pulse end of the driving pulse timing logic module 60.
[0042] The erbium glass laser module set provided by the utility model is integrated with a lens module 10, a fiber end module 20, a polarization beam combination module 30, a first erbium glass laser module 40, a second erbium glass laser module 50 and a driving pulse time sequence logic module 60. Specifically, in order to improve the repetition frequency of the pulse laser, the driving pulse time sequence logic module 60 provided by the application can generate two pulse signals with the same pulse frequency f and a pulse phase difference of 180°, and drive two erbium glass laser modules (the first erbium glass laser module 40 and the second erbium glass laser module 50) to generate two time-sequentially alternating pulse light waves, which then enter the polarization beam combination module 30, so as to realize the improvement of the pulse frequency f of the pulse laser to 2f, overcome the defect of low repetition frequency of the erbium glass laser, and double the ranging frequency of the laser ranging system applied to the erbium glass laser module, which is beneficial to the demand for dynamic target tracking and ranging.
[0043] Further, in some possible embodiments, with reference to Figure 2 , Figure 2 is a schematic view of a double erbium glass laser module related to the embodiments of the utility model. The first erbium glass laser module 40 comprises a first fiber end cap 41, a first erbium glass laser 42 and a first pulse power amplifier 43; a first fiber end of the first fiber end cap 41 constitutes a first end of the first erbium glass laser module 40, and is electrically connected with a second end of the polarization beam combination module 30; a second fiber end of the first fiber end cap 41 is arranged towards a laser output end of the first erbium glass laser 42, a laser input end of the first erbium glass laser 42 is electrically connected with an output end of the first pulse power amplifier 43; an input end of the first pulse power amplifier 43 constitutes a second end of the first erbium glass laser module 40, and is electrically connected with a first pulse end of the driving pulse time sequence logic module 60.
[0044] Further, in some possible embodiments, a 0° polarization maintaining fiber fusion point is arranged between the first fiber end of the first fiber end cap 41 and the second end of the polarization beam combination module 30.
[0045] In the embodiment, the second end of the polarization beam combination module 30 comprises a slow axis input end, with reference to Figure 2 , the first erbium glass laser 42 couples the pulse light wave into the polarization maintaining fiber through the first fiber end cap 41, and couples the pulse light wave into the slow axis input end (i.e. the slow axis input end of the polarization beam combiner) of the polarization beam combination module 30 through the 0° polarization maintaining fiber fusion point.
[0046] Further, in some possible embodiments, with reference to Figure 2The second erbium glass laser module 50 comprises a second fiber end cap, a second erbium glass laser and a second pulse power amplifier; a first fiber end of the second fiber end cap constitutes a first end of the first erbium glass laser module 40 and is electrically connected with a second end of the polarization beam combining module 30; a second fiber end of the second fiber end cap is arranged towards a laser output end of the second erbium glass laser, a laser input end of the second erbium glass laser is electrically connected with an output end of the second pulse power amplifier; an input end of the second pulse power amplifier constitutes a second end of the first erbium glass laser module 40 and is electrically connected with a first pulse end of the driving pulse timing logic module 60.
[0047] Further, in some possible embodiments, referring to Figure 2 , a 90° polarization maintaining fiber fusion point is arranged between the first fiber end of the second fiber end cap and the second end of the polarization beam combining module 30.
[0048] In the embodiment, the second end of the polarization beam combining module 30 comprises a fast axis input end, referring to Figure 2 , the second erbium glass laser couples the pulsed light wave into the polarization maintaining fiber through the second fiber end cap and couples the pulsed light wave into the fast axis input end of the polarization beam combining module 30 (i.e. the fast axis input end of the polarization beam combiner) through the 90° polarization maintaining fiber fusion point.
[0049] Further, in some possible embodiments, referring to Figure 3 , Figure 3 A driving pulse timing logic module 60 is shown in the figure. The driving pulse timing logic module 60 comprises a first pulse power driver, a second pulse power driver and a pulse timing logic unit, the pulse timing logic unit is electrically connected with an input end of the first pulse power driver and an input end of the second pulse power driver respectively; an output end of the first pulse power driver constitutes a first pulse end of the driving pulse timing logic module 60 and is electrically connected with a second end of the first erbium glass laser module 40; an output end of the second pulse power driver constitutes a second pulse end of the driving pulse timing logic module 60 and is electrically connected with a second end of the second erbium glass laser module 50.
[0050] In the embodiment, the driving pulse of the first pulse power driver and the driving pulse of the second pulse power driver are pulse signals of the same pulse frequency f but with a phase difference of 180°.
[0051] Further, in some possible embodiments, referring to Figure 4 , Figure 4 A schematic diagram of an erbium glass laser module is shown in the figure. The pulse timing logic unit is a phase-alternating pulse driving signal generator.
[0052] In the embodiment, the pulse timing logic unit can be a field-programmable gate array (FPGA).
[0053] Further, in other possible embodiments, referring to Figure 4 , the lens module 10 is a transmitting lens, the fiber end module 20 is a third fiber end cap, and the polarization beam combining module 30 is a polarization beam combiner.
[0054] In the embodiment, the polarization beam combining module 30 combines two pulse light waves to form a pulse light wave with a pulse repetition frequency of 2f, and couples the pulse light wave into the lens module 10 through the fiber end module 20, and emits the pulse light after collimation and expansion by the lens module 10.
[0055] In specific embodiments, the polarization beam combiner provided in the present application can realize lossless beam combination of light waves in two polarization directions compared with a general coupler. Since the output wavelengths of the two erbium glass lasers are approximately the same, if a fiber coupler is used to combine two optical pulses, each will lose half the energy. However, by using a polarization beam combiner, the two pulse lights can be fully coupled through different polarization states, avoiding coupling loss.
[0056] The utility model also proposes an erbium glass laser device, referring to Figure 5 , Figure 5 is a block diagram of the erbium glass laser device related to the embodiments of the utility model. The erbium glass laser device at least includes the erbium glass laser module described above, and the specific structure of the erbium glass laser module refers to the above embodiments. Since the erbium glass laser device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.
[0057] The utility model also proposes a laser ranging system, which at least includes the erbium glass laser device described above, and the specific structure of the laser ranging system refers to the above embodiments. Since the laser ranging system adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.
[0058] The above is only an exemplary embodiment of the utility model, and does not limit the patent scope of the utility model, and any equivalent structural transformation made by using the contents of the utility model specification and drawings, or direct / indirect application in other related laser ranging technical fields is included in the patent protection scope of the utility model.
Claims
1. An erbium glass laser module, characterized by, The erbium glass laser module comprises a lens module, a fiber end module, a polarization beam combining module, a first erbium glass laser module, a second erbium glass laser module and a driving pulse timing logic module. The lens module is arranged towards the fiber end module, the fiber end module is electrically connected with a first end of the polarization beam combining module, a second end of the polarization beam combining module is electrically connected with a first end of the first erbium glass laser module and a first end of the second erbium glass laser module respectively; A second end of the first erbium glass laser module is electrically connected with a first pulse end of the driving pulse timing logic module, and a second end of the second erbium glass laser module is electrically connected with a second pulse end of the driving pulse timing logic module.
2. The erbium glass laser module of claim 1, wherein the erbium glass laser module is configured to operate in a continuous wave mode. The first erbium glass laser module comprises a first fiber end cap, a first erbium glass laser and a first pulse power amplifier. A first fiber end of the first fiber end cap constitutes a first end of the first erbium glass laser module and is electrically connected with the second end of the polarization beam combining module. A second fiber end of the first fiber end cap is arranged towards a laser output end of the first erbium glass laser, and a laser input end of the first erbium glass laser is electrically connected with an output end of the first pulse power amplifier. An input end of the first pulse power amplifier constitutes a second end of the first erbium glass laser module and is electrically connected with the first pulse end of the driving pulse timing logic module.
3. The erbium glass laser module of claim 2, wherein the first and second mirrors are each a dichroic mirror. A 0° polarization maintaining fiber fusion joint is arranged between the first fiber end of the first fiber end cap and the second end of the polarization beam combining module.
4. The erbium glass laser module of claim 1, wherein the erbium glass laser module is configured to operate in a continuous wave mode. The second erbium glass laser module comprises a second fiber end cap, a second erbium glass laser and a second pulse power amplifier. A first fiber end of the second fiber end cap constitutes a first end of the first erbium glass laser module and is electrically connected with the second end of the polarization beam combining module. A second fiber end of the second fiber end cap is arranged towards a laser output end of the second erbium glass laser, and a laser input end of the second erbium glass laser is electrically connected with an output end of the second pulse power amplifier. An input end of the second pulse power amplifier constitutes a second end of the first erbium glass laser module and is electrically connected with the first pulse end of the driving pulse timing logic module.
5. The erbium glass laser module of claim 4, wherein the first and second mirrors are each a dichroic mirror. A 90° polarization maintaining fiber fusion joint is arranged between the first fiber end of the second fiber end cap and the second end of the polarization beam combining module.
6. The erbium glass laser module of claim 5, wherein the first and second mirrors are each a dichroic mirror. The driving pulse timing logic module comprises a first pulse power driver, a second pulse power driver and a pulse timing logic unit, the pulse timing logic unit is electrically connected with an input end of the first pulse power driver and an input end of the second pulse power driver respectively; An output end of the first pulse power driver constitutes a first pulse end of the driving pulse timing logic module and is electrically connected with the second end of the first erbium glass laser module; An output end of the second pulse power driver constitutes a second pulse end of the driving pulse timing logic module and is electrically connected with the second end of the second erbium glass laser module.
7. The erbium glass laser module of claim 5, wherein the first and second mirrors are each a dichroic mirror. The pulse timing logic unit is a phase-alternating pulse driving signal generator.
8. The erbium glass laser module as described in claim 1, characterized in that, The lens module is a transmitting lens, the optical fiber end module is a third optical fiber end cap, and the polarization beam combination module is a polarization beam combiner.
9. An erbium glass laser device, characterized by, The erbium glass laser device at least comprises the erbium glass laser module according to any one of claims 1 to 8.
10. A laser ranging system characterized by, The laser ranging system at least comprises the erbium glass laser device according to claim 9.