Measuring system of photonic crystal fiber

Abstract

The utility model discloses a measuring system of a photonic crystal fiber. The measuring system comprises a broadband light source, a first focusing lens, a beam splitter prism, a second focusing lens, a particle photonic crystal fiber, a laser, a high-power microscope, a spectrograph, a heating device and a power-up device, the broadband light source is arranged at the starting end of a light path, a light beam emitted by the broadband light source passes through the emergent surface of the beam splitter prism and then enters the first focusing lens, and the first focusing lens is arranged at the first end of the particle photonic crystal fiber and is used for focusing the light beam emitted by the beam splitter prism and then entering the first end of the particle photonic crystal fiber; the laser is arranged at the second end of the particle photonic crystal fiber, and a laser beam emitted by the laser is focused by the second focusing lens and then enters the second end of the particle photonic crystal fiber; the high-power microscope is vertically arranged right above the particle photonic crystal fiber; the device has the advantages that real-time dynamic control, multi-parameter synchronous measurement and high-sensitivity detection can be realized, and the experiment efficiency and the result accuracy are improved.

Description

Technical Field

[0001] The utility model relates to a measuring system, in particular to a measuring system for photonic crystal optical fibers. Background Art

[0002] As a new type of specialty optical fiber, photonic crystal fiber (PCF) demonstrates tremendous potential for applications in optical communications, nonlinear optics, lasers, and sensing due to its unique structure and excellent optical properties. PCFs are typically constructed from silica glass, containing a series of regularly arranged air holes or other low-refractive-index materials, forming structures resembling two-dimensional or three-dimensional photonic crystals. These structures not only guide light propagation through the fiber but also, through the design of various microstructures, can manipulate light transmission properties such as dispersion, nonlinearity, and mode field diameter. Consequently, photonic crystal fibers offer unprecedented possibilities for a variety of advanced photonics applications, becoming a vital component of modern optical research and technological development.

[0003] Traditional methods for evaluating and measuring the performance of photonic crystal fibers (PCFs) rely primarily on analyzing the fiber's output spectrum under static conditions. Specifically, this approach involves illuminating the PCF with a fixed-wavelength light source and recording the changes in the output optical signal using a spectrometer or other device. This type of static testing provides information about the fiber's fundamental optical properties, such as transmission loss, mode distribution, and nonlinear effects.

[0004] Although existing measurement techniques and devices have met the basic needs of PCF research to a certain extent, they have several significant limitations. First, due to the lack of dynamic control capabilities, traditional measurement methods cannot change factors that affect the position of particles inside PCFs, such as temperature and electric field strength, in real time, making it difficult to accurately simulate changes in actual working environments. Second, because these external conditions cannot be effectively adjusted and controlled, the measurement sensitivity of specific physical quantities (such as temperature and electric field) is also limited. Third, most existing systems can only focus on measuring one or a few specific parameters and lack the ability to comprehensively consider the changes in PCF performance under the combined influence of multiple external factors. This further weakens the comprehensiveness and accuracy of experimental results. This single-parameter measurement approach weakens the comprehensiveness and accuracy of experimental results. Especially when testing PCFs with different structures and functions, traditional experimental equipment often requires the reconstruction of a new measurement platform, resulting in low experimental efficiency.

[0005] Therefore, a more advanced, flexible and efficient photonic crystal fiber measurement system is urgently needed to overcome these problems and promote technological development in this field. Utility Model Content

[0006] The purpose of the utility model is to provide a measurement system for photonic crystal optical fibers, which can realize real-time dynamic control, multi-parameter synchronous measurement and high-sensitivity detection, thereby improving experimental efficiency and result accuracy.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a photonic crystal fiber measurement system, comprising:

[0008] Broadband light source, first focusing lens, beam splitter, second focusing lens, micro-photonic crystal fiber, laser, high-power microscope, spectrometer, heating device and power supply device;

[0009] The broadband light source is arranged at the starting end of the optical path, and the light beam emitted by the broadband light source is incident on the first focusing lens after passing through the exit surface of the beam splitter prism. The first focusing lens is arranged at the first end of the micro-particle photonic crystal fiber and is used to focus the light beam emitted by the beam splitter prism and then inject it into the first end of the micro-particle photonic crystal fiber;

[0010] The laser is arranged at the second end of the micro-particle photonic crystal fiber, and the laser beam emitted by the laser is focused by the second focusing lens and then incident on the second end of the micro-particle photonic crystal fiber;

[0011] The high-power microscope is vertically arranged directly above the micro-particle photonic crystal fiber;

[0012] The backscattered light generated in the micro-photonic crystal fiber passes through the output surface of the beam splitter prism and is then transmitted to the spectrometer through the optical fiber;

[0013] The heating device is arranged directly below the micro-particle photonic crystal fiber and maintains physical contact with the micro-particle photonic crystal fiber;

[0014] The two electrodes of the power supply device are electrically connected to the two ends of the micro-photonic crystal fiber respectively.

[0015] Preferably, the beam splitter prism includes an incident surface, a reflective surface and an exit surface, the incident surface is used to receive a light beam emitted by a broadband light source, the reflective surface is used to reflect the incident light, and the exit surface is used to guide the reflected light to the first focusing lens and receive backscattered light from the micro-photonic crystal fiber, and the beam splitter prism is mounted on a beam splitter bracket.

[0016] Preferably, the first focusing lens and the second focusing lens are both achromatic focusing lenses, and are respectively mounted on adjustable brackets.

[0017] Preferably, the adjustable bracket includes a base, a column, a first connecting arm and a second connecting arm, a mounting seat is fixed on the base, the lower end of the column is hinged to the middle of the mounting seat, one end of the first connecting arm is hinged to the upper end of the column, and the other end is hinged to the middle of the second connecting arm, the second connecting arm is provided with a ring fixing seat for installing, and the first focusing lens or the second focusing lens is fixed in the ring fixing seat.

[0018] Preferably, the heating device includes a heating platform, a temperature controller and a temperature sensor. A heating groove is provided on the upper surface of the heating platform. The heating groove matches the size of the micro-photonic crystal fiber. The micro-photonic crystal fiber is placed in the heating groove. The temperature sensor monitors the temperature of the heating groove in real time and feeds back the temperature signal to the temperature controller. The temperature controller is used to adjust the heating power of the heating platform.

[0019] Preferably, the power-on device includes a high-precision DC power supply, a voltage controller and two electrodes, the output end of the high-precision DC power supply is electrically connected to the input end of the voltage controller, the output end of the voltage controller is electrically connected to the input ends of the two electrodes respectively, and the two electrodes are respectively arranged at the two ends of the micro-particle photonic crystal fiber and are tightly fitted to the end face of the micro-particle photonic crystal fiber.

[0020] Preferably, the wavelength range of the broadband light source is 400nm-1200nm, the laser wavelength emitted by the laser is 632.8nm, the temperature control range of the heating device is 20°C-80°C, and the voltage range of the power supply device is 0V-250V.

[0021] Compared with existing technologies, the advantages of this utility model are as follows: the system combines a broadband light source with a laser to provide a wide spectral range and high-intensity multi-wavelength input to the micro-particle photonic crystal fiber, enhancing the optical measurement capabilities of the fiber. After the broadband light beam is separated by a beam splitter prism, it is focused onto the first end of the fiber through a first focusing lens, allowing the incident light to be precisely coupled into the fiber. Simultaneously, the laser beam generated by the laser is focused onto the second end of the fiber through a second focusing lens, achieving the coupling of multiple light sources within the fiber. A high-power microscope is positioned vertically above the fiber, enabling real-time observation of the light transmission and scattering process within the fiber, ensuring measurement accuracy and visualization. The backscattered light from the micro-particle photonic crystal fiber is transmitted to a spectrometer via a beam splitter prism for precise analysis of the spectral characteristics.

[0022] Meanwhile, the heating device is in physical contact with the optical fiber, and the physical parameters of the optical fiber such as the thermal expansion coefficient and the refractive index are adjusted through temperature control, so as to provide a thermal effect regulation means for the experiment; the two electrodes of the electrifying device are electrically connected with the two ends of the optical fiber respectively, and the dynamic regulation of the optical characteristics of the optical fiber is realized through the direct application of the electric field, for example, the refractive index distribution or the light guide mode is changed, and the dynamic response performance of the optical fiber is enhanced; the two regulation modes of heating and electrifying work together, so that the system can accurately measure and regulate the optical behavior of the optical fiber under complex external conditions; the overall design not only has the measurement capabilities of high sensitivity and high precision, but also has the advantages of multi-parameter comprehensive regulation, provides strong support for the research on the optical characteristics of the photonic crystal fiber, and can meet various experimental requirements. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating labor.

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of the utility model when the light splitting prism cooperates with the light splitting support;

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the utility model of the adjustable support;

[0027] Figure 4 It is a three-dimensional structural schematic diagram of the utility model of the heating device;

[0028] Figure 5 It is a circuit connection block diagram of the utility model of the heating device;

[0029] Figure 6 It is a circuit connection block diagram of the utility model of the electrifying device;

[0030] In the figure, 1, broadband light source; 2, first focusing lens; 3, light splitting prism; 4, second focusing lens; 5, microparticle photonic crystal fiber; 6, laser; 7, high-power microscope; 8, spectrometer; 9, heating device; 10, electrifying device; 11, light splitting support; 12, adjustable support; 13, base; 14, stand; 15, first connecting arm; 16, second connecting arm; 17, circular ring fixing seat; 18, heating table; 19, temperature controller; 20, temperature sensor; 21, heating groove; 22, high-precision direct current power supply; 23, voltage controller. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] Example 1: As shown in the figure, a photonic crystal fiber measurement system includes:

[0033] Broadband light source 1, first focusing lens 2, beam splitter prism 3, second focusing lens 4, micro-particle photonic crystal fiber 5, laser 6, high-power microscope 7, spectrometer 8, heating device 9 and power supply device 10;

[0034] The broadband light source 1 is arranged at the starting end of the optical path. The light beam emitted by the broadband light source 1 passes through the exit surface of the beam splitter prism 3 and is incident on the first focusing lens 2. The first focusing lens 2 is arranged at the first end of the micro-particle photonic crystal fiber 5 and is used to focus the light beam emitted by the beam splitter prism 3 and then make it incident on the first end of the micro-particle photonic crystal fiber 5.

[0035] The laser 6 is arranged at the second end of the micro-particle photonic crystal fiber 5, and the laser beam emitted by the laser 6 is focused by the second focusing lens 4 and then incident on the second end of the micro-particle photonic crystal fiber 5;

[0036] The high-power microscope 7 is vertically arranged directly above the micro-photonic crystal fiber 5;

[0037] The backscattered light generated in the micro-photonic crystal fiber 5 passes through the exit surface of the beam splitter prism 3 and is then transmitted to the spectrometer 8 through the optical fiber;

[0038] The heating device 9 is arranged directly below the micro-particle photonic crystal fiber 5 and maintains physical contact with the micro-particle photonic crystal fiber 5;

[0039] The two electrodes of the power supply device 10 are electrically connected to the two ends of the micro-photonic crystal fiber 5 respectively.

[0040] Embodiment 2: As shown in the figure, the difference from Embodiment 1 is that the beam splitter prism 3 includes an incident surface, a reflective surface and an output surface. The incident surface is used to receive the light beam emitted by the broadband light source 1, the reflective surface is used to reflect the incident light, and the output surface is used to guide the reflected light to the first focusing lens 2 and receive the backscattered light from the micro-photonic crystal fiber 5, and the beam splitter prism 3 is installed on the beam splitter bracket 11.

[0041] In the above structure, the beam splitter prism 3 consists of an incident surface, a reflective surface and an exit surface. The incident surface is used to receive the light beam emitted by the broadband light source 1. The reflective surface reflects the incident light beam to the exit surface through precise geometric design, thereby guiding the light beam into the first focusing lens 2 and focusing it to the first end of the micro-photonic crystal fiber 5. This design ensures that the broadband light beam can be transmitted into the optical fiber along the optimal optical path, thereby improving the optical coupling efficiency of the system.

[0042] The output surface of the beam splitter prism 3 also has a dual function: it can not only guide the reflected light to the optical fiber, but also receive the backscattered light from the optical fiber and transmit it to the spectrometer 8 through the optical fiber for detection. This bidirectional optical path design makes the beam splitter prism 3 the core node in the optical system, realizing the integrated processing of input and output optical signals, effectively simplifying the optical path structure, and improving the compactness and functional integration of the system.

[0043] In addition, the spectroscopic prism 3 is installed on the spectroscopic bracket 11, ensuring its stability and precise positioning in the system, and avoiding the stability of the optical path affected by mechanical vibration or external disturbance. Through this structure, the system realizes efficient input of broadband light source 1, dynamic observation of optical phenomena inside the optical fiber and high-precision detection of backscattered light, and has the significant advantages of reasonable optical path design, high integration and excellent measurement efficiency.

[0044] Embodiment 3: As shown in the figure, the difference from Embodiment 2 is that the first focusing lens 2 and the second focusing lens 4 are both achromatic focusing lenses, and are respectively mounted on an adjustable bracket 12.

[0045] In the above structure, the achromatic focusing lens can effectively reduce the focus offset problem of light of different wavelengths caused by the dispersion effect, thereby ensuring the optical consistency of light of different wavelengths during the focusing process of the broadband light source 1 and the laser 6. This feature improves the focusing accuracy of the optical path and ensures that the light beam can be efficiently coupled to both ends of the micro-photonic crystal fiber 5, achieving high-quality light transmission and mode excitation.

[0046] The first focusing lens 2 and the second focusing lens 4 are respectively mounted on the adjustable bracket 12, which provides precise adjustability of position and angle. The adjustable bracket 12 can flexibly adjust the alignment and focusing parameters of the optical path according to actual experimental requirements to cope with different types of optical fiber structures or experimental conditions, thereby further improving the adaptability and operational convenience of the system. Moreover, through the adjustable bracket 12, the user can achieve precise positioning of the light beam, avoid the problem of reduced coupling efficiency due to optical path deviation, and also facilitate rapid adjustment and optimization of the experimental settings.

[0047] In this embodiment, the adjustable bracket 12 includes a base 13, a column 14, a first connecting arm 15 and a second connecting arm 16. A mounting seat is fixed on the base 13. The lower end of the column 14 is hinged to the middle of the mounting seat. One end of the first connecting arm 15 is hinged to the upper end of the column 14, and the other end is hinged to the middle of the second connecting arm 16. The second connecting arm 16 is provided with a circular fixing seat 17 for installing the first focusing lens 2 or the second focusing lens 4 is fixed in the circular fixing seat 17.

[0048] In the above structure, the base 13 is hinged to the lower end of the column 14 through the mounting seat, so that the entire adjustable bracket 12 is firmly supported at the bottom, and at the same time provides a basic fulcrum for adjusting the tilt angle of the column 14. The upper end of the column 14 is hinged to the first connecting arm 15, and the other end of the first connecting arm 15 is hinged to the middle of the second connecting arm 16. This multi-hinge point design allows the bracket to be flexibly adjusted in multiple directions, thereby achieving precise alignment of the lens position.

[0049] The second connecting arm 16 is provided with a circular fixing seat 17 for fixing the optical element. By fixing the position and angle of the lens, the precise transmission of the light path is ensured. The first focusing lens 2 or the second focusing lens 4 is installed in the circular fixing seat 17. By adjusting and coordinating with the adjustable bracket 12, micron-level movement and angle fine-tuning of the lens can be achieved, thereby performing highly precise focusing and coupling operations on the incident light beam. This structure can easily cope with the problem of light path alignment changes caused by optical fiber characteristics, light source configuration or system dynamic adjustment requirements during the experiment.

[0050] In general, the multi-hinge point design provides a larger operating range, and the circular ring mount 17 ensures that the lens is firmly installed after adjustment, effectively avoiding the influence of vibration or offset on the optical path. Combined with the use of achromatic focusing lenses, this bracket design can not only adapt to complex experimental conditions, but also greatly improve the optical coupling efficiency and the convenience of optical path adjustment, providing important guarantees for the high-precision operation of the entire optical system.

[0051] Example 4: As shown in the figure, the difference from Example 3 is that the heating device 9 includes a heating platform 18, a temperature controller 19 and a temperature sensor 20. A heating groove 21 is provided on the upper surface of the heating platform 18. The heating groove 21 matches the size of the micro-particle photonic crystal fiber 5. The micro-particle photonic crystal fiber 5 is placed in the heating groove 21. The temperature sensor 20 monitors the temperature of the heating groove 21 in real time and feeds back the temperature signal to the temperature controller 19. The temperature controller 19 is used to adjust the heating power of the heating platform 18.

[0052] In the above structure, the heating platform 18 adopts electric heating and serves as the main heating component. Its upper surface is provided with a heating groove 21 that matches the size of the micro-photonic crystal fiber 5. By embedding the optical fiber into the heating groove 21, close contact heating of the optical fiber is achieved. This design ensures the uniformity of heating of the optical fiber and avoids uneven temperature distribution or local overheating due to poor contact.

[0053] The temperature sensor 20 monitors the temperature of the heating tank 21 in real time and feeds back the measured temperature signal to the temperature controller 19 to form a closed-loop control system. The temperature controller 19 automatically adjusts the heating power of the heating table 18 according to the feedback signal, thereby realizing dynamic and precise control of the heating temperature. This real-time closed-loop control mechanism can not only meet the needs of different temperature environments in the experiment, but also quickly respond to changes in ambient temperature, ensuring that the optical fiber works under the set temperature conditions and improving measurement accuracy and stability.

[0054] In addition, the design of the heating groove 21 of the heating device 9 conforms to the structural characteristics of the optical fiber, and realizes the combination of mechanical support and heating function through precise matching. In the experiment, the close cooperation between the heating device 9 and the optical fiber enables temperature control and optical measurement to be carried out simultaneously, providing reliable support for studying the optical behavior of the optical fiber under different temperature conditions.

[0055] In this embodiment, the power supply device 10 includes a high-precision DC power supply 22, a voltage controller 23 and two electrodes. The output end of the high-precision DC power supply 22 is electrically connected to the input end of the voltage controller 23, and the output end of the voltage controller 23 is electrically connected to the input ends of the two electrodes respectively. The two electrodes are respectively arranged at the two ends of the micro-particle photonic crystal fiber 5 and are tightly fitted with the end face of the micro-particle photonic crystal fiber 5.

[0056] In the above structure, the power supply device 10 consists of a high-precision DC power supply 22, a voltage controller 23, and two electrodes. The DC power supply provides a stable power output for the system, while the voltage controller 23 is used to precisely regulate the output voltage. Electrically connecting the output of the DC power supply to the input of the voltage controller 23 ensures the stability of the input voltage. The output of the voltage controller 23 is electrically connected to the two electrodes, enabling precise control of the applied electric field.

[0057] Two electrodes are respectively arranged at the two ends of the micro-particle photonic crystal fiber 5 and are tightly fitted to the end face of the fiber. Through this design, the electric field can directly act on the microstructure inside the fiber. This method effectively enhances the efficiency of the electric field, so that the optical properties of the fiber (such as refractive index distribution, optical waveguide mode, etc.) can be dynamically controlled as the electric field changes. Especially when the electric field is uniformly distributed in the fiber, more precise optical performance adjustment can be achieved, providing a reliable experimental basis for the study of photonic crystal fibers under different electric field environments.

[0058] In this embodiment, the wavelength range of the broadband light source 1 is 400nm-1200nm, the laser wavelength emitted by the laser 6 is 632.8nm, the temperature control range of the heating device 9 is 20℃-80℃, and the voltage range of the power supply device 10 is 0V-250V.

[0059] In the above structure, the wavelength range of the broadband light source 1 is 400nm-1200nm, covering the visible light and near-infrared spectral range, and can provide the system with rich optical information at multiple wavelengths, thereby meeting the input requirements of the micro-particle photonic crystal fiber 5 for a wider spectral range and improving the comprehensive measurement capability of the optical properties inside the optical fiber; the laser wavelength emitted by the laser 6 is 632.8nm, which is located in the visible light band and has high monochromaticity and high coherence, providing a highly stable single-wavelength light source for studying the mode coupling, scattering effects and other optical properties of the optical fiber.

[0060] The temperature control range of the heating device 9 is 20°C-80°C, covering the temperature range required for typical experiments. Through precise temperature control, the changes in the optical properties of the optical fiber under different thermal environments can be studied, such as the temperature dependence of the thermo-induced refractive index change and mode transmission. The stability and uniformity of the heating device 9 ensure the consistency of the experimental conditions and provide a guarantee for the reliability of the experimental results.

[0061] The voltage range of the power supply device 10 is 0V-250V, which can apply a voltage environment from weak field to strong field to the optical fiber to achieve dynamic regulation of the optical properties of the optical fiber, such as changing the refractive index distribution through the electric field or exciting the electrically controlled optical nonlinear effect. The wide voltage adjustment range enhances the flexibility of the experiment and adapts to different research needs.

[0062] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A photonic crystal fiber measurement system, characterized in that: include, Broadband light source, first focusing lens, beam splitter, second focusing lens, micro-photonic crystal fiber, laser, high-power microscope, spectrometer, heating device and power supply device; The broadband light source is arranged at the starting end of the optical path, and the light beam emitted by the broadband light source is incident on the first focusing lens after passing through the exit surface of the beam splitter prism. The first focusing lens is arranged at the first end of the micro-particle photonic crystal fiber and is used to focus the light beam emitted by the beam splitter prism and then inject it into the first end of the micro-particle photonic crystal fiber; The laser is arranged at the second end of the micro-particle photonic crystal fiber, and the laser beam emitted by the laser is focused by the second focusing lens and then incident on the second end of the micro-particle photonic crystal fiber; The high-power microscope is vertically arranged directly above the micro-photonic crystal fiber; The backscattered light generated in the micro-photonic crystal fiber passes through the output surface of the beam splitter prism and is then transmitted to the spectrometer through the optical fiber; The heating device is arranged directly below the micro-particle photonic crystal fiber and maintains physical contact with the micro-particle photonic crystal fiber; The two electrodes of the power supply device are electrically connected to the two ends of the micro-photonic crystal fiber respectively.

2. A photonic crystal fiber measurement system according to claim 1, characterized in that: The beam splitter prism includes an incident surface, a reflective surface and an output surface. The incident surface is used to receive a light beam emitted by a broadband light source, the reflective surface is used to reflect the incident light, and the output surface is used to guide the reflected light to the first focusing lens and receive backscattered light from the micro-photonic crystal fiber, respectively. The beam splitter prism is installed on a beam splitter bracket.

3. A photonic crystal fiber measurement system according to claim 1, characterized in that: The first focusing lens and the second focusing lens are both achromatic focusing lenses and are respectively mounted on adjustable brackets.

4. A photonic crystal fiber measurement system according to claim 3, characterized in that: The adjustable bracket includes a base, a column, a first connecting arm and a second connecting arm. A mounting seat is fixed on the base. The lower end of the column is hinged to the middle of the mounting seat. One end of the first connecting arm is hinged to the upper end of the column, and the other end is hinged to the middle of the second connecting arm. The second connecting arm is provided with a ring fixing seat for installing the first focusing lens or the second focusing lens is fixed in the ring fixing seat.

5. The photonic crystal fiber measurement system according to claim 1, characterized in that: The heating device includes a heating platform, a temperature controller and a temperature sensor. The upper surface of the heating platform is provided with a heating groove, which matches the size of the micro-particle photonic crystal fiber. The micro-particle photonic crystal fiber is placed in the heating groove. The temperature sensor monitors the temperature of the heating groove in real time and feeds back the temperature signal to the temperature controller. The temperature controller is used to adjust the heating power of the heating platform.

6. A photonic crystal fiber measurement system according to claim 1, characterized in that: The power-on device includes a high-precision DC power supply, a voltage controller, and two electrodes. The output end of the high-precision DC power supply is electrically connected to the input end of the voltage controller, and the output end of the voltage controller is electrically connected to the input ends of the two electrodes respectively. The two electrodes are respectively arranged at the two ends of the micro-particle photonic crystal fiber and are tightly fitted to the end face of the micro-particle photonic crystal fiber.

7. A photonic crystal fiber measurement system according to claim 1, characterized in that: The wavelength range of the broadband light source is 400nm-1200nm, the wavelength of the laser emitted by the laser is 632.8nm, the temperature control range of the heating device is 20℃-80℃, and the voltage range of the power supply device is 0V-250V.

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