CN102798961A - Laser load for indoor test of laser communication terminal - Google Patents
Laser load for indoor test of laser communication terminal Download PDFInfo
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- CN102798961A CN102798961A CN2012102191381A CN201210219138A CN102798961A CN 102798961 A CN102798961 A CN 102798961A CN 2012102191381 A CN2012102191381 A CN 2012102191381A CN 201210219138 A CN201210219138 A CN 201210219138A CN 102798961 A CN102798961 A CN 102798961A
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- shaped chamber
- ball shaped
- communication terminal
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Abstract
A laser load for indoor test of a laser communication terminal comprises a base, a metal spherical cavity, a conical reflector, a rotating reflector, a connecting rod, a direct-current motor, a connector, a radiating flange and the like, wherein cast iron is used as the substrate material of the metal spherical cavity and the internal surface of the metal spherical cavity is subjected to sandblasting and spray-painting treatment previously; the conical reflector has an appropriate field angle; the direct-current motor controls a rotatable plane reflector to rotate at a rate of 1 degree per second; and the surfaces of the reflectors are all coated with alumium films and protective layers. The laser load can be applied to absorbing laser in the indoor test of the laser communication terminal, and further is high in absorption gain, small in structure volume and long in service life.
Description
Technical field
The present invention relates to a kind of laser load that high power laser absorbs that is used for, particularly a kind of laser load that is used for the test of laser communication terminal room build-in test.
Background technology
The laser load is a kind of through laser power being converted into the approach of heat energy, and realizes high power laser is absorbed the device that ends.Because laser repeated link distance is tens thousand of kilometers (being 45000km to the maximum), and acquisition sensitivity is limited, and (approximately-75dB), so the space transmission attenuation is serious, and the relaying star laser communication terminal that requires to initiate to catch possesses sufficiently high emergent pupil luminous power (more than the 5W).Carry out system integration when test indoor, the laser power output of several watts of magnitudes all will cause serious harm to human eye and optical device.Therefore, must adopt suitable laser load in the test, absorb to remove to test and carry out necessary light laser power.
Summary of the invention
Technology of the present invention is dealt with problems and is: the deficiency that overcomes prior art; A kind of laser load that is used for laser communication terminal room build-in test is provided; Through reasonable structural design such as spherical cavity, taper catoptron and rotating mirrors, can be in the process of the test omnidistance high power laser energy that absorbs must laser energy except that test institute.
Technical solution of the present invention is:
A kind of laser load that is used for laser communication terminal room build-in test comprises pedestal, metal ball shaped chamber, taper catoptron, rotating mirror, connecting link, direct current generator, connector, shielded cable and heat radiator;
Pedestal and metal ball shaped chamber weld together; A plurality of heat radiator are housed the outside surface in metal ball shaped chamber and surface, metal ball shaped chamber has a circular hole to be used to receive laser; The taper catoptron is used to increase the reception bore that receives laser through the circular hole place of bolts assemblies on surface, metal ball shaped chamber;
Rotating mirror and connecting link through screw retention together and the angle between rotating mirror and the connecting link be 45 °; Rotating mirror is that the junction of circle and rotating mirror and connecting link is the center of circle of rotating mirror; Connecting link passes metal ball shaped chamber and is connected with direct current generator; Direct current generator is fixed on the outside surface in metal ball shaped chamber and direct current generator can be controlled integral body that rotating mirror and connecting link form in the rotation of the inside in metal ball shaped chamber, and direct current generator is connected with connector through shielded cable;
Rotating mirror is parallel with the installation tangent plane of direct current generator on metal ball shaped chamber with the surfaces of revolution of integral body inner rotation in metal ball shaped chamber that connecting link is formed.
The external diameter in said metal ball shaped chamber is 470～570mm, and internal diameter is 450～550mm, and the bore of surperficial circular hole is 18～22mm;
The bore of surface, said metal ball shaped chamber circular hole and the ratio of metal ball shaped chamber internal diameter are 1/25,
The inside surface in said metal ball shaped chamber adopts the sandblast and the processing of spraying paint, and the sandblast particle diameter is 0.5～2mm, spray paint for reflectivity more than or equal to 97% Berlin black.
Said taper catoptron receiving port diameter is 45～60mm, and subtended angle is 30～40 °.
Said rotating mirror diameter is 25～50mm.
The integral body that rotating mirror and connecting link are formed is at the 1 °/s of rotational speed of the inner rotation in metal ball shaped chamber.
The present invention's beneficial effect compared with prior art is:
(1) adopts the unique laser load overall construction design of the present invention, can reach-gain of 50dB laser absorption;
(2) the present invention adopts taper receiving front-end disposal route, catches under the operating mode at the laser communication terminal scanning, under the incomplete alignment case of optical axis, does not still influence the laser load and absorbs gain; And can not cause light echo that laser communication terminal test test is formed disturbs.
(3) the present invention adopts the rotating mirror disposal route; Before strong beam shines the absorbing cavity inside surface; Utilize a rotatable plane mirror that incident beam is reflexed to ring belt area in the chamber; Power density when making laser beam shine spherical shell and energy density reduce, and evade the strong characteristics of high power laser lethality, effectively prolong the laser loaded work piece life-span.
Description of drawings
Fig. 1 is used for the laser support structures figure of laser communication terminal room build-in test for the present invention;
Fig. 2 is used for the laser loaded work piece schematic diagram of laser communication terminal room build-in test for the present invention;
Embodiment
As shown in Figure 1; The invention provides a kind of laser load that is used for laser communication terminal room build-in test, comprise pedestal 1, metal ball shaped chamber 2, taper catoptron 3, rotating mirror 4, connecting link 5, direct current generator 6, connector 7, shielded cable 8 and heat radiator 9;
Rotating mirror 4 and connecting link 5 through screw retention together and the angle between rotating mirror 4 and the connecting link 5 be 45 °; Rotating mirror 4 is the center of circle of rotating mirror 4 for the junction of circle and rotating mirror 4 and connecting link 5; Connecting link 5 passes metal ball shaped chamber 2 and is connected with direct current generator 6; Direct current generator 6 is fixed on the outside surface in metal ball shaped chamber 2 and direct current generator 6 can be controlled integral body that rotating mirror 4 and connecting link 5 form in the rotation of the inside in metal ball shaped chamber 2; Rotating mirror 4 is parallel with the installation tangent plane of direct current generator 6 on metal ball shaped chamber 2 at the surfaces of revolution of metal ball shaped chamber 2 inner rotations with the integral body that connecting link 5 is formed, and direct current generator 6 is connected with connector 7 through shielded cable 8.
Metal ball shaped chamber 2 is laser load agent structures; Casting iron is base material, and the spherical cavity overall diameter is 470～570, and internal diameter is 450～550mm; The opening bore is 18～22mm, and the bore of surface, metal ball shaped chamber circular hole and the ratio of metal ball shaped chamber internal diameter are 1/25; Inside surface is adopted the sandblast and the processing of spraying paint, realize high-absorbility, the sandblast particle diameter is 0.5～2mm, and the material that sprays paint is that reflectivity reaches the Berlin black more than 97%;
Rotating mirror 4 receiving port diameters are 25～50mm, and with 45 ° at horizontal direction inclination angle, 1 °/s of rotational speed forms absorption band in inside cavity, effectively reduces instantaneous power density, prolongs the laser loaded work piece life-span.Plane mirror uses microcrystal glass material as substrate, outside surface aluminizer and SiO
2Protective seam.
Taper catoptron 3 receiving port diameters are 45～60mm, and subtended angle is 30～40 °.Laser load operate as normal when guaranteeing laser oblique incidence; Test at the demonstration and verification scan capture; The high power beacon beam of laser terminal output need carry out spiral scan within certain angular range; Can not incide the situation that absorbs cavity fully for fear of beacon light beam in scanning process, the reflective reception structure of design taper.Catoptron adopts microcrystal glass material as substrate, outside surface aluminizer and SiO
2Protective seam.Catoptron uses jackscrew to be installed on the aluminium matter mechanical structured member, and mechanical structured member uses bolt to be connected with laser load spherical cavity.
Metal ball shaped chamber 2 outside surfaces are equipped with a plurality of heat radiator 9, and can adopt with 50mm among the present invention is at interval heat radiator to be installed, and heat sink sizes is 100mm * 60mm * 5mm, adopt screw to be connected with cavity.
Principle of work of the present invention: as shown in Figure 2; The light beam that send at the laser communication terminal is through one-dimensional scanning mirror, off-axis aspheric surface reflector group; Realize the compression of light beam geometric ratio, the light beam after the compression is realized beam splitting through behind the vibration simulator at spectroscope I place; Spectroscope I reflectivity is 10%, and transmitance is 90%.After spectroscope I beam reflected is passed through spectroscope II again, send into and catch with monitor CCD.Reference light source is that terminal to be measured provides and catches with target light source.Light beam through spectroscope I transmission is sent into the laser load, realizes absorbing and ends.When light beam normal incidence gets into the laser load, need not the taper mirror reflects, directly, incide metal ball shaped inner cavity surface, form absorption band, realize that luminous power absorbs through the rotary plane reflecting mirror light path of turning back; When the non-normal incidence of light beam got into the laser load, the oblique incidence light beam reflected this through the taper catoptron, and final all the entering in the metal ball shaped chamber realizes that luminous power absorbs.
Claims (8)
1. laser load that is used for laser communication terminal room build-in test is characterized in that: comprise pedestal (1), metal ball shaped chamber (2), taper catoptron (3), rotating mirror (4), connecting link (5), direct current generator (6), connector (7), shielded cable (8) and heat radiator (9);
Pedestal (1) welds together with metal ball shaped chamber (2); A plurality of heat radiator (9) are housed the outside surface in metal ball shaped chamber (2) and surface, metal ball shaped chamber (2) has a circular hole to be used to receive laser; Taper catoptron (3) is used to increase the reception bore that receives laser through the circular hole place of bolts assemblies on metal ball shaped chamber (2) surface;
Rotating mirror (4) and connecting link (5) through screw retention together and the angle between rotating mirror (4) and the connecting link (5) be 45 °; Rotating mirror (4) is the center of circle of rotating mirror (4) for the junction of circle and rotating mirror (4) and connecting link (5); Connecting link (5) passes metal ball shaped chamber (2) and is connected with direct current generator (6); Direct current generator (6) is fixed on the outside surface of metal ball shaped chamber (2) and direct current generator (6) can be controlled integral body that rotating mirror (4) and connecting link (5) form in the inside of metal ball shaped chamber (2) rotation, and direct current generator (6) is connected with connector (7) through shielded cable (8).
2. a kind of laser load that is used for laser communication terminal room build-in test according to claim 1 is characterized in that: rotating mirror (4) is parallel with the installation tangent plane of direct current generator (6) on metal ball shaped chamber (2) at the surfaces of revolution of metal ball shaped chamber (2) inner rotation with the integral body that connecting link (5) is formed.
3. a kind of laser load that is used for laser communication terminal room build-in test according to claim 1, it is characterized in that: the external diameter in said metal ball shaped chamber (2) is 470～570mm, and internal diameter is 450～550mm, and the bore of surperficial circular hole is 18～22mm.
4. a kind of laser load that is used for laser communication terminal room build-in test according to claim 3 is characterized in that: the ratio of the bore of the surperficial circular hole in said metal ball shaped chamber (2) and metal ball shaped chamber (2) internal diameter is 1/25.
5. according to claim 1 or 3 described a kind of laser loads that are used for laser communication terminal room build-in test; It is characterized in that: the inside surface in said metal ball shaped chamber (2) adopts the sandblast and the processing of spraying paint; The sandblast particle diameter is 0.5～2mm, spray paint for reflectivity more than or equal to 97% Berlin black.
6. a kind of laser load that is used for laser communication terminal room build-in test according to claim 1 is characterized in that: said taper catoptron (3) receiving port diameter is 45～60mm, and subtended angle is 30～40 °.
7. a kind of laser load that is used for laser communication terminal room build-in test according to claim 1 is characterized in that: said rotating mirror (4) diameter is 25～50mm.
8. a kind of laser load that is used for laser communication terminal room build-in test according to claim 1 is characterized in that: the integral body that rotating mirror (4) and connecting link (5) are formed is at the 1 °/s of rotational speed of metal ball shaped chamber (2) inner rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210219138.1A CN102798961B (en) | 2012-06-20 | 2012-06-20 | Laser load for indoor test of laser communication terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210219138.1A CN102798961B (en) | 2012-06-20 | 2012-06-20 | Laser load for indoor test of laser communication terminal |
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| Publication Number | Publication Date |
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| CN102798961A true CN102798961A (en) | 2012-11-28 |
| CN102798961B CN102798961B (en) | 2015-04-22 |
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| CN201210219138.1A Active CN102798961B (en) | 2012-06-20 | 2012-06-20 | Laser load for indoor test of laser communication terminal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133295A (en) * | 2014-08-20 | 2014-11-05 | 南京中科神光科技有限公司 | Laser beam absorption device |
| CN104363052A (en) * | 2014-11-21 | 2015-02-18 | 索尔思光电（成都）有限公司 | Method for decreasing crosstalk of optical signals in optical cavity and optical module using method |
| CN105067449A (en) * | 2015-08-01 | 2015-11-18 | 中国人民解放军国防科学技术大学 | Heat insulation apparatus capable of transmitting tension and pressure |
| CN111257233A (en) * | 2020-03-24 | 2020-06-09 | 河南中原光电测控技术有限公司 | Extinction device |
Citations (3)
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| JPH0415528A (en) * | 1990-05-10 | 1992-01-20 | Toshiba Corp | Laser light attenuating device |
| CN2665682Y (en) * | 2003-12-01 | 2004-12-22 | 中国科学院安徽光学精密机械研究所 | Device for measuring diffuse reflection integral laser power energy |
| CN202110331U (en) * | 2011-05-17 | 2012-01-11 | 南京波长光电科技有限公司 | Laser energy adjuster |
-
2012
- 2012-06-20 CN CN201210219138.1A patent/CN102798961B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0415528A (en) * | 1990-05-10 | 1992-01-20 | Toshiba Corp | Laser light attenuating device |
| CN2665682Y (en) * | 2003-12-01 | 2004-12-22 | 中国科学院安徽光学精密机械研究所 | Device for measuring diffuse reflection integral laser power energy |
| CN202110331U (en) * | 2011-05-17 | 2012-01-11 | 南京波长光电科技有限公司 | Laser energy adjuster |
Non-Patent Citations (1)
| Title |
|---|
| 刘锡民等: "《星间激光通讯中的精跟踪研究》", 《物理学报》, vol. 54, no. 11, 30 November 2005 (2005-11-30), pages 5149 - 5156 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133295A (en) * | 2014-08-20 | 2014-11-05 | 南京中科神光科技有限公司 | Laser beam absorption device |
| CN104363052A (en) * | 2014-11-21 | 2015-02-18 | 索尔思光电（成都）有限公司 | Method for decreasing crosstalk of optical signals in optical cavity and optical module using method |
| CN105067449A (en) * | 2015-08-01 | 2015-11-18 | 中国人民解放军国防科学技术大学 | Heat insulation apparatus capable of transmitting tension and pressure |
| CN111257233A (en) * | 2020-03-24 | 2020-06-09 | 河南中原光电测控技术有限公司 | Extinction device |
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| CN102798961B (en) | 2015-04-22 |
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