CN111707448A - Efficiency detection device and efficiency detection method for optical component of space laser communication terminal - Google Patents
Efficiency detection device and efficiency detection method for optical component of space laser communication terminal Download PDFInfo
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- CN111707448A CN111707448A CN202010430493.8A CN202010430493A CN111707448A CN 111707448 A CN111707448 A CN 111707448A CN 202010430493 A CN202010430493 A CN 202010430493A CN 111707448 A CN111707448 A CN 111707448A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/04—Optical benches therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
Abstract
The invention provides an efficiency detection device and an efficiency detection method for an optical component of a space laser communication terminal, which solve the problems that the efficiency of the optical component of the space laser communication terminal is lack of a test device and the test efficiency is low at present. The efficiency detection device comprises a light source, an optical fiber, a polarizer, a polarization beam splitter, a first power meter, a collimating mirror, an adjustable diaphragm, an 1/4 wave plate, a five-dimensional adjusting table and a second power meter; the optical fiber, the polarizer and the polarization spectroscope are sequentially arranged on an emergent light path of the light source; the collimating mirror, the 1/4 wave plate, the five-dimensional adjusting platform and the second power meter are sequentially arranged on a transmission light path of the polarizing beam splitter, and the first power meter is positioned on a reflection light path of the polarizing beam splitter; the adjustable diaphragm is arranged at the light outlet of the collimating mirror and is used for realizing the adjustment of the emergent light aperture of the collimating mirror.
Description
Technical Field
The invention belongs to the field of optical detection, and particularly relates to an efficiency detection device and an efficiency detection method for an optical component of a space laser communication terminal.
Background
Compared with the traditional microwave space communication mode, the space laser communication has the outstanding characteristics of wide band, high speed, strong interception and interference resistance, light weight, small size and the like, and is very suitable for information transmission among air-ground links, air-space links, space-ground links, interplanetary links and deep space links. With the development of the space remote sensing technology, the resolution of a space camera, the space of a spectrum instrument and the spectrum resolution are greatly improved, a large amount of space detection data needs to be transmitted to the ground in real time, technical personnel and experts are supplied to analyze and refine the space detection data, and the application value of the space instrument is realized. The bandwidth of the microwave commonly used on the current satellite is about hundred million, and is close to the theoretical limit of microwave communication. With the successful experiment of the 5.65G/s space laser communication terminal, the space laser communication terminal with the bit rate of dozens of gigas is also under research and planning, and the advantages of the space laser communication terminal in practical application are fully proved, so that the communication bandwidth bottleneck problem can be well solved by using laser as a medium for communication.
Chinese patent 201310446484.8 discloses a laser satellite-ground communication link test system suitable for remote sensing satellites, which comprises a ground terminal simulation system, a signal demodulation processing system and a data display terminal, mainly meets the requirements of the satellite on function and performance tests in a final assembly plant and large-scale environmental test states, can complete the transmission error rate test, data rate test and light energy measurement of uplink and downlink link light signals, and can complete the test of emission wavelength and emission efficiency. Chinese patent 201410708261.9 discloses a space laser communication ground test simulation platform, which can realize the end-machine level system test of multiple parameter direct alignment performance performed by two communication end machines at a close distance, and simulate multiple external factors affecting the space laser communication performance. Chinese patent 201410708299.6 discloses a space laser communication terminal-level system test method, which realizes space laser communication terminal-level system tests including tracking and pointing characteristics, capturing characteristics, communication characteristics, and the like. Chinese patent 201410708285.4 discloses a multifunctional space laser communication ground test system and a static parameter test method, wherein the test system includes a dynamic parameter test simulation platform for space laser communication and a static parameter measurement device, and a plane mirror is used to change static parameters or test dynamic parameters, wherein the static parameters include advanced aiming error, far field distribution, optical power and static pointing error. However, the above applications are all testing devices for indexes of a space laser communication system, and lack a testing device for efficiency of optical components of a space laser communication terminal, and meanwhile, if each space laser communication terminal optical component is to be tested separately, a transmission efficiency experimental platform and a reception efficiency experimental platform need to be set up respectively, so that testing efficiency is low.
Disclosure of Invention
The invention aims to solve the problems that a testing device for the efficiency of an optical component of a space laser communication terminal is lacked and the testing efficiency is low at present, and provides an efficiency detecting device and an efficiency detecting method for the optical component of the space laser communication terminal, which can realize the same-platform testing of the transmitting efficiency and the receiving efficiency of the optical component of the space laser communication terminal and accumulate data bases for the testing and calibration of the communication distance of a laser communication system.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
an efficiency detection device for an optical component of a space laser communication terminal comprises a light source, an optical fiber, a polarizer, a polarization beam splitter, a first power meter, a collimating mirror, an adjustable diaphragm, an 1/4 wave plate, a five-dimensional adjusting table and a second power meter; the optical fiber, the polarizer and the polarization spectroscope are sequentially arranged on an emergent light path of the light source; the collimating mirror, the 1/4 wave plate, the five-dimensional adjusting platform and the second power meter are sequentially arranged on a transmission light path of the polarizing beam splitter, and the first power meter is arranged on a reflection light path of the polarizing beam splitter; the adjustable diaphragm is arranged at the light outlet of the collimating mirror and is used for realizing the adjustment of the emergent light aperture of the collimating mirror; the center height of the second power meter is equal to the height of the light outlet of the collimating mirror, and the size of the detection surface of the second power meter is larger than the diameter of the exit pupil of the optical component of the space laser communication terminal to be detected; and the five-dimensional adjusting table is used for adjusting the position of the optical component of the space laser communication terminal to be measured.
Furthermore, one end of the optical fiber is connected with the light source, the other end of the optical fiber is connected with an optical fiber flange, the optical fiber flange is located at the focal plane position of the collimating mirror, and the emergent end face of the optical fiber is located at the focal point position of the collimating mirror.
Furthermore, the light source is a fiber laser, the wavelength is the working wavelength of the optical component of the space laser communication terminal to be detected, the working wavelength of the fiber covers the wavelength of the light source, and the working wavelengths of the polarizer, the polarization beam splitter and the 1/4 wave plate are the wavelength of the light source.
Further, the optical fiber is a single mode optical fiber or a multimode optical fiber.
Further, the focal length of the collimating lens is 300mm, the exit pupil size is 100mm, and the working wavelength range is 0.3-1.8 μm.
The invention also provides an emission efficiency detection method based on the device for detecting the efficiency of the optical component of the space laser communication terminal, which comprises the following steps:
placing an optical component of a measured space laser communication terminal on a five-dimensional adjusting table, wherein the optical component of the measured space laser communication terminal comprises an emitting optical lens and an emitting optical fiber;
connecting the transmitting fiber laser with the corresponding working wavelength with the transmitting fiber, and simultaneously connecting the transmitting fiber laser with a second power meter;
step three, transmitting the optical fiber laser to work, and adjusting a five-dimensional adjusting table to enable the optical axis of the optical component of the measured space laser communication terminal to coincide with the optical axis of the emergent beam of the optical fiber laser;
adjusting the adjustable diaphragm to enable the aperture of the adjustable diaphragm to be larger than the diameter of the exit pupil of the optical component of the measured space laser communication terminal;
step five, light beams emitted by the optical fiber laser enter the emission optical lens through the emission optical fiber, right-handed circularly polarized light emitted by the emission optical lens passes through the 1/4 wave plate, the adjustable diaphragm and the collimating mirror, is reflected by the polarization beam splitter to enter the first power meter, and the power P1 of the first power meter at the moment is recorded;
sixthly, the output light of the fiber laser is directly incident to the second power meter, and the power P of the second power meter at the moment is recorded2；
Step seven, calculating the emission efficiency β1；
Wherein, T1 is the transmittance of the collimating mirror under the wavelength of the light source;
T21/4 wave plate transmittance;
tp is the transmittance of the transmitted light by the polarizing beam splitter.
Meanwhile, the invention also provides a receiving efficiency detection method based on the device for detecting the efficiency of the optical component of the space laser communication terminal, which comprises the following steps:
placing an optical component of a measured space laser communication terminal on a five-dimensional adjusting table, wherein the optical component of the measured space laser communication terminal comprises a receiving optical lens;
step two, the light source works, and the five-dimensional adjusting table is adjusted to enable the optical axis of the optical component of the space laser communication terminal to be measured to coincide with the optical axis of the light source emergent beam;
adjusting an adjustable diaphragm of a light outlet of the collimating mirror to enable the aperture of the adjustable diaphragm to be smaller than the exit pupil of the optical component of the measured space laser communication terminal;
step four, the second power meter receives all emergent light of the optical component of the space laser communication terminal to be measured and records the power P of the second power meter at the moment3；
Step five, moving away the optical component of the space laser communication terminal to be detected, and enabling the output light of the adjustable diaphragm to pass through 1/4 wave plates and then to be completePartially incident on the second power meter, and recording the power P of the second power meter at the moment4；
Step six, calculating the receiving efficiency β2，β2＝P3/P4×100％。
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
1. the invention provides an efficiency detection device and an efficiency detection method for an optical component of a space laser communication terminal, which can test the efficiency of the optical component of the space laser communication terminal and enable the transmission precision of the space laser communication terminal to be more accurate on the basis of the test and calibration accumulated data of the communication distance of a laser communication system. Meanwhile, the efficiency detection device is simple in structure, convenient to use and easy to implement.
2. The invention provides an efficiency detection device for an optical component of a space laser communication terminal, which can realize the test of the transmitting efficiency and the receiving efficiency of the optical component of the space laser communication terminal on one platform, thereby improving the detection efficiency and being suitable for batch production.
Drawings
FIG. 1 is a schematic structural diagram of an optical component efficiency detection device of a space laser communication terminal according to the present invention;
FIG. 2 is a schematic diagram of the emission efficiency test of the optical component of the space laser communication terminal according to the present invention;
fig. 3 is a schematic diagram of a receiving efficiency test of the optical component of the space laser communication terminal according to the present invention.
Reference numerals: 101-a light source; 102-an optical fiber; 103-fiber flange; 104-polarizer; 105-a polarizing beamsplitter; 106-a first power meter; 107-a collimating mirror; 108-an adjustable diaphragm; 109-1/4 wave plates; 110-five-dimensional adjusting table; 111-space laser communication terminal optics; 112-a second power meter; 201-an emission optical lens; 202-transmitting fiber, 203-transmitting fiber laser, 204-receiving optical lens.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
The invention provides an efficiency detection device and an efficiency detection method for an optical component of a space laser communication terminal, which can realize the same-platform test of the transmitting efficiency and the receiving efficiency of the optical component of the space laser communication terminal.
As shown in fig. 1, the device for detecting the efficiency of the optical component of the space laser communication terminal of the present invention includes a light source 101, an optical fiber 102, an optical fiber flange 103, a polarizer 104, a polarization beam splitter 105, a first power meter 106, a collimating mirror 107, an adjustable diaphragm 108, an 1/4 wave plate 109, a five-dimensional adjusting stage 110, and a second power meter 112. The optical fiber 102, the polarizer 104 and the polarization beam splitter 105 are sequentially arranged on an emergent light path of the light source 101; the collimating mirror 107, the 1/4 wave plate 109, the five-dimensional adjusting stage 110, and the second power meter 112 are sequentially disposed on the transmission light path of the polarization beam splitter 105, and the first power meter 106 is disposed on the reflection light path of the polarization beam splitter 105. Meanwhile, the exit end face of the optical fiber 102 is located at the focal position of the collimating mirror 107 in the transmission direction of the polarizing beam splitter 105, and the five-dimensional adjusting stage 110 is used for adjusting the position of the optical component 111 of the measured space laser communication terminal. The adjustable diaphragm 108 is located at the light exit of the collimator 107, so as to adjust the aperture of the light emitted from the collimator 107 to match with the optical components 111 of the laser communication terminals in different spaces, when the emission efficiency is tested, the aperture of the adjustable diaphragm 108 is larger than the exit pupil diameter of the optical components 111 of the laser communication terminals in the space to be tested, and when the receiving efficiency is tested, the aperture of the adjustable diaphragm 108 is smaller than the exit pupil diameter of the optical components 111 of the laser communication terminals in the space to be tested.
In the efficiency detection device of the invention, two ends of an optical fiber 102 are respectively connected with a light source 101 and an optical fiber flange 103, the optical fiber flange 103 is positioned at the focal plane position of a collimating mirror 107, the emergent end surface of the optical fiber 102 is positioned at the focal point position of the collimating mirror 107 in the transmission direction of a polarization beam splitter 105, and a first power meter 106 is positioned at the focal point position of the collimating mirror 107 in the reflection direction of the polarization beam splitter 105. The center height of the second power meter 112 is equal to the height of the light outlet of the collimating lens 107, and the size of the detection surface of the second power meter 112 is larger than the diameter of the exit pupil of the optical component 111 of the space laser communication terminal to be detected.
In the efficiency detection device of the present invention, the wavelength of the light source 101 is the working wavelength of the optical component 111 of the space laser communication terminal to be detected, and the working wavelength of the optical fiber 102 covers the light source101 wavelength, the working wavelength of the polarizer 104, the polarization beam splitter 105 and the 1/4 wave plate 109 is the light source 101 wavelength, the transmittance of the transmission light of the polarization beam splitter 105 is Tp, the reflectance of the reflection light is Rs, and the transmittance of the collimating mirror 107 is T under the light source 101 wavelength1Has polarization-maintaining property, and 1/4 wave plate 109 has a transmittance of T2。
When the receiving efficiency is tested, a light beam emitted by the light source 101 enters the polarizer 104 through the optical fiber 102, linearly polarized light is emitted, the polarization beam splitter 105 transmits p light, the p light becomes parallel light after passing through the collimating mirror 107, the aperture of the emitted light beam is changed by the adjustable diaphragm 108, the emitted light beam is changed into left-handed circularly polarized light through the 1/4 wave plate 109, the optical axis of the optical component 111 of the space laser communication terminal to be tested is enabled to coincide with the optical axis of the emitted parallel light beam by adjusting the five-dimensional adjusting stage 110, and the light beam enters the second power meter 112 through the receiving branch of the space laser communication terminal to be tested.
During the emission efficiency test, the five-dimensional adjusting stage 110 is adjusted to make the optical axis of the optical component 111 of the space laser communication terminal to be tested coincide with the optical axis of the emergent parallel light beam, and the right-handed circularly polarized light emitted by the emission branch passes through the 1/4 wave plate 109 to become s-light, passes through the adjustable diaphragm 108 and the collimator 107, and is reflected by the polarization beam splitter 105 to enter the first power meter 106.
In the embodiment of the present invention, the light source 101 is a fiber laser, or a space laser + a converging mirror, the wavelength of which is 1550nm, the operating wavelength of the optical component 111 of the space laser communication terminal, the optical fiber 102 is a single-mode optical fiber, the core diameter is 5 μm, and both ends are respectively connected to the light source 101 and the optical fiber flange 103. The focal length range of the optical component 111 of the space laser communication terminal is 20mm to 100 mm. The focal length of the collimating mirror 107 is 300mm, the exit pupil size is 100mm, all optical elements are reflectors, the working wavelength range is 0.3-1.8 μm, and the polarization maintaining characteristic is provided at 1550 nm.
Based on the fact that factors influencing the emission efficiency of the optical component of the space laser communication terminal to be detected comprise the transmittance and the polarization loss of an optical element at the working wavelength, as shown in fig. 2, the method for detecting the emission efficiency of the optical component of the space laser communication terminal comprises the following steps:
placing an optical component 111 of a measured space laser communication terminal on a five-dimensional adjusting table 110, wherein the optical component 111 of the measured space laser communication terminal comprises an emitting optical lens 201 and an emitting optical fiber 202 which are connected;
step two, connecting the transmitting fiber laser 203 corresponding to the working wavelength with the transmitting fiber 202, and simultaneously connecting the transmitting fiber laser 203 with the second power meter 112;
step three, the fiber laser 203 works, and the five-dimensional adjusting table 110 is adjusted to enable the optical axis of the optical component 111 of the measured space laser communication terminal to coincide with the optical axis of the emergent beam of the fiber laser 203;
step four, adjusting the adjustable diaphragm 108 to enable the aperture of the adjustable diaphragm 108 to be larger than the diameter of the exit pupil of the optical component 111 of the measured space laser communication terminal;
step five, the light beam emitted by the emission fiber laser 203 enters the emission optical lens 201 through the emission optical fiber 202, the right-handed circularly polarized light emitted by the emission optical lens 201 passes through the 1/4 wave plate 109, the adjustable diaphragm 108 and the collimating mirror 107, is reflected by the polarization beam splitter 105 to enter the first power meter 106, and the power P1 of the first power meter 106 at the moment is recorded;
sixthly, the output light of the fiber laser 203 is directly incident to the second power meter 112, and the power P of the second power meter 112 at the moment is recorded2；
Step seven, calculating the emission efficiency β1；
Wherein, T1 is the transmittance of the collimating mirror 107 at the wavelength of the light source 101;
T21/4, the transmittance of wave plate 109;
tp is the transmittance of the light transmitted by the polarization beam splitter 105.
As shown in fig. 3, the method for detecting the receiving efficiency of the optical component of the space laser communication terminal according to the present invention comprises the following steps:
placing an optical component 111 of a measured space laser communication terminal on a five-dimensional adjusting table 110, wherein the optical component 111 of the measured space laser communication terminal comprises a receiving optical lens 204;
step two, the light source 101 works, and the five-dimensional adjusting table 110 is adjusted to enable the optical axis of the optical component 111 of the detected space laser communication terminal to coincide with the optical axis of the light beam emitted by the light source 101;
step three, adjusting an adjustable diaphragm 108 of a light outlet of a collimating lens 107 to enable the aperture of the adjustable diaphragm to be smaller than the exit pupil of an optical component 111 of the measured space laser communication terminal;
step four, the second power meter 112 receives all the emergent light of the optical component 111 of the space laser communication terminal to be measured, and records the power P of the second power meter 112 at the moment3；
Step five, moving away the optical component 111 of the measured space laser communication terminal, making the output light of the adjustable diaphragm 108 pass through the 1/4 wave plate 109 and then totally enter the second power meter 112, and recording the power P of the second power meter 112 at the moment4；
Step six, calculating the receiving efficiency β2，β2＝P3/P4×100％。
The invention adopts the polarization beam splitter 105, the 1/4 wave plate 109 and the adjustable diaphragm 108 to realize the same-platform test of the transmitting efficiency and the receiving efficiency of the optical component 111 of the space laser communication terminal, improves the assembly detection efficiency and is suitable for batch production.
Claims (7)
1. An optical component efficiency detection device of a space laser communication terminal is characterized in that: the device comprises a light source (101), an optical fiber (102), a polarizer (104), a polarization beam splitter (105), a first power meter (106), a collimating mirror (107), an adjustable diaphragm (108), an 1/4 wave plate (109), a five-dimensional adjusting table (110) and a second power meter (112);
the optical fiber (102), the polarizer (104) and the polarization beam splitter (105) are sequentially arranged on an emergent light path of the light source (101);
the collimating mirror (107), the 1/4 wave plate (109), the five-dimensional adjusting table (110) and the second power meter (112) are sequentially arranged on a transmission light path of the polarizing beam splitter (105), and the first power meter (106) is arranged on a reflection light path of the polarizing beam splitter (105);
the adjustable diaphragm (108) is arranged at a light outlet of the collimating mirror (107) and is used for adjusting the aperture of emergent light of the collimating mirror (107);
the five-dimensional adjusting platform (110) is used for adjusting the position of the optical component (111) of the space laser communication terminal to be measured, the center height of the second power meter (112) is equal to the height of the light outlet of the collimating mirror (107), and the size of the detection surface of the second power meter (112) is larger than the diameter of the exit pupil of the optical component (111) of the space laser communication terminal to be measured.
2. The apparatus for detecting efficiency of optical parts of a space laser communication terminal according to claim 1, wherein: one end of the optical fiber (102) is connected with the light source (101), the other end of the optical fiber is connected with the optical fiber flange (103), the optical fiber flange (103) is located at the focal plane position of the collimating mirror (107), and the emergent end face of the optical fiber (102) is located at the focal point position of the collimating mirror (107).
3. The apparatus for detecting efficiency of optical parts of a space laser communication terminal according to claim 1 or 2, wherein: the light source (101) is a fiber laser, the wavelength is the working wavelength of the optical component (111) of the space laser communication terminal to be detected, the working wavelength of the optical fiber (102) covers the wavelength of the light source (101), and the working wavelengths of the polarizer (104), the polarization beam splitter (105) and the 1/4 wave plate (109) are the wavelength of the light source (101).
4. The apparatus for detecting efficiency of optical parts of a space laser communication terminal according to claim 3, wherein: the optical fiber (102) is a single mode optical fiber or a multimode optical fiber.
5. The apparatus for detecting efficiency of optical parts of a space laser communication terminal according to claim 4, wherein: the focal length of the collimating lens (107) is 300mm, the exit pupil size is 100mm, and the working wavelength range is 0.3-1.8 μm.
6. An emission efficiency detection method based on the efficiency detection device for the optical components of the space laser communication terminal according to any one of claims 1 to 5, characterized by comprising the following steps:
placing an optical component of a measured space laser communication terminal on a five-dimensional adjusting table, wherein the optical component of the measured space laser communication terminal comprises an emitting optical lens and an emitting optical fiber;
connecting the transmitting fiber laser with the corresponding working wavelength with the transmitting fiber, and simultaneously connecting the transmitting fiber laser with a second power meter;
step three, transmitting the optical fiber laser to work, and adjusting a five-dimensional adjusting table to enable the optical axis of the optical component of the measured space laser communication terminal to coincide with the optical axis of the emergent beam of the optical fiber laser;
adjusting the adjustable diaphragm to enable the aperture of the adjustable diaphragm to be larger than the diameter of the exit pupil of the optical component of the measured space laser communication terminal;
step five, light beams emitted by the optical fiber laser enter the emission optical lens through the emission optical fiber, right-handed circularly polarized light emitted by the emission optical lens passes through the 1/4 wave plate, the adjustable diaphragm and the collimating mirror, is reflected by the polarization beam splitter to enter the first power meter, and the power P1 of the first power meter at the moment is recorded;
sixthly, the output light of the fiber laser is directly incident to the second power meter, and the power P of the second power meter at the moment is recorded2；
Step seven, calculating the emission efficiency β1；
Wherein, T1 is the transmittance of the collimating mirror under the wavelength of the light source;
T21/4 wave plate transmittance;
tp is the transmittance of the transmitted light by the polarizing beam splitter.
7. A reception efficiency detection method based on the optical component efficiency detection device of the space laser communication terminal according to any one of claims 1 to 5, characterized in that:
placing an optical component of a measured space laser communication terminal on a five-dimensional adjusting table, wherein the optical component of the measured space laser communication terminal comprises a receiving optical lens;
step two, the light source works, and the five-dimensional adjusting table is adjusted to enable the optical axis of the optical component of the space laser communication terminal to be measured to coincide with the optical axis of the light source emergent beam;
adjusting an adjustable diaphragm of a light outlet of the collimating mirror to enable the aperture of the adjustable diaphragm to be smaller than the exit pupil of the optical component of the measured space laser communication terminal;
step four, the second power meter receives all emergent light of the optical component of the space laser communication terminal to be measured and records the power P of the second power meter at the moment3；
Step five, moving away the optical component of the space laser communication terminal to be measured, enabling the output light of the adjustable diaphragm to pass through the 1/4 wave plate and then to be totally incident into the second power meter, and recording the power P of the second power meter at the moment4；
Step six, calculating the receiving efficiency β2，β2＝P3/P4×100％。
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| 陈纯毅 等: "飞机对卫星激光通信上行链路建模与功率分析", 《通信学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115096556A (en) * | 2022-07-18 | 2022-09-23 | 东莞市鼎力自动化科技有限公司 | Optical film optical axis angle detection method and device and bonding process |
| CN115096556B (en) * | 2022-07-18 | 2023-10-31 | 东莞市鼎力自动化科技有限公司 | Optical film optical axis angle detection method and device and laminating process |
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| CN111707448B (en) | 2021-06-22 |
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