Laser testing device
By designing a laser testing device, the laser is split into two beams using an output head clamp and a beam splitter, enabling efficient and accurate testing of fiber lasers for vehicle-mounted lidar. This solves the problems of complex testing and low accuracy in existing technologies, and improves testing efficiency and adaptability.
Patent Information
- Application Number
- CN202423161939.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-20
AI Technical Summary
For fiber lasers in vehicle-mounted lidar systems, it is difficult to accurately measure output power, pulse parameters, and spectral parameters during full-temperature testing. Existing testing methods are complex and inefficient.
A laser testing device was designed, including a coupling device, a power meter, and measuring equipment. Using components such as an output head clamp, a beam splitter, and a collimating lens, the laser beam is split into two beams through a reflective film. One beam is transmitted to the power meter, and the other is transmitted to a spectrometer and other equipment, simplifying the optical path structure and improving adaptability and accuracy.
It improves the efficiency and accuracy of laser testing, simplifies the testing process, reduces the number of optical coupling devices used, adapts to different types of lasers, and avoids test distortion caused by random mode coupling.
Smart Images
Figure CN223664241U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to laser tester field especially relates to a laser tester device. BACKGROUND
[0002] The vehicle-mounted laser radar fiber laser often needs batch full-temperature test, but the output head is often used for the finished product of the laser, and it is difficult to realize the accurate measurement of the output power, pulse parameter and spectrum parameter of the laser.
[0003] Therefore, in actual testing, the form of bare fiber (or jumper) is often used for output, and 30dB-coupler is fused (or flange connected) for splitting, the tap end of 30dB-coupler transmits the split light to a spectrometer and an oscilloscope to realize parameter testing of pulses and spectra, and the output end of 30dB-coupler is transmitted to a power meter through a jumper to realize output power testing. After the above testing is completed, the output head needs to be fused to the output end of the fiber laser of the vehicle-mounted laser radar, and the process is relatively complex. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a laser tester device which improves testing efficiency and precision.
[0005] In order to realize the utility model purpose, the utility model provides a laser tester device, which comprises a coupling device, a power meter and a measuring equipment, the coupling device comprises a packaging shell, an output head clamp, an input collimating lens, a light splitting device, an output collimating lens, a first fiber collimator and a second fiber collimator, the output head clamp, the input collimating lens, the light splitting device, the output collimating lens, the first fiber collimator and the second fiber collimator are fixedly installed on the packaging shell, the output head clamp is used for clamping and fixing the output fiber of the laser, and the output fiber is in divergent output, the output head clamp, the input collimating lens, the light splitting device, the output collimating lens and the first fiber collimator are sequentially arranged along a transmission light path, the light splitting device and the second fiber collimator are sequentially arranged along a reflection light path, the light splitting device is provided with a transreflective film, the transmission end of the transreflective film faces the output collimating lens, and the reflection end of the transreflective film faces the second fiber collimator, the first fiber collimator is connected with the power meter through a first fiber, and the second fiber collimator is connected with the measuring equipment through a second fiber.
[0006] Further, the first fiber collimator is a multimode fiber collimator, and the first fiber is a multimode fiber.
[0007] Further, the second fiber collimator is a single-mode fiber collimator, and the second fiber is a single-mode fiber.
[0008] Further, the measuring equipment comprises a spectrometer, an oscilloscope, an autocorrelator, a frequency spectrometer or a pulse measuring instrument.
[0009] Further, the light splitting device is a depolarization light splitting prism or a light wedge.
[0010] In order to achieve the purpose of the utility model, the utility model provides a kind of laser testing device, including coupling device, power meter and measuring equipment;Coupling device includes package shell, output head fixture, light splitting device, output collimating lens, first fiber collimator and second fiber collimator, output head fixture, light splitting device, output collimating lens, first fiber collimator and second fiber collimator are fixedly installed on package shell;Output head fixture is used to hold and fix the output collimator of laser, and output collimator is collimated output;Output head fixture, light splitting device, output collimating lens and first fiber collimator are sequentially arranged along transmission light path, and light splitting device and second fiber collimator are sequentially arranged along reflection light path, and light splitting device is provided with transreflective film, and the transmission end of transreflective film is towards output collimating lens, and the reflection end of transreflective film is towards second fiber collimator;First fiber collimator is connected with power meter by first fiber, and second fiber collimator is connected with measuring equipment by second fiber.
[0011] Further, the first fiber collimator is a multimode fiber collimator, and the first fiber is a multimode fiber.
[0012] Further, the second fiber collimator is a single-mode fiber collimator, and the second fiber is a single-mode fiber.
[0013] Further, the measuring equipment includes a spectrometer, an oscilloscope, an autocorrelator, a frequency spectrometer or a pulse measuring instrument.
[0014] Further, the light splitting device is a depolarization light splitting prism or a light wedge.
[0015] The utility model has the advantages that the output head fixture can hold and fix the output fiber or output collimator of laser, and then can test two types of lasers, and the light splitting device splits the light into two beams by using transreflective film, one beam is output to the power meter, and the actual output power of the measured laser can be calculated by the transmission ratio, and the other beam is output to the spectrometer, oscilloscope and other measuring equipment to test the spectrum, pulse and other parameters, which can greatly improve the test efficiency and adaptability of the laser, in addition, the spectrum, pulse and other test beams are transmitted by the single-mode fiber collimator and single-mode fiber, which can improve the test accuracy without test distortion caused by random mode coupling, and the use of light splitting device can reduce the number of coupling devices in the test optical path, thereby simplifying the optical path structure. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the optical path schematic diagram of the first embodiment of the utility model laser testing device.
[0017] Figure 2 is a light path schematic view of the second embodiment of the laser testing device.
[0018] The utility model will be further described below in combination with the drawings and embodiments. DETAILED DESCRIPTION
[0019] The first embodiment of the testing device:
[0020] Referring to Figure 1 The laser testing device comprises a coupling device 2, a power meter 26 and a measuring device 28, the coupling device 2 comprises an encapsulation shell 20, an output head clamp 21, an input collimating lens 22, a light splitting device 23, an output collimating lens 24, a first optical fiber collimator 25 and a second optical fiber collimator 27, and the output head clamp 21, the input collimating lens 22, the light splitting device 23, the output collimating lens 24, the first optical fiber collimator 25 and the second optical fiber collimator 27 are fixedly installed on the encapsulation shell 20.
[0021] The output head clamp 21 is located on the left side wall of the encapsulation shell 20, and specifically, the output head clamp 21 can be arranged in the form of a fiber clamping cloth, which has a fiber groove and a clamping cover; the output optical fiber 111 of the laser 11 is placed in the fiber groove and can be clamped and fixed by the clamping cover; since the end of the output optical fiber 111 is not provided with a collimator, the output optical fiber 111 is in a divergent output state.
[0022] The output head clamp 21, the input collimating lens 22, the light splitting device 23, the output collimating lens 24 and the first optical fiber collimator 25 are arranged in sequence along the transmission light path; the optical axis of the output optical fiber 111 is coaxial with the optical axis of the input collimating lens 22; the output end surface of the clamped output optical fiber 111 is located at the focal point of the input collimating lens 22; the working axis of the light splitting device 23 is parallel to the optical axes of the input collimating lens 22 and the output collimating lens 24; and the first optical fiber collimator 25 is located at the focal point of the output collimating lens 24.
[0023] The light splitting device 23 and the second optical fiber collimator 27 are arranged in sequence along the reflection light path, and the transmission light path is perpendicular to the reflection light path; the light splitting device 23 is provided with a transmission-reflection film, which is arranged at an angle of 45° with respect to the transmission light path; the transmission end of the transmission-reflection film faces the output collimating lens 24; and the reflection end of the transmission-reflection film faces the second optical fiber collimator 27. In this embodiment, the light splitting device is arranged by coating the transmission-reflection film on an optical flat plate; the light splitting device can also be arranged by using a depolarization light splitting prism or an optical wedge, and the arrangement of the transmission-reflection film can also achieve light splitting.
[0024] The first fiber collimator 25 is connected with the power meter 26 through the first fiber 251, the first fiber collimator 25 is a multimode fiber collimator, and the first fiber 251 is a multimode fiber. The second fiber collimator 27 is connected with the measuring device 28 through the second fiber 271, and the measuring device 28 includes but is not limited to a spectrometer, an oscilloscope, an autocorrelator, a frequency spectrometer or a pulse measuring instrument. The second fiber collimator 27 is a single-mode fiber collimator, and the second fiber 271 is a single-mode fiber.
[0025] During the test, the laser is emitted from the output fiber 111, collimated by the input collimating lens 22, transmitted to the light splitting device 23, and the transmittance is preferably 90% and the reflectance is preferably 10%. 90% of the collimated light is transmitted from the light splitting device 23 to the output collimating lens 24, and 10% of the collimated light is reflected by the light splitting device 23 and transmitted to the second fiber collimator 27.
[0026] The part of the collimated light reflected by the light splitting device is coupled into the second fiber collimator 27 and transmitted to the parameter measuring device such as a spectrometer or an oscilloscope through fiber transmission, so as to realize the test of the spectrum and pulse parameters.
[0027] The collimated laser transmitted by the transmissive light splitting device 23 is converged after being transmitted to the output collimating lens 24, and then the high-efficiency coupling of the laser from the output fiber 111 to the first fiber collimator 25 is realized.
[0028] The first fiber collimator 25 outputs 90% of the light output by the laser to the power meter, and the actual output power of the measured laser can be converted by dividing the measured power P1 by 90%.
[0029] The second embodiment of the test device is as follows:
[0030] Referring to Figure 2 , the laser test device includes a coupling device 4, a power meter 46 and a measuring device 48. The coupling device 4 includes a packaging shell 40, an output head clamp 41, a light splitting device 43, an output collimating lens 44, a first fiber collimator 45 and a second fiber collimator 47. The output head clamp 41, the light splitting device 43, the output collimating lens 44, the first fiber collimator 45 and the second fiber collimator 47 are fixedly installed on the packaging shell 40.
[0031] The output head clamp 41 is located on the left side wall of the packaging shell 40. Specifically, the output head clamp 41 can be arranged in a fiber clamping manner and has a fiber slot and a clamping cover. The output collimator 122 of the laser 12 is placed in the fiber slot and can be clamped and fixed by the clamping cover. The output collimator 122 is connected with the laser 12 through the fiber 121, and the output collimator 122 is in a collimated output state.
[0032] The output collimator 122 on the output head clamp 41, the light splitting device 43, the output collimating lens 44 and the first fiber collimator 45 are arranged in sequence along the transmission light path, the working axis of the light splitting device 43 is parallel to the optical axis of the output collimating lens 44, and the first fiber collimator 45 is located at the focal point of the output collimating lens 44.
[0033] The light splitting device 43 and the second fiber collimator 47 are arranged in sequence along the reflection light path, the transmission light path is perpendicular to the reflection light path, the light splitting device 43 is provided with a transmissive-reflection film, the transmissive-reflection film is arranged at an angle of 45° inclined to the transmission light path, the transmission end of the transmissive-reflection film faces the output collimating lens 44, and the reflection end of the transmissive-reflection film faces the second fiber collimator 47. In this embodiment, the light splitting device is arranged by coating the transmissive-reflection film on the optical flat plate, and the light splitting device can also be arranged by using a depolarization light splitting prism or an optical wedge, and the arrangement of the transmissive-reflection film can also achieve light splitting.
[0034] The first fiber collimator 45 is connected with the power meter 46 through the first fiber 451, the first fiber collimator 45 is a multi-mode fiber collimator, and the first fiber 451 is a multi-mode fiber. The second fiber collimator 47 is connected with the measuring device 48 through the second fiber 471, the measuring device 48 includes but is not limited to a spectrometer, an oscilloscope, an autocorrelator, a frequency spectrometer or a pulse measuring instrument, the second fiber collimator 47 is a single-mode fiber collimator, and the second fiber 471 is a single-mode fiber.
[0035] During testing, the laser is collimated and output from the output collimator 122, transmitted to the light splitting device 43, the transmittance is preferably 90%, and the reflectance is preferably 10%, 90% of the collimated light is transmitted from the light splitting device 43 to the output collimating lens 44, and 10% of the collimated light is reflected by the light splitting device 43 and transmitted to the second fiber collimator 47.
[0036] The part of the collimated light reflected by the light splitting device is coupled into the second fiber collimator 47 and transmitted to the parameter measuring device such as a spectrometer or an oscilloscope through fiber transmission, so as to realize the testing of the parameters such as spectrum and pulse.
[0037] The collimated laser transmitted by the light splitting device 43 converges after being transmitted to the output collimating lens 44, and then high-efficiency coupling of the laser from the output fiber 111 to the first fiber collimator 45 is realized.
[0038] 90% of the light output from the laser is output to the power meter through the first fiber collimator 45, and the actual output power of the measured laser can be converted by dividing the measured power P1 by 90%.
[0039] From the above, by the output head clamp can be respectively on the output fiber or output collimator of the laser clamping fixed, in turn can adapt to two types of laser testing, and cooperate with the light splitting device using the transmission reflection film into two beams, a beam for output to the power meter, by the transmission ratio can be converted into the actual output power of the measured laser, another beam to the spectrometer, oscilloscope and other measuring equipment, the realization of spectral, pulse and other parameters of the test, it can greatly improve the testing efficiency and adaptability of the laser, in addition, spectral, pulse and other test beams through single mode fiber collimator and single mode fiber transmission, it does not exist because of random mode coupling leads to test distortion, to improve the testing accuracy, furthermore, through the use of light splitting device, reduce the use of the number of coupling device of the test optical path, in turn simplify the optical path structure.
Claims
1. A laser testing device, characterized in that, Includes coupling devices, power meters, and measuring equipment; The coupling device includes a package housing, an output head clamp, an input collimating lens, a beam splitter, an output collimating lens, a first fiber collimator, and a second fiber collimator. The output head clamp, the input collimating lens, the beam splitter, the output collimating lens, the first fiber collimator, and the second fiber collimator are fixedly mounted on the package housing. The output head clamp is used to hold and fix the output optical fiber of the laser, and the output optical fiber has a divergent output. The output head clamp, the input collimating lens, the beam splitter, the output collimating lens, and the first fiber collimator are arranged sequentially along the transmission optical path, and the beam splitter and the second fiber collimator are arranged sequentially along the reflection optical path. The beam splitter is provided with a transmissive-reflective film, with the transmission end of the transmissive-reflective film facing the output collimating lens and the reflection end of the transmissive-reflective film facing the second fiber collimator. The first fiber collimator is connected to the power meter via a first fiber, and the second fiber collimator is connected to the measuring device via a second fiber.
2. The laser testing apparatus according to claim 1, characterized in that: The first fiber collimator is a multimode fiber collimator, and the first fiber is a multimode fiber.
3. The laser testing apparatus according to claim 1, characterized in that: The second fiber collimator is a single-mode fiber collimator, and the second fiber is a single-mode fiber.
4. The laser testing apparatus according to claim 1, characterized in that: The measuring equipment includes a spectrometer, oscilloscope, autocorrelation analyzer, spectrum analyzer, or pulse measuring instrument.
5. The laser testing apparatus according to any one of claims 1 to 4, characterized in that: The beam splitting device is a depolarizing beam splitter prism or an optical wedge.
6. A laser testing device, characterized in that, Includes coupling devices, power meters, and measuring equipment; The coupling device includes a package housing, an output head clamp, a beam splitter, an output collimating lens, a first fiber collimator, and a second fiber collimator. The output head clamp, the beam splitter, the output collimating lens, the first fiber collimator, and the second fiber collimator are fixedly mounted on the package housing. The output head clamp is used to hold and fix the output collimator of the laser, and the output collimator outputs collimated output. The output head clamp, the beam splitter, the output collimating lens, and the first fiber collimator are arranged sequentially along the transmission optical path, and the beam splitter and the second fiber collimator are arranged sequentially along the reflection optical path. The beam splitter is provided with a transmissive-reflective film, with the transmission end of the transmissive-reflective film facing the output collimating lens and the reflection end of the transmissive-reflective film facing the second fiber collimator. The first fiber collimator is connected to the power meter via a first fiber, and the second fiber collimator is connected to the measuring device via a second fiber.
7. The laser testing apparatus according to claim 6, characterized in that: The first fiber collimator is a multimode fiber collimator, and the first fiber is a multimode fiber.
8. The laser testing apparatus according to claim 6, characterized in that: The second fiber collimator is a single-mode fiber collimator, and the second fiber is a single-mode fiber.
9. The laser testing apparatus according to claim 6, characterized in that: The measuring equipment includes a spectrometer, oscilloscope, autocorrelation analyzer, spectrum analyzer, or pulse measuring instrument.
10. The laser testing apparatus according to any one of claims 6 to 9, characterized in that: The beam splitting device is a depolarizing beam splitter prism or an optical wedge.