CN204857656U - A gas mercury discharge lamp that is used for ultraviolet scatter communication to have a photomultiplier transmission negative pole - Google Patents
A gas mercury discharge lamp that is used for ultraviolet scatter communication to have a photomultiplier transmission negative pole Download PDFInfo
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- CN204857656U CN204857656U CN201520641181.6U CN201520641181U CN204857656U CN 204857656 U CN204857656 U CN 204857656U CN 201520641181 U CN201520641181 U CN 201520641181U CN 204857656 U CN204857656 U CN 204857656U
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Abstract
A gas mercury discharge lamp that is used for ultraviolet scatter communication to have a photomultiplier transmission negative pole belongs to the photoelectrical technique field. The present uv light source signal transmission speed of can modulating is low. The utility model discloses its characterized in that, quartzy glass bulb inner chamber are separated by the transmission -type negative pole and are electron multiplication chamber and glow discharge chamber, photocathode, microchannel plate are located the electron multiplication chamber, and the electron multiplication chamber is the vacuum cavity, the positive pole is located the glow discharge chamber, and the glow discharge chamber is the low pressure chamber, is filled with mercury vapour and argon gas, the structure of transmission -type negative pole does, inlays array micropore glass board in the middle of ring form aluminum sheet opens the brightness negative pole, and array micropore glass board has plated the aluminium membrane towards the one end in electron multiplication chamber and has getted over the negative pole, opens the brightness negative pole and gets over the negative pole short circuit, microchannel plate includes one end and voltage transmission -type negative pole between and voltage transmission -type negative pole and positive pole between of microchannel plate towards the transmission -type negative pole towards the one end and the voltage between the positive pole of transmission -type negative pole, it triggers the light source to set up the infrared laser in the electron multiplication chamber outer end of quartzy glass bulb.
Description
Technical field
The utility model relates to a kind of bicycle pump discharge lamp for ultraviolet scatter communication with photomultiplier transit transmissive cathode, belongs to field of photoelectric technology.
Background technology
Ultraviolet scatter communication is a kind of local secure communication mode, utilize day-old chick (200 ~ 300nm) ultraviolet light as the carrier of information transmission, utilize the scattering of atmospheric particles to ultraviolet light to realize information transmission, belong to non-line-of-sight (NonLineofSight) optical communication.
The light source mainly ultraviolet gaseous discharge lamp of ultraviolet scatter communication system, as mercury gas electric discharge Non-polarized lamp.This Non-polarized lamp is that electric ballast is powered by high frequency switch power, electric ballast can produce the alternating current higher than more than 1.5MHz operating frequency, this alternating current makes to form induced current in fluorescent tube by a pair iron core be enclosed within outside fluorescent tube by the alternating magnetic field produced after coil, thus low-pressure mercury and inert gas are discharged as the mixed vapour of argon gas, give off the ultraviolet of 253.7nm.Modulate described high frequency alternating current by primary signal, the ultraviolet of institute's radiation just becomes the communication electromagnetism ripple of this primary signal of carrying.
Although described Non-polarized lamp transmitting power, up to a watt level, can meet the requirement of ultraviolet scatter communication distance.Although operating frequency brings up to 3.7MHz in the prior art, for communication, described operating frequency is too low, and after being modulated by primary signal, this frequency also will reduce, and this makes last communications speed generally can not more than 100Kbps.Therefore, this light source can not meet the requirement of high-speed communication.
Visible, still lack a kind of ultraviolet source modulated having high transmit power, high transfer rate feature concurrently in the prior art.
Utility model content
In order to obtain a kind of ultraviolet source modulated having high transmit power, high transfer rate feature concurrently, we have invented a kind of bicycle pump discharge lamp for ultraviolet scatter communication with photomultiplier transit transmissive cathode, adopt this discharge lamp, while guarantee ultraviolet emission power, significantly improve the switching rate of Ultraviolet Communication light source, thus improve communications speed.
The bicycle pump discharge lamp having a photomultiplier transit transmissive cathode for ultraviolet scatter communication of the utility model arranges photocathode in one end of quartz crust inner chamber, the other end arranges anode, between photocathode and anode, close on photocathode place microchannel plate be set, between photocathode, microchannel plate, anode and microchannel plate two ends be added with the identical voltage in direction; It is characterized in that, quartz crust inner chamber is electron multiplication chamber and glow discharge chamber by transmission-type cathode spacer; Photocathode, microchannel plate are positioned at electron multiplication chamber, and electron multiplication chamber is vacuum chamber; Anode is positioned at glow discharge chamber, and glow discharge chamber is low-pressure cavity, is filled with mercuryvapour and argon gas; The structure of described transmission-type negative electrode is, mosaic array micropore glass plate in the middle of circular aluminium flake starter negative electrode, and array micropore glass plate is coated with aluminium film towards the one end in electron multiplication chamber and gets over negative electrode, starter negative electrode with get over negative electrode short circuit; Microchannel plate comprises microchannel plate towards the voltage between one end and transmission-type negative electrode of transmission-type negative electrode and the voltage between transmission-type negative electrode and positive electrode towards the voltage between one end and anode of transmission-type negative electrode; Infrared laser is set in the outer end, electron multiplication chamber of quartz crust and triggers light source.
Its technique effect of the utility model is, the infrared light selecting existing optical communication generally to use is as triggering light, photocathode is irradiated in the outer end, electron multiplication chamber that infrared laser triggers the triggering light transmission quartz crust that light source sends, the photoelectron produced is after microchannel plate strengthens, penetrate transmission-type negative electrode, in the process arriving anode, encourage the mercury gas discharge in glow discharge chamber, under the retardance of argon gas, produce the ultraviolet of stable 253.7nm, after transmission quartz crust, emit to free space.
Control by modulation circuit the power supply that infrared laser triggers light source by primary signal, and then Tidal stress optical pulse frequency, the ultraviolet light of final radiation obtains identical modulation, realizes the transmitting of ultraviolet scatter communication signal.
Because the utility model belongs to glow discharge spot lamp, the electron transit ability of the length in optical output power and glow discharge chamber, diameter and transmission-type negative electrode is directly related, the utility model completely can according to the length, the diameter that need design glow discharge chamber of optical output power, in addition, photoelectron after the multiplication of microchannel plate, under high pressure, as 8200V, most can get over thickness and get over negative electrode less than 1 μm, therefore, ultraviolet light power output can reach a watt level completely.
Existing infrared optical fiber communication modulation bandwidth can reach very high frequency(VHF) magnitude, i.e. 30 ~ 300MHz, so, theory communication frequency response bandwidth of the present utility model should be 300MHz, communications speed then can reach 600Mbps, is far longer than the transmission rate of existing ultraviolet scatter communication technology 100Kbps.Further, the mains switch speed triggering light source due to infrared laser can reach more than 10GHz, and photocathode transformation time is only picosecond magnitude again, and the transit time of microchannel plate is also only magnitude of subnanosecond, therefore, can not cause signal transfer lag in these links; Although can multidiameter delay be there is in glow discharge chamber, cause time delay, Frequency Response can be corrected by shortening chamber, glow discharge chamber length and adjusting mercury vapor pressure completely.Therefore, practical communication transmission rate of the present utility model also can far away higher than prior art.
Accompanying drawing explanation
Accompanying drawing is the bicycle pump discharging lamp structure schematic diagram for ultraviolet scatter communication with photomultiplier transit transmissive cathode of the utility model, and this figure is simultaneously as Figure of abstract.
Embodiment
The utility model there is the bicycle pump discharge lamp of photomultiplier transit transmissive cathode as shown in drawings for ultraviolet scatter communication, in one end of quartz crust 1 inner chamber, photocathode 2 is set, the other end arranges anode 3, between photocathode 2 and anode 3, close on photocathode 2 place microchannel plate 4 be set, between photocathode 2, microchannel plate 4, anode 3 and microchannel plate 4 two ends be added with the identical voltage in direction.Quartz crust 1 inner chamber is electron multiplication chamber 5 and glow discharge chamber 6 by transmission-type cathode spacer.Photocathode 2, microchannel plate 4 are positioned at electron multiplication chamber 5, and electron multiplication chamber 5 is vacuum chamber.Anode 3 is positioned at glow discharge chamber 6, and glow discharge chamber 6 is low-pressure cavity, is filled with mercuryvapour and argon gas.The structure of described transmission-type negative electrode is, at circular aluminium flake starter negative electrode 7 middle mosaic array micropore glass plate 8, array micropore glass plate 8 is coated with aluminium film towards the one end in electron multiplication chamber 7 and gets over negative electrode 9, starter negative electrode 7 with get over negative electrode 9 short circuit.Microchannel plate 4 comprises microchannel plate 4 towards the voltage between one end and transmission-type negative electrode of transmission-type negative electrode and the voltage between transmission-type negative electrode and positive electrode 3 towards the voltage between one end and anode 3 of transmission-type negative electrode.Infrared laser is set in the outer end, electron multiplication chamber 5 of quartz crust 1 and triggers light source.
Described infrared laser triggers light source and is made up of infrared semiconductor laser 10 and extender lens 11, and triggering light is infrared light, if wavelength is the infrared light of 1310nm.
Described photocathode 2 is InGaAs photocathode.
Described microchannel plate 4 is the microchannel plate of band ion feedback preventing film, and aperture, microchannel is 50 μm, and microchannel spacing is 60 μm, and microchannel plate 4 thickness is 2.5mm, and microchannel draw ratio is 50, and microchannel plate 4 is coated with the thick SiO of 4nm towards the end face of photocathode 2
2insulating barrier.
In described transmission-type negative electrode, starter negative electrode 7 thickness is 5mm, and the side, electron multiplication chamber 5 of starter negative electrode 7 is coated with SiO
2insulating barrier; Array micropore glass plate 8 regular distribution through hole, duty ratio is less than or equal to 1, and through-hole aperture is 6 μm, and through-hole spacing is 8 μm, and array micropore glass plate 8 thickness is 0.3mm, and through hole draw ratio is 50; Getting over negative electrode 9 thickness is 0.4 μm.
Electron multiplication chamber 5 vacuum degree is 0.1Pa; Glow discharge chamber 6 is filled with mercury vapour with the air pressure of 0.8Pa, is filled with argon gas with the air pressure of 60Pa.
Voltage between photocathode 2 and microchannel plate 4 is 300V; The voltage at microchannel plate 4 two ends is 1000V; Microchannel plate 4 is 8200V towards the voltage between one end and transmission-type negative electrode of transmission-type negative electrode; Starting resistor between transmission-type negative electrode and positive electrode 3 is 1000V, and the voltage after starting between transmission-type negative electrode and positive electrode 3 is 180V.
Claims (6)
1. one kind has the bicycle pump discharge lamp of photomultiplier transit transmissive cathode for ultraviolet scatter communication, in one end of quartz crust inner chamber, photocathode is set, the other end arranges anode, between photocathode and anode, close on photocathode place microchannel plate be set, between photocathode, microchannel plate, anode and microchannel plate two ends be added with the identical voltage in direction; It is characterized in that, quartz crust inner chamber is electron multiplication chamber and glow discharge chamber by transmission-type cathode spacer; Photocathode, microchannel plate are positioned at electron multiplication chamber, and electron multiplication chamber is vacuum chamber; Anode is positioned at glow discharge chamber, and glow discharge chamber is low-pressure cavity, is filled with mercuryvapour and argon gas; The structure of described transmission-type negative electrode is, mosaic array micropore glass plate in the middle of circular aluminium flake starter negative electrode, and array micropore glass plate is coated with aluminium film towards the one end in electron multiplication chamber and gets over negative electrode, starter negative electrode with get over negative electrode short circuit; Microchannel plate comprises microchannel plate towards the voltage between one end and transmission-type negative electrode of transmission-type negative electrode and the voltage between transmission-type negative electrode and positive electrode towards the voltage between one end and anode of transmission-type negative electrode; Infrared laser is set in the outer end, electron multiplication chamber of quartz crust and triggers light source.
2. the bicycle pump discharge lamp for ultraviolet scatter communication with photomultiplier transit transmissive cathode according to claim 1, it is characterized in that, described infrared laser triggers light source and is made up of infrared semiconductor laser (10) and extender lens (11).
3. the bicycle pump discharge lamp for ultraviolet scatter communication with photomultiplier transit transmissive cathode according to claim 1, is characterized in that, described photocathode (2) is InGaAs photocathode.
4. the bicycle pump discharge lamp for ultraviolet scatter communication with photomultiplier transit transmissive cathode according to claim 1, is characterized in that, in described transmission-type negative electrode, electron multiplication chamber (5) side of starter negative electrode (7) is coated with SiO
2insulating barrier; Array micropore glass plate (8) regular distribution through hole, duty ratio is less than or equal to 1, and through hole draw ratio is 50; Getting over negative electrode (9) thickness is 0.4 μm.
5. the bicycle pump discharge lamp for ultraviolet scatter communication with photomultiplier transit transmissive cathode according to claim 1, is characterized in that, electron multiplication chamber (5) vacuum degree is 0.1Pa; Glow discharge chamber (6) is filled with mercury vapour with the air pressure of 0.8Pa, is filled with argon gas with the air pressure of 60Pa.
6. the bicycle pump discharge lamp for ultraviolet scatter communication with photomultiplier transit transmissive cathode according to claim 1, is characterized in that, the voltage between photocathode (2) and microchannel plate (4) is 300V; The voltage at microchannel plate (4) two ends is 1000V; Microchannel plate (4) is 8200V towards the voltage between one end and transmission-type negative electrode of transmission-type negative electrode; Starting resistor between transmission-type negative electrode and positive electrode (3) is 1000V, and the voltage after starting between transmission-type negative electrode and positive electrode (3) is 180V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520641181.6U CN204857656U (en) | 2015-08-24 | 2015-08-24 | A gas mercury discharge lamp that is used for ultraviolet scatter communication to have a photomultiplier transmission negative pole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520641181.6U CN204857656U (en) | 2015-08-24 | 2015-08-24 | A gas mercury discharge lamp that is used for ultraviolet scatter communication to have a photomultiplier transmission negative pole |
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| Publication Number | Publication Date |
|---|---|
| CN204857656U true CN204857656U (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520641181.6U Withdrawn - After Issue CN204857656U (en) | 2015-08-24 | 2015-08-24 | A gas mercury discharge lamp that is used for ultraviolet scatter communication to have a photomultiplier transmission negative pole |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047522A (en) * | 2015-08-24 | 2015-11-11 | 长春理工大学 | Gas mercury discharge lamp possessing photoelectric multiple transmission cathode used for ultraviolet scatter communication |
| CN106972343A (en) * | 2017-05-18 | 2017-07-21 | 长春理工大学 | Modulated electron beam pumping semiconductor-quantum-point white light Random Laser communication light source |
| CN110095785A (en) * | 2019-04-25 | 2019-08-06 | 长春理工大学 | From triggering strobed laser imaging device |
-
2015
- 2015-08-24 CN CN201520641181.6U patent/CN204857656U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047522A (en) * | 2015-08-24 | 2015-11-11 | 长春理工大学 | Gas mercury discharge lamp possessing photoelectric multiple transmission cathode used for ultraviolet scatter communication |
| CN106972343A (en) * | 2017-05-18 | 2017-07-21 | 长春理工大学 | Modulated electron beam pumping semiconductor-quantum-point white light Random Laser communication light source |
| CN110095785A (en) * | 2019-04-25 | 2019-08-06 | 长春理工大学 | From triggering strobed laser imaging device |
| CN110095785B (en) * | 2019-04-25 | 2020-08-21 | 长春理工大学 | Self-triggering gating laser imaging device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151209 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned |