CN1189624A - Regulation method and device of variable channel super-narrow line width atomic light filter - Google Patents
Regulation method and device of variable channel super-narrow line width atomic light filter Download PDFInfo
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- CN1189624A CN1189624A CN97109021A CN97109021A CN1189624A CN 1189624 A CN1189624 A CN 1189624A CN 97109021 A CN97109021 A CN 97109021A CN 97109021 A CN97109021 A CN 97109021A CN 1189624 A CN1189624 A CN 1189624A
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Abstract
A regulation method for atomic optical filter with variable channel and ultranarrow line width includes heating sample bubble to 40-60 deg.C for Cs atom, starting optical pumping laser devce to output stable laser beam, regulating the work temp of semiconductor laser device to make output wavelength on fine resonance line of atom, and regulating and locking work current to the current reading corresponding to one of two superfine spectrum lines. The semiconductor laser diodor is fixed to casing of the filter. The optical reflector and transmission-reflection mirror is connected to casing of filter. It can be used for civil communication with high sensitivity of receiving system.
Description
The present invention relates to a kind of method of adjustment and device of variable channel super-narrow line width atomic light filter, be applicable to optical-fibre communications and free space laser communications, satellite and satellite, airship and ground, satellite and submarine, laser radar and other various laser remote sensings or telemetry system.
At present, the best filter system of filter effect is an atomic light filter in the world, they mainly comprise: resonance fluorescence, field ionization (FI) and faraday rotate three types, their characteristics are can only obtain single communication channel in big wavelength coverage and have the live width of comparing higher working temperature broad with the present invention, main existing problems are: 1, in the laser communications of open channel, if use laser to carry out work with a kind of frequency, the strong scattering light of transmitting terminal can be injected receiving system, it will flood faint received signal in two-way free space laser communications, make the speed of communication be restricted; 2, owing to have only the atomic density of some, system must operate at certain temperature, and temperature is higher, thereby has influenced the serviceable life of system.
The method of adjustment and the device that the purpose of this invention is to provide a kind of variable channel super-narrow line width atomic light filter, atom on the sub-energy level is pumped on another sub-energy level, make emission and be received in two different channels, transmitting-receiving can be carried out simultaneously, improved the atomic density on communication speed and the energy level, reduced temperature in the system works, thereby made system's long service life.
In order to realize above-mentioned purpose, the present invention is by the following technical solutions: it is by laser instrument, the pumping laser beam, catoptron, Glan prism, saturating anti-mirror, thermofin, warmer, the glass sample bubble, optical window, permanent magnet constitutes, with laser instrument as the pumping LASER Light Source, its emitted laser bundle leads or leads with optical fiber with optical mirror and saturating anti-mirror, direction against signal laser, irradiation work atom, adjustment work skin is long, make it aim in two hyperfine spectral lines one respectively, obtain different two the narrower communication channels of live width of frequency, the central task wavelength of this pumping laser must be away from the operation wavelength of signal laser, caesium atom-Cs light filter, the operation wavelength that can select pumping laser for use is 852nm, the operation wavelength of signal laser is 894nm, the bandwidth of the central task wavelength of pumping laser must be less than the width of two hyperfine structures, caesium atom-Cs light filter, and bandwidth must be less than 9GHz.
Fig. 1 is the structural representation of the super narrow line atomic light filter of changeable channel.
Fig. 2 is the communication channel synoptic diagram of conventional atomic light filter.
Fig. 3 is one of variable channel super-narrow line width atomic light filter news road synoptic diagram.
Fig. 4 is two synoptic diagram in variable channel super-narrow line width atomic light filter news road.
With reference to the accompanying drawings the present invention is described in further detail below:
According to Fig. 1 as can be known; this device is made up of following parts; the dress operation material; the glass sample of caesium atom-Cs bubble 9 is on the signal optical axis innermost layer at light filter; what be close to that glass sample bubble 9 lays is temperature detector and warmer 8; thermofin 7 is between warmer 8 and the permanent magnet 11; play the effect of insulation and partial fixing temperature detector and warmer 8 and glass envelope sample bubble 9; the optical window 10 of insulation usefulness is made with planar optics glass; play the outer hot air acting of protection bubble; permanent magnet 11 is in magnetic field that the outermost layer of light filter is used for light filter work; two Glan prisms 4; being in as much as possible during 5 work, quadrature has played partially and analyzing or filter action; Glan prism 5 is contained in the place ahead of light filter, and Glan prism 4 is contained in the rear of light filter promptly near photo-detector.On the nonmagnetic atom optical filter, connect optically pumped laser 1, optical mirror 3 and saturating anti-mirror 6.Optical pumping laser beam 2 is passed through in radome 13,14 the insides.Radome 13,14 is fixed on the support of the shell 12 of light filter and completely reflecting mirror 3.Optically pumped laser 1 is made up of semiconductor laser diode and the corresponding dress system of waiing upon.In waiing upon dress system, show that electric current and temperature with four and half digital watch, can not arbitrarily change in case demarcate, as need change must be in advance accurate standard.The semiconductor laser diode of optically pumped laser 1 is fixed on the atom magneto-optic filter shell 12, also can be placed in other suitable space, specific requirement reply communication system is taken all factors into consideration, and optical pumping laser beam 2 can be entered in the glass sample bubble 9 with best path and mode shine the work atom to greatest extent, optical total-reflection mirror 3 is fixed on the shell 12 of laser instrument or on other, and concrete fixing means is taken all factors into consideration by the exchange of communication system.Optical total-reflection mirror 3 plays the effect of direct light pumping laser beam 2, and it must make the saturating anti-mirror 6 of pumping light beams directive before Glan prism 4.The shell 12 of saturating anti-mirror 6 and light filter joins or other space easily, before saturating anti-mirror 6 is contained in Glan prism 4, the quadrature that guarantees Glan prism 4,5 is not destroyed, saturating anti-mirror 6 becomes 40-50 degree angle (45 degree are for best) to shine the work atom as far as possible to guarantee pumping laser with the optical axis of light filter, 6 pairs of pumping laser of saturating anti-mirror are all-trans, to the flashlight full impregnated.This light filter is adjusted by the following method: at first add temperature, temperature is 40-60 degree centigrade, the sample bubble is heated to certain temperature, can arrive 40-60 degree centigrade for the caesium atom, making has enough work atomicity density in the glass sample bubble 9, and different sample work atoms have different temperature ranges; Next starts optically pumped laser 1, optically pumped laser 1 preheating is 25-35 minute, to obtain 2 outputs of stable laser beam, laser beam 2 is injected anti-mirror 6 through completely reflecting mirror 3, reflex on the work atom in the glass sample bubble by saturating anti-mirror 6 then, penetrate through another heat insulation window and Glan prism 5 at last; Be working temperature and the working current of adjusting semiconductor laser once more, its output wavelength is operated on the meticulous resonance line of atom.The operation wavelength of caesium atom-Cs magneto-optic light filter pumping laser is 852nm, the working temperature of optically pumped laser 1 should not be changed after setting up, meticulous adjustment work is finished by the adjustment of electric current, near the working current of scanning optically pumped laser operation wavelength 852nm, before Glan prism 5, place in another receiving system two absorption lines that similar photo-detector can obtain the hyperfine structure of 852nm, note pairing working current of each bar spectral line and working temperature thereof, in order in communication work, using; The 4th transfers to working current and be locked in a certain pairing current indication in two hyperfine spectral lines, this moment, the light transmission passage of this frequency was closed, pent passage can be used for the transmission channel of free space laser communications, another communication channel that also can be used for optical-fibre communications, the work skin of the signal laser that sweep test is used under this state is long, sweep limit is 20CHz near 894nm, can obtain Fig. 3 or communication channel figure shown in Figure 4, Fig. 3 is one of variable channel super-narrow line width atomic light filter news road, in its corresponding two hyperfine spectral line one, Fig. 4 is two of variable channel super-narrow line width atomic light filter news road, in two hyperfine spectral lines another.If close optically pumped laser 1 then obtain the road news passage figure of conventional atomic light filter shown in Figure 2, Fig. 2 be that the news road of conventional atomic light filter is composed.The longitudinal axis of Fig. 2, Fig. 3, Fig. 4 is represented the transmitance (% of unit) of light filter; Transverse axis is represented the frequency range (unit: GHz) that scans.The signal of signal laser is received and is converted to electric signal and gives computer drawing and go out by Photodetection system.
The present invention compared with prior art has the following advantages and effect: 1, simple in structure, and method of adjustment Feasible; 2, can control two narrower communication channels of live width, radiative frequency and reception light frequency branch Open, avoided radiative strong scattering to the impact of receiving system, improved the sensitivity of receiving system, make Communication distance or detection range increase, and can carry out simultaneously the laser communications of two-way free space, have shortened logical The news time; 3, in optical-fibre communications, can be respectively as two communication channels, thereby make optical-fibre communications Capacity doubles; 4, can be used for the laser communications of different wave length for same filter, can make With same pumping laser, as long as both work skins are long different, for example: caesium atom-Cs filter The operation wavelength 852nm of pumping laser, operation wavelength can be 894nm, also can be 45 5nm or 459nm, if operation wavelength 852nm, then the operation wavelength of pumping laser should Be changed to 894nm; 5, reduce optical noise, improved detectivity, the transmitance height of filter, Filter can be operated in lower temperature, thereby has improved the service life of filter. Be suitable for national defense construction With civilian communication, has certain economic benefit.
Claims (3)
1, a kind of method of adjustment of variable channel super-narrow line width atomic light filter and device is characterized in that:
A, heat, the sample bubble is heated, the caesium atom is reached 40-60 ° of degree;
B, startup optically pumped laser (1), optically pumped laser (1) preheating is 25-35 minute, to obtain stable laser beam (2) output;
The working temperature and the working current of C, adjustment semiconductor laser are operated on the meticulous resonance line of atom output wavelength;
D, working current transferred to and is locked in a pairing current indication in two hyperfine spectral lines.
2, a kind of method of adjustment and device that uses the variable channel super-narrow line width atomic light filter of claim 1, the semiconductor laser diode that it is characterized in that optically pumped laser (1) is fixed on the shell (12) of light filter, optical total-reflection mirror (3) joins with the shell (12) of light filter, saturating anti-mirror (6) links to each other with the shell (12) of light filter, and it is preceding that saturating anti-mirror (6) is contained in Glan prism (4).
3, the method for adjustment of a kind of variable channel super-narrow line width atomic light filter according to claim 2 and device is characterized in that anti-mirror (6) becomes the 40-50 degree with the optical axis of light filter, are the best with 45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97109021 CN1082671C (en) | 1997-01-29 | 1997-01-29 | Regulation method and device of variable channel super-narrow line width atomic light filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97109021 CN1082671C (en) | 1997-01-29 | 1997-01-29 | Regulation method and device of variable channel super-narrow line width atomic light filter |
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| Publication Number | Publication Date |
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| CN1189624A true CN1189624A (en) | 1998-08-05 |
| CN1082671C CN1082671C (en) | 2002-04-10 |
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| CN 97109021 Expired - Fee Related CN1082671C (en) | 1997-01-29 | 1997-01-29 | Regulation method and device of variable channel super-narrow line width atomic light filter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458319B (en) * | 2008-12-22 | 2011-12-21 | 中国航天科技集团公司第五研究院第五一○研究所 | Method for optimizing optical parameter of cesium-beam frequency scale median bundle |
| CN104297950A (en) * | 2014-10-23 | 2015-01-21 | 浙江大学城市学院 | Mixed gas multi-waveband atomic optical filter and method thereof |
| CN106200022A (en) * | 2016-07-27 | 2016-12-07 | 中国科学院武汉物理与数学研究所 | A kind of optical fiber atom filter device |
-
1997
- 1997-01-29 CN CN 97109021 patent/CN1082671C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458319B (en) * | 2008-12-22 | 2011-12-21 | 中国航天科技集团公司第五研究院第五一○研究所 | Method for optimizing optical parameter of cesium-beam frequency scale median bundle |
| CN104297950A (en) * | 2014-10-23 | 2015-01-21 | 浙江大学城市学院 | Mixed gas multi-waveband atomic optical filter and method thereof |
| CN104297950B (en) * | 2014-10-23 | 2017-02-01 | 浙江大学城市学院 | Mixed gas multi-waveband atomic optical filter and method thereof |
| CN106200022A (en) * | 2016-07-27 | 2016-12-07 | 中国科学院武汉物理与数学研究所 | A kind of optical fiber atom filter device |
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| Publication number | Publication date |
|---|---|
| CN1082671C (en) | 2002-04-10 |
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