Circularly polarized light generator device and manufacturing method thereof

Abstract

The invention relates to the technical field of optics, and discloses a circularly polarized light generator device and a manufacturing method thereof. The circularly polarized light generator device is used for generating circularly polarized light with different wavelengths and comprises a collimator, a linear polarizer and a first wave plate with preset phase retardation. The collimator is fixed on the first coaxial plate, the linear polarizer is fixed on the third coaxial plate, and the first wave plate is fixed on the fourth coaxial plate; the first coaxial plate is connected to the third coaxial plate through a fifth connecting rod with five lengths, and the third coaxial plate is connected to the fourth coaxial plate through a third connecting rod with a third length; and laser generated by an external laser sequentially passes through the collimator, the linear polarizer and the central point of the first wave plate. The device is constructed in a standardized manner, test variable interference is reduced, different laser wavelengths can be switched, a chiral material and a photoelectric detection technology are combined, the rotation direction can be directly distinguished, and the device is suitable for compact real-time photoelectric detection.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to a circularly polarized light generator device and a manufacturing method thereof. Background Art

[0002] Circularly polarized light (CPL) has important application value in photonic technology fields such as encrypted communications, quantum computing, satellite communications, bioimaging and multi-channel data processing. Among them, left-circularly polarized light (LCPL / RCPL) can be used as independent channels to transmit information, and the data transmission rate can be doubled compared to unpolarized light. The development of CPL-based communications relies on high-performance circularly polarized photodetectors and CPL sources. Chiral materials can directly distinguish left-circularly polarized light from right-circularly polarized light without the need for additional optical elements, making circularly polarized photodetectors and light sources based on chiral materials have great application potential in the fields of integrated and flexible devices. However, there are some technical defects in the circularly polarized light-related detection devices and methods in the existing technology: on the one hand, there is no standard circularly polarized light generator construction process on the market, which directly leads to the lack of unified quantitative standards for key parameters such as intensity and spot size of chiral lasers used for photoelectric detection, thereby affecting the accuracy and reliability of subsequent photoelectric detection. On the other hand, traditional methods for generating circularly polarized light rely on the combination of multiple optical components. This is not only cumbersome and requires strict component alignment, but also suffers from bulky systems and low integration, making it difficult to meet the demands of miniaturization and integration in modern optical devices. These issues have severely hampered the practical application and development of circularly polarized light in integrated optoelectronic devices, real-time detection, and other fields. Summary of the Invention

[0003] The main technical problem to be solved by the embodiments of the present application is that the existing technology lacks a standard circularly polarized light generator device construction process, has insufficient wavelength adjustment capabilities, and has a complex detection scheme structure, which affects photoelectric detection.

[0004] To solve the above technical problems, a technical solution adopted in an embodiment of the present application is: providing a circularly polarized light generator device, which is used to generate circularly polarized light of different wavelengths, including: a collimator, a linear polarizer, and a first wave plate with a preset phase delay; the collimator is fixed to a first coaxial plate, the linear polarizer is fixed to a third coaxial plate, and the first wave plate is fixed to a fourth coaxial plate; the first coaxial plate is connected to the third coaxial plate via a fifth connecting rod of a fifth length, and the third coaxial plate is connected to the fourth coaxial plate via a third connecting rod of a third length; laser light generated by an external laser passes through the collimator, the linear polarizer, and the center point of the first wave plate in sequence.

[0005] Optionally, the circularly polarized light generator device further includes an attenuation plate; the attenuation plate is fixed to a second coaxial plate; the first coaxial plate is connected to the second coaxial plate via a first connecting rod of a first length, and the second coaxial plate is further connected to the third coaxial plate via a second connecting rod of a second length; the laser light generated by the external laser passes through the collimator, the attenuation plate, the linear polarizer and the center point of the first wave plate in sequence.

[0006] Optionally, the preset phase delay is λ / 4.

[0007] Optionally, the operating wavelength of the linear polarizer is in the range of 400 nm to 1700 nm.

[0008] Optionally, the operating wavelength of the wave plate with the preset phase delay is in the range of 266 nanometers to 1650 nanometers.

[0009] Optionally, the operating wavelength range of the collimator is 405 nanometers to 1550 nanometers.

[0010] Optionally, the output spot diameter of the collimator ranges from 5.0 mm to 6.9 mm.

[0011] Optionally, the linear polarizer has a clear aperture of 21.5 mm.

[0012] Optionally, the clear aperture of the wave plate with the preset phase delay is 10 mm or 20 mm.

[0013] To solve the above technical problems, another technical solution adopted in the embodiments of the present application is: providing a method for manufacturing a circularly polarized light generator device, comprising the following steps: obtaining a collimator, a linear polarizer, and a first wave plate with a preset phase delay of preset specifications; fixing the collimator to a preset first coaxial plate, fixing the linear polarizer to a preset third coaxial plate, and fixing the first wave plate to a preset fourth coaxial plate; connecting the first coaxial plate and the third coaxial plate using a fifth connecting rod with a preset fifth length, and connecting the third coaxial plate and the fourth coaxial plate using a third connecting rod with a preset third length, to obtain the circularly polarized light generator device.

[0014] The circularly polarized light generator device, used to generate circularly polarized light of varying wavelengths, includes a collimator, a linear polarizer, and a first wave plate with a preset phase delay. The collimator is fixed to a first coaxial plate, the linear polarizer is fixed to a third coaxial plate, and the first wave plate is fixed to a fourth coaxial plate. The first coaxial plate is connected to the third coaxial plate via a fifth connecting rod of a fifth length, and the third coaxial plate is connected to the fourth coaxial plate via a third connecting rod of a third length. Laser light generated by an external laser sequentially passes through the center point of the collimator, the linear polarizer, and the first wave plate. This circularly polarized light generator device utilizes a standardized construction method, effectively reducing interference from irrelevant variables during the testing process and ensuring the accuracy and reliability of test results. It also features the ability to flexibly incorporate different types of lasers, enabling adjustable wavelengths for photoelectric detection and generating circularly polarized light of various wavelengths. Furthermore, the device combines the optical selectivity of chiral materials with photoelectric detection technology, enabling the chiral photodetector to directly distinguish the handedness of circularly polarized light without the need for traditional complex optical components. This makes it particularly suitable for compact, real-time detection scenarios, significantly improving the convenience and efficiency of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0016] Figure 1 It is a three-dimensional diagram of the circularly polarized light generator device provided in an embodiment of the present application.

[0017] Figure 2 This is another stereoscopic diagram of the circularly polarized light generator device provided in an embodiment of the present application.

[0018] Figure 3 This is a light-dark separation comparison diagram of the circularly polarized light generator device provided in an embodiment of the present application generating left-handed / right-handed circularly polarized light to illuminate the photoconductive detector L-penicillamine-PbS.

[0019] Figure 4 This is a light-dark separation comparison diagram of the left-handed / right-handed circularly polarized light generated by the circularly polarized light generator device provided in an embodiment of the present application to illuminate the photoconductive detector D-penicillamine-PbS.

[0020] Figure 5 This is a light-dark separation comparison diagram of the L-penicillamine-PbS photoconductive detector illuminated by non-polarized light provided in an embodiment of the present application.

[0021] Figure 6 This is a light-dark separation comparison diagram of the photoconductive detector D-penicillamine-PbS illuminated by non-polarized light provided in an embodiment of the present application.

[0022] Figure 7 This is a method for manufacturing a circularly polarized light generator device provided in an embodiment of the present application.

[0023] The meanings of the numbers in the accompanying drawings are: 1-collimator; 2-attenuation plate; 3-linear polarizer; 4-first wave plate; 11-first coaxial plate; 21-second coaxial plate; 31-third coaxial plate; 41-fourth coaxial plate; 12-first connecting rod; 22-second connecting rod; 32-third connecting rod; 52-fifth connecting rod;. DETAILED DESCRIPTION

[0024] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or may be centered on the other element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or may be centered on the other element at the same time.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] See also Figure 1 , Figure 1 is a three-dimensional diagram of a circularly polarized light generator device provided in an embodiment of the present application, such as Figure 1 As shown, the circularly polarized light generator device is used to generate circularly polarized light of different wavelengths, and includes: a collimator 1, a linear polarizer 3, and a first wave plate 4 with a preset phase delay.

[0028] The collimator 1 is fixed to the first coaxial plate 11, the linear polarizer 3 is fixed to the third coaxial plate 31, and the first wave plate 4 is fixed to the fourth coaxial plate 41. The first coaxial plate 11 is connected to the third coaxial plate 31 via a fifth connecting rod 52 of a fifth length, and the third coaxial plate 31 is connected to the fourth coaxial plate 41 via a third connecting rod 32 of a third length. Laser light generated by an external laser passes through the center points of the collimator 1, the linear polarizer 3, and the first wave plate 4 in sequence.

[0029] Among them, the above-mentioned circularly polarized light generator device can generate circularly polarized light of corresponding wavelengths for lasers of different wavelengths (for example, 405nm, 1310nm, etc.) through the collaborative design of the collimator 1, the linear polarizer 3 and the first wave plate 4 with a preset phase delay. The collimator 1 collimates the laser beam, adjusts the output spot size, and ensures uniform distribution of light energy. The linear polarizer 3 converts unpolarized light into linearly polarized light. The first wave plate 4 generates a phase difference in the linearly polarized light through a specific phase delay (for example, 1 / 4 wavelength), and then converts it into left-handed or right-handed circularly polarized light. The standardized optical path design of the above embodiment solves the problem of no unified standard for the construction of circularly polarized light generators in the prior art, and provides a stable and repeatable test light source for chiral photodetectors.

[0030] As an optional implementation, please continue to refer to Figure 2 , Figure 2 FIG. 1 is another perspective view of the circularly polarized light generator device provided in an embodiment of the present application. Figure 2 As shown, the circularly polarized light generator device further includes an attenuator 2, which is fixed to a second coaxial plate 21. The first coaxial plate 11 is connected to the second coaxial plate 21 via a first connecting rod 12 of a first length, and the second coaxial plate 21 is further connected to the third coaxial plate 31 via a second connecting rod 22 of a second length. The laser light generated by the external laser sequentially passes through the center point of the collimator 1, the attenuator 2, the linear polarizer 3, and the first wave plate 4.

[0031] After the laser light is focused by the collimator 1, the spot energy density is high. If it were directly incident on components such as the linear polarizer 3 and the first wave plate 4, long-term high-energy exposure could damage the component films or cause performance degradation. The attenuation plate 2 absorbs or reflects some of the light energy, reducing the spot intensity and protecting the stability and service life of subsequent optical components, ensuring long-term stable operation of the device. This solves the problem of component damage caused by uncontrollable light source energy in the prior art.

[0032] As an optional embodiment, the preset phase delay is λ / 4, that is, the first wave plate 4 is a quarter-wave plate, and the preset fixed angle of the first wave plate 4 is ±45°. In this case, when the unpolarized light generated by the external laser is first converted into linearly polarized light by the linear polarizer 2 and then incident on the quarter-wave plate set at a fixed angle of ±45°, the two orthogonal polarization components of the linearly polarized light will produce a λ / 4 phase difference, and after synthesis, form left-handed circularly polarized light (LCPL) or right-handed circularly polarized light (RCPL), providing a standardized circularly polarized light test light source for chiral photodetectors.

[0033] Among them, the first wave plate 4 is designed to match the wavelength by presetting a fixed angle (±45°) to ensure that the handedness (left-handed / right-handed) and purity of the circularly polarized light are controllable, solving the problem of no standard for the construction of circularly polarized light generators in the prior art and providing a unified test light source for chiral photodetectors.

[0034] As an optional embodiment, the operating wavelength of the linear polarizer is in the range of 400 nm to 1700 nm, covering the wavelength range of 400 nm (blue light) to 1700 nm (near-infrared light), and can match a variety of lasers (for example, 405 nm visible light laser, 1310 nm infrared laser, etc.), so that the linear polarizer 3 can efficiently convert non-polarized light of the corresponding wavelength into linearly polarized light, providing a basic polarized light source for the subsequent first wave plate 4 (for example, 1 / 4 wave plate) to generate circularly polarized light.

[0035] Among them, the circularly polarized light generating device in the prior art is often only able to adapt to a single light source (such as only supporting visible light or near-infrared light) due to the narrow wavelength range of the linear polarizer. However, this solution can simultaneously meet the needs of generating circularly polarized light in different bands such as ultraviolet, visible light, and near-infrared through a wide range design of 400-1700nm. At the same time, it is compatible with laser light sources of different wavelengths without the need to frequently replace the linear polarizer, reducing the complexity and cost of device construction. The high polarization extinction ratio of the linear polarizer in the range of 400-1700nm (i.e., the ability to suppress non-target polarized light) ensures that the linearly polarized light generated at each wavelength has high purity, thereby maximizing the discrimination of the subsequent handedness (LCPL / RCPL) of the circularly polarized light.

[0036] As an optional embodiment, the operating wavelength of the wave plate with the preset phase delay amount is in the range of 266 nanometers to 1650 nanometers. Due to the narrow wavelength adaptation range (for example, only covering visible light), traditional wave plates cannot accurately produce λ / 4 phase difference in near-infrared bands such as 1310nm, resulting in chaotic rotation of circularly polarized light or insufficient purity. The present application uses a 266-1650nm wavelength design to enable the wave plate to maintain a stable phase delay capability in the near-infrared band. In addition, in conjunction with a coaxial plate-connecting rod structure (for example, the third connecting rod 32 connects the linear polarizer 3 and the first wave plate 4), a compact near-infrared optical path module is formed, which is smaller in size than the traditional multi-component combination solution and is suitable for integrated photoelectric detection equipment (for example, a portable near-infrared circularly polarized light detector).

[0037] As an optional implementation, the operating wavelength range of the collimator is 405 nanometers to 1550 nanometers.

[0038] As another optional embodiment, the output spot diameter of the collimator ranges from 5.0 mm to 6.9 mm.

[0039] Among them, for lasers of different wavelengths (for example, 1310nm, 405nm), the collimator 1 converts the divergent laser beam into parallel light through an optical lens group and adjusts the spot diameter to a specific size (for example, 1310nm corresponds to 6.6mm, 405nm corresponds to 5.0mm), ensuring uniform distribution of beam energy and providing a stable incident light source for the subsequent linear polarizer 3 (for example, working range 400-700nm and 700-1700nm) and the first wave plate 4 (for example, working range 405nm, 1100-1650mm). The operating wavelength and spot diameter of the collimator 1 need to match the parameters of the laser, the linear polarizer 3, and the first wave plate 4 to adapt to the optical path transmission in the ultraviolet-visible light-near infrared band.

[0040] As an optional implementation, the linear polarizer has a clear aperture of 21.5 mm.

[0041] As an optional implementation, the clear aperture of the wave plate with the preset phase delay is 10 mm or 20 mm.

[0042] Among them, in the circularly polarized light generator device, the clear aperture of the linear polarizer 3 (21.5mm) and the clear aperture of the first wave plate 4 (for example, 1 / 4 wave plate, 10mm) are designed to be different sizes, mainly based on the coordinated consideration of optical path energy transmission efficiency, component function differences and system integration requirements. The 21.5mm clear aperture of the linear polarizer 3 needs to adapt to the different spot diameters output by the collimator (for example, a 1310nm collimator outputs a 6.6mm spot and a 405nm collimator outputs a 5.0mm spot) to ensure that collimated light beams of different wavelengths can be fully incident to avoid light energy loss due to an aperture that is too small. For example, the 6.6mm spot of the 1310nm collimator needs to be fully received by the linear polarizer to ensure a polarization conversion efficiency of at least 90%. The first wave plate 4 (10mm aperture) serves as a subsequent component, and its aperture only needs to be sufficient to allow the collimated light spot to pass through. A 10mm aperture is sufficient to cover 6.6mm (1310nm) and 5.0mm (405nm) light spots. The smaller aperture reduces the material cost and processing difficulty of the optical component, while also reducing stray light interference. Although the larger aperture (21.5mm) of the linear polarizer 3 increases the cost, it avoids the need for customized polarizers for different light spots, enabling a single device to be compatible with multi-wavelength detection. The 10mm aperture of the first wave plate 4 is miniaturized, combined with the coaxial plate-rod structure (such as the third rod 32), making the optical path module smaller than the traditional solution (all large-aperture components), suitable for compact photoelectric detection equipment.

[0043] In addition, the present application also uses the circularly polarized light generator device in the above embodiment to generate left-handed / right-handed circularly polarized light, and then irradiates the generated left-handed / right-handed circularly polarized light onto a photoconductive device for testing, so that different test results of LCPL / RCPL can be obtained for photoconductive devices with different chirality. Among them, the photoconductive detector L- / D-penicillamine-PbS is taken as an example. The photoconductive detector is essentially similar to a photoresistor. When light is irradiated to the active layer, as long as the energy of the photon can excite the quantum dots, the photogenerated carriers will cause the carrier density of the material to change, thereby causing a change in the electrical signal. When the device is working, the current and voltage of the light guide are linearly related, and the formula is as follows: Where I is the device current, S is the channel cross-sectional area, L is the channel length, V is the applied voltage to the device, and σ is the material conductivity. As the lighting conditions change (left-handed circularly polarized light (LCPL), right-handed circularly polarized light (RCPL), and dark), the density of photogenerated carriers also changes, allowing the electrical signals to be distinguished. In a dark environment, the photogenerated carrier density can be assumed to be zero.

[0044] As an example, see Figure 3 , Figure 3This is a light-dark separation comparison diagram of the circularly polarized light generator device provided in an embodiment of the present application generating left-handed / right-handed circularly polarized light to illuminate the photoconductive detector L-penicillamine-PbS. The horizontal axis (Voltage (V)) represents the voltage applied to both ends of the photoconductive device, and the unit is volt (V), reflecting the change of voltage, which is used to observe the response characteristics of the device under different voltages. The vertical axis (Current (A)) represents the current generated by the photoconductive device, and the unit is ampere (A), reflecting the change of photogenerated carriers generated in the active layer of the device under the corresponding voltage and different lighting conditions (left-handed circularly polarized light LCPL, right-handed circularly polarized light RCPL, dark environment), thereby causing changes in the electrical signal. Figure 3 As shown, the light-dark separation of the photoconductive detector L-penicillamine-PbS under LCPL irradiation reaches 2.8μA; the light-dark separation of the photoconductive detector L-penicillamine-PbS under RCPL irradiation reaches 2.13μA.

[0045] As another example, see Figure 4 , Figure 4 This is a light-dark separation comparison diagram of the circularly polarized light generator device provided in an embodiment of the present application generating left-handed / right-handed circularly polarized light to illuminate the photoconductive detector D-penicillamine-PbS. The horizontal axis (Voltage (V)) represents the voltage applied to both ends of the photoconductive device, and the unit is volt (V), reflecting the change in voltage, and is used to observe the response characteristics of the device under different voltages. The vertical axis (Current (A)) represents the current generated by the photoconductive device, and the unit is ampere (A), reflecting the change in the photogenerated carriers generated in the active layer of the device under the corresponding voltage and different lighting conditions (left-handed circularly polarized light LCPL, right-handed circularly polarized light RCPL, dark environment), thereby causing a change in the electrical signal. As shown Figure 4 As shown, the light-dark separation of the photoconductive detector D-penicillamine-PbS under LCPL irradiation reaches 1.87 μA; the light-dark separation of the photoconductive detector D-penicillamine-PbS under RCPL irradiation reaches 2.3 μA.

[0046] As an example, see Figure 5 , Figure 5 This is a light-dark separation comparison diagram of the non-polarized light irradiated photoconductive detector L-penicillamine-PbS provided in an embodiment of the present application. The horizontal axis (Voltage (V)) represents the voltage applied to the two ends of the photoconductive device, the unit is volt (V), reflecting the change of voltage, and is used to observe the electrical response of the device under different voltages. The vertical axis (Current (A)) represents the current generated by the photoconductive device, the unit is ampere (A), reflecting the change of photogenerated carriers generated in the active layer of the device under the corresponding voltage and different lighting conditions (left-handed circularly polarized light LCPL, right-handed circularly polarized light RCPL, dark environment), thereby causing changes in electrical signals. Figure 5 As shown in Figure 3, under non-polarized light illumination, the light-dark separation of the L-penicillamine-PbS photoconductive device reaches 0.6 μA.

[0047] As an example, see Figure 6 , Figure 6 This is a light-dark separation comparison diagram of the non-polarized light irradiated photoconductive detector D-penicillamine-PbS provided in an embodiment of the present application. The horizontal axis (Voltage (V)) represents the voltage applied to the two ends of the photoconductive device, the unit is volt (V), reflecting the change of voltage, and is used to observe the electrical response of the device under different voltages. The vertical axis (Current (A)) represents the current generated by the photoconductive device, the unit is ampere (A), reflecting the change of photogenerated carriers generated in the active layer of the device under the corresponding voltage and different lighting conditions (left-handed circularly polarized light LCPL, right-handed circularly polarized light RCPL, dark environment), thereby causing changes in electrical signals. Figure 6 As shown in Figure 2, under non-polarized light irradiation, the light-dark separation of the D-penicillamine-PbS photoconductive device is 0.57 μA. Figure 5 and Figure 6 The comparison results show that the light-dark separation distinction of devices with different handedness under non-polarized light is not large.

[0048] Among them, according to the above Figure 3 、 Figure 4 、 Figure 5 and Figure 6 The comparative experimental results show that the chiral detector has significant differences in response to circularly polarized light of different rotational directions, verifying that the circularly polarized light generator device in the above embodiment can effectively support chiral materials to directly distinguish the rotational direction of circularly polarized light, solving the problem of the inability to identify the rotational direction in traditional non-polarized light detection. Compared with the circularly polarized light scene, the response difference under circularly polarized light illumination increased by 4-5 times, proving that the LCPL / RCPL generated by the circularly polarized light generator device in the above embodiment can greatly enhance the detection sensitivity and specificity of the chiral detector, highlighting the necessity of circularly polarized light detection in distinguishing the optical response of chiral materials. In the experiment, the light-dark separation data of photodetectors with different rotational directions were stable and consistent with the design principle of the device (linear polarizer + 1 / 4 wave plate to generate circularly polarized light). This shows that the circularly polarized light generator device in the above embodiment, through the construction of a standardized optical path, can eliminate the influence of variables such as unstable light source and non-uniform optical path in traditional testing, providing a repeatable and comparable quantitative testing standard for chiral photodetectors.

[0049] Please continue reading Figure 7 , Figure 7 This is a method for manufacturing a circularly polarized light generator device provided in an embodiment of the present application, such as Figure 7 As shown, it specifically includes the following steps S1 to S3.

[0050] S1. Obtain a collimator, a linear polarizer, and a first wave plate with a preset phase delay ratio.

[0051] S2. Fix the collimator to the preset first coaxial plate, fix the linear polarizer to the preset third coaxial plate, and fix the first wave plate to the preset fourth coaxial plate.

[0052] S3. Use a fifth connecting rod with a preset fifth length to connect the first coaxial plate and the third coaxial plate, and use a third connecting rod with a preset third length to connect the third coaxial plate and the fourth coaxial plate to obtain a circularly polarized light generator device.

[0053] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above embodiments merely represent preferred embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A circularly polarized light generator device, characterized in that: The circularly polarized light generator device is used to generate circularly polarized light of different wavelengths, and includes: a collimator, a linear polarizer, and a first wave plate with a preset phase delay; The collimator is fixed to the first coaxial plate, the linear polarizer is fixed to the third coaxial plate, and the first wave plate is fixed to the fourth coaxial plate; The first coaxial plate is connected to the third coaxial plate via a fifth connecting rod of a fifth length, and the third coaxial plate is connected to the fourth coaxial plate via a third connecting rod of a third length; The laser light generated by the external laser passes through the collimator, the linear polarizer and the center point of the first wave plate in sequence.

2. The circularly polarized light generator device according to claim 1, characterized in that: The circularly polarized light generator device further includes an attenuation plate; The attenuation plate is fixed to the second coaxial plate; The first coaxial plate is connected to the second coaxial plate via a first connecting rod of a first length, and the second coaxial plate is further connected to the third coaxial plate via a second connecting rod of a second length; The laser light generated by the external laser passes through the collimator, the attenuation plate, the linear polarization plate and the center point of the first wave plate in sequence.

3. The circularly polarized light generator device according to claim 1, characterized in that: The preset phase delay is λ / 4.

4. The circularly polarized light generator device according to claim 1, characterized in that: The operating wavelength of the linear polarizer is in the range of 400 nanometers to 1700 nanometers.

5. The circularly polarized light generator device according to claim 1, characterized in that: The operating wavelength of the wave plate with the preset phase delay ratio is in the range of 226 nanometers to 1650 nanometers.

6. The circularly polarized light generator device according to claim 1, characterized in that: The operating wavelength range of the collimator is 405 nanometers to 1550 nanometers.

7. The circularly polarized light generator device according to claim 1, characterized in that: The output spot diameter of the collimator ranges from 5.0 mm to 6.9 mm.

8. The circularly polarized light generator device according to claim 1, characterized in that: The linear polarizer has a clear aperture of 21.5 mm.

9. The circularly polarized light generator device according to claim 1, characterized in that: The clear aperture of the wave plate with the preset phase delay is 10 mm or 20 mm.

10. The method for manufacturing a circularly polarized light generator according to any one of claims 1 to 9, wherein: The steps include: Obtaining a collimator, a linear polarizer, and a first wave plate with a preset phase delay of preset specifications; Fixing the collimator to a preset first coaxial plate, fixing the linear polarizer to a preset third coaxial plate, and fixing the first wave plate to a preset fourth coaxial plate; The first coaxial plate and the third coaxial plate are connected using a fifth connecting rod with a preset fifth length, and the third coaxial plate and the fourth coaxial plate are connected using a third connecting rod with a preset third length to obtain the circularly polarized light generator device.

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