CN108871573A - A kind of optical frequency measuring system based on formation of ultra-cold molecules photoassociation spectrum - Google Patents
A kind of optical frequency measuring system based on formation of ultra-cold molecules photoassociation spectrum Download PDFInfo
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- CN108871573A CN108871573A CN201810379622.8A CN201810379622A CN108871573A CN 108871573 A CN108871573 A CN 108871573A CN 201810379622 A CN201810379622 A CN 201810379622A CN 108871573 A CN108871573 A CN 108871573A
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- 230000010287 polarization Effects 0.000 claims description 15
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- 230000006872 improvement Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0291—Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements
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Abstract
It is disclosed by the invention to belong to optical frequency shift field of measuring technique,Specially a kind of optical frequency measuring system based on formation of ultra-cold molecules photoassociation spectrum,Including camera bellows,Closure door has been connected by hinge at the right openings of the camera bellows,Two sides are symmetrically arranged with two groups of corner cube retroreflectors up and down on the left of the inner cavity of the camera bellows,The corner cube retroreflector is fixed in camera bellows by buckling screw assembly,The left side of the camera bellows is fixedly connected with adjustable light beam generator by screw,The right side wall of the emission port face corner cube retroreflector of the adjustable light beam generator,Shutter is bonded with by bonding agent in the middle part of the emission port of the adjustable light beam generator,The middle part of the camera bellows has been symmetrically arranged photoswitch and lower photoswitch in two sides up and down,This programme passes through the improvement in structure,It can be improved the accuracy of original scheme,It operates more portable,Improve operating efficiency.
Description
Technical field
The present invention relates to optical frequency shift field of measuring technique, specially a kind of optical frequency shift based on formation of ultra-cold molecules photoassociation spectrum
Measuring device.
Background technique
Light wave is made of photon, and a photon carries energy and momentum just as a particle.The energy of one photon is
Planck's constant is multiplied by photon frequency E=hf.When lightwave source and observer have relative motion, the frequency of light wave observed will be sent out
Changing, i.e., so-called light wave frequency displacement (being called Doppler effect).The two moves towards, and frequency of light wave increases, and is blue shift, the two
It is located remotely from each other, frequency reduces, and cries red shift.
During preparing formation of ultra-cold molecules, optical frequency shift can be generated in photoassociation (Photoassociation, PA) spectrum
(optical frequency shift is as caused by the laser induced coupling between atomic scattering state and molecule bound state).By being carried out to optical frequency shift
Measurement, can highly precisely measuring S scattering of wave length, (this parameter is for understanding cold atoms and intermolecular collision characteristic
Or the dynamic behavior of condensed state is of crucial importance).However, existing optical frequency shift measuring technique exists since itself principle is limited
Following problem：First, in existing optical frequency shift measuring technique, it is necessary to can just observe light using the shape of p wave and d wave resonance
Frequency shift amount, and the shape of p wave and d wave resonance is difficult to generate, and thus causes optical frequency shift amount to be difficult to be observed, to lead
Cause the measurement difficulty of optical frequency shift big.Second, in existing optical frequency shift measuring technique, the quality of optical frequency shift amount and diatomic molecule it
Between inversely, since the quality of diatomic molecule is very big, so that optical frequency shift amount very little, it is difficult to be observed, thus equally
Cause the measurement difficulty of optical frequency shift big.Third, in existing optical frequency shift measuring technique, in order to guarantee the measurement accuracy of optical frequency shift,
It needs using high-precision F-P reference cavity, and high-precision F-P reference cavity needs additional high stable laser to realize frequency chain,
Thus cause the measurement cost of optical frequency shift high.
For status, there is the measure improved to the above technology, such as Chinese Patent Application No. is：
A kind of optical frequency measuring system and method based on formation of ultra-cold molecules photoassociation spectrum of CN201611009364.1, the present invention solve
The existing optical frequency shift measuring technique measurement problem that difficulty is big, measurement cost is high.Optical frequency based on formation of ultra-cold molecules photoassociation spectrum
Measuring system, including acousto-optic modulator, polarization beam splitter prism；First exit end and polarization beam splitter prism of acousto-optic modulator
First incidence end between be equipped be sequentially connected in series as the first photoswitch, the first half-wave plate made of the first optical path；Acousto-optic modulation
It is equipped between second exit end of device and second incidence end of polarization beam splitter prism and is filtered by the second photoswitch, neutral density
Second optical path made of piece, reflecting mirror, the second half-wave plate are sequentially connected in series；First optical path and the second optical path surround right angle trigonometry jointly
Shape.The present invention is suitable for optical frequency shift measurement, but in use, extraneous light is easy to impact the result of experiment,
Without safeguard structure, light is moved towards to need for adjusting, adjustment process is more troublesome, and is easy to appear light angle not
Accurate situation, it is not portable enough for the replacement of black glass when changing for light intensity, and position adjusts inconvenience,
For this purpose, we have proposed a kind of optical frequency measuring systems based on formation of ultra-cold molecules photoassociation spectrum.
Summary of the invention
The purpose of the present invention is to provide a kind of optical frequency measuring systems based on formation of ultra-cold molecules photoassociation spectrum, to solve
Extraneous light mentioned above in the background art is easy to impact the result of experiment, does not have safeguard structure, for light
Move towards need for adjusting, adjustment process is more troublesome, and the situation of light angle inaccuracy is easy to appear, for light intensity
It is not portable enough for the replacement of black glass when change, and position adjusts inconvenient problem.
To achieve the above object, the present invention provides the following technical solutions：A kind of light based on formation of ultra-cold molecules photoassociation spectrum
Frequency displacement measuring device, including camera bellows, closure door has been connected by hinge at the right openings of the camera bellows, and the inner cavity of the camera bellows is left
Two sides are symmetrically arranged with two groups of corner cube retroreflectors up and down for side, and the corner cube retroreflector is fixed on camera bellows by buckling screw assembly
Interior, the left side of the camera bellows is fixedly connected with adjustable light beam generator, the hair of the adjustable light beam generator by screw
The emission port middle part of the right side wall of loophole face corner cube retroreflector, the adjustable light beam generator is bonded with screening by bonding agent
Baffle, two sides have been symmetrically arranged photoswitch and lower photoswitch up and down at the middle part of the camera bellows, and the upper photoswitch is under
Photoswitch is fixed by snap on camera bellows inner wall, and the upper side wall of the camera bellows is connected with turntable, and the middle part of the turntable is horizontal
To shaft is equipped with, the both ends of the shaft are separately mounted to the two sides of camera bellows upper side wall, the edge of the turntable by bearing
Place has been uniformly embedded into black glass in circumferential direction, and two sides have been symmetrically arranged half-wave plate under up and down on the right side of the camera bellows
Half-wave plate, the upper half-wave plate and lower half-wave plate are fixed by snap on camera bellows inner wall, and the right side of the camera bellows is longitudinally set
It is equipped with polarization beam splitter prism and formation of ultra-cold molecules case, the polarization beam splitter prism is located at the left side of formation of ultra-cold molecules case, institute
State the right side that polarization beam splitter prism is located at upper half-wave plate and lower half-wave plate.
Preferably, the side of the corner cube retroreflector and the angle of horizontal plane are 45 °.
Preferably, the optical filtering performance of the black glass on the turntable increases in ladder clockwise.
Preferably, the transverse axis of the upper photoswitch, the transverse axis of upper half-wave plate and lower photoswitch, lower half-wave plate exists
On same straight line.
Preferably, the two sides up and down of the formation of ultra-cold molecules case are provided with storage unit room, the storage unit room
Left and right sidewall be symmetrically arranged with through-hole.
Preferably, the upper and lower sides of the closure door symmetrically offer two groups of logical wire casings.
Compared with prior art, the beneficial effects of the invention are as follows：This programme can be improved original by the improvement in structure
The accuracy of some schemes operates more portable, raising operating efficiency.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the side structure schematic view of turntable of the present invention.
In figure：1 camera bellows, 2 adjustable light beam generators, 3 shutters, 4 corner cube retroreflectors, photoswitch on 5,6 lower photoswitches,
7 turntables, 8 shafts, 9 black glass, half-wave plate, 11 lower half-wave plates, 12 polarization beam splitter prisms, the storage of 13 formation of ultra-cold molecules on 10
Box, 14 closure doors.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution referring to FIG. 1-2,：A kind of optical frequency shift based on formation of ultra-cold molecules photoassociation spectrum
Measuring device, including camera bellows 1, have been connected by hinge closure door 14 at the right openings of camera bellows 1, on the left of the inner cavity of camera bellows 1 up and down
Two sides are symmetrically arranged with two groups of corner cube retroreflectors 4, and corner cube retroreflector 4 is fixed in camera bellows 1 by buckling screw assembly, camera bellows 1
Left side adjustable light beam generator 2 is fixedly connected with by screw, the emission port face right angle of adjustable light beam generator 2 is anti-
The right side wall of light microscopic 4 is bonded with shutter 3 by bonding agent in the middle part of the emission port of adjustable light beam generator 2, in camera bellows 1
Two sides have been symmetrically arranged photoswitch 5 and lower photoswitch 6 up and down in portion, and upper photoswitch 5 and lower photoswitch 6 are solid by buckle
It being scheduled on 1 inner wall of camera bellows, the upper side wall of camera bellows 1 is connected with turntable 7, and the middle part of turntable 7 is horizontally installed with shaft 8, and the two of shaft 8
End is separately mounted to the two sides of 1 upper side wall of camera bellows by bearing, and the edge of turntable 7 has been uniformly embedded into black glass in circumferential direction
9, the right side of camera bellows 1 has been symmetrically arranged half-wave plate 10 and lower half-wave plate 11, upper half-wave plate 10 and lower half-wave in two sides up and down
Piece 11 is fixed by snap on 1 inner wall of camera bellows, and the right side of camera bellows 1 is vertically arranged with polarization beam splitter prism 12 and formation of ultra-cold molecules
Case 13, polarization beam splitter prism 12 are located at the left side of formation of ultra-cold molecules case 13, and polarization beam splitter prism 12 is located at upper half-wave plate
10 and lower half-wave plate 11 right side.
Wherein, the side of corner cube retroreflector 4 and the angle of horizontal plane are 45 °, the optical filtering of the black glass 9 on turntable 7
Performance increases in ladder clockwise, the cross of upper photoswitch 5, the transverse axis of upper half-wave plate 10 and lower photoswitch 6, lower half-wave plate 11
On the same line to axis, the two sides up and down of formation of ultra-cold molecules case 13 are provided with storage unit room, storage unit room
Left and right sidewall is symmetrically arranged with through-hole, and 14 upper and lower sides of sealing up a door symmetrically offer two groups of logical wire casings.
Working principle：Cold atoms are stored (such as in the storage unit room of about 13 two sides of formation of ultra-cold molecules case：It is super cold
Cs atom), adjustable light beam generator 2 issues parallel rays to the left, under the action of shutter 3, the parallel rays quilt at middle part
It blocks, upper and lower parallel rays is incident upon respectively on the corner cube retroreflector 4 of upper and lower two sides, in the reflex of corner cube retroreflector 4
Under, two groups of light are incident upon respectively on photoswitch 5 and lower photoswitch 6：(1) lower photoswitch 6 is opened, under the light of downside penetrates
Photoswitch 6, lower half-wave plate 11, polarization beam splitter prism 12 are injected into the storage unit room of 13 downside of formation of ultra-cold molecules case, are led to
The logical wire casing installation scanning device in closure door 14 is crossed, it includes one in the photoassociation spectrum that scanning, which obtains a photoassociation spectrum,
Formant scans to obtain a photoassociation spectrum, includes a formant in the photoassociation spectrum；(2) lower photoswitch 6 is closed, is opened
Photoswitch 5 is opened, another group of light passes through black glass 9, the upper half-wave plate 10, polarization beam splitting on upper photoswitch 5, turntable 7
Prism 12 is injected into the storage unit room of 13 downside of formation of ultra-cold molecules case, is set by the logical wire casing installation scanning in closure door 14
Standby, scanning obtains a photoassociation spectrum, photoswitch 5 in disconnection；Compare two formants in obtained photoassociation spectrum, by
This obtains the peak separation of two formants, which is the formant energy level spacing between two groups of light, the resonance
The value of peak energy grade spacing is the offset frequency amount a of preset adjustable light beam generator 2.Rotary turnplate 7 is so that on turntable 7
Black glass 9 is rotated around shaft 8, adjusts the black glass 9 to needs, and different black glass 9 can filter off
Different amounts of light repeats above-mentioned (1) (2) step, offset frequency amount b is obtained, when the difference of the two is the light intensity difference of two groups of light
The optical frequency shift amount of the formant of energy level.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of optical frequency measuring system based on formation of ultra-cold molecules photoassociation spectrum, including camera bellows (1), the right side of the camera bellows (1)
Closure door (14) have been connected by hinge at side opening, it is characterised in that：Two sides are symmetrically set up and down on the left of the inner cavity of the camera bellows (1)
Two groups of corner cube retroreflectors (4) are equipped with, the corner cube retroreflector (4) is fixed in camera bellows (1) by buckling screw assembly, described dark
The left side of case (1) is fixedly connected with adjustable light beam generator (2) by screw, the hair of the adjustable light beam generator (2)
The emission port middle part of the right side wall of loophole face corner cube retroreflector (4), the adjustable light beam generator (2) is viscous by bonding agent
It is connected to shutter (3), the middle part of the camera bellows (1) has been symmetrically arranged photoswitch (5) and lower photoswitch in two sides up and down
(6), the upper photoswitch (5) and lower photoswitch (6) are fixed by snap on camera bellows (1) inner wall, the camera bellows (1) it is upper
Side wall is connected with turntable (7), is horizontally installed with shaft (8) in the middle part of the turntable (7), and the both ends of the shaft (8) pass through axis
The two sides for being separately mounted to camera bellows (1) upper side wall are held, the edge of the turntable (7) has been uniformly embedded into black glass in circumferential direction
(9), the right side of the camera bellows (1) has been symmetrically arranged half-wave plate (10) and lower half-wave plate (11) in two sides up and down, it is described on
Half-wave plate (10) and lower half-wave plate (11) are fixed by snap on camera bellows (1) inner wall, and the right side of the camera bellows (1) is longitudinally set
It is equipped with polarization beam splitter prism (12) and formation of ultra-cold molecules case (13), the polarization beam splitter prism (12) is located at formation of ultra-cold molecules storage
The left side of box (13), the polarization beam splitter prism (12) are located at the right side of upper half-wave plate (10) and lower half-wave plate (11).
2. a kind of optical frequency measuring system based on formation of ultra-cold molecules photoassociation spectrum according to claim 1, feature exist
In：The side of the corner cube retroreflector (4) and the angle of horizontal plane are 45 °.
3. a kind of optical frequency measuring system based on formation of ultra-cold molecules photoassociation spectrum according to claim 1, feature exist
In：The optical filtering performance of black glass (9) on the turntable (7) increases in ladder clockwise.
4. a kind of optical frequency measuring system based on formation of ultra-cold molecules photoassociation spectrum according to claim 1, feature exist
In：The upper photoswitch (5), the transverse axis of upper half-wave plate (10) and lower photoswitch (6), lower half-wave plate (11) transverse axis
On the same line.
5. a kind of optical frequency measuring system based on formation of ultra-cold molecules photoassociation spectrum according to claim 1, feature exist
In：The two sides up and down of the formation of ultra-cold molecules case (13) are provided with storage unit room, the left and right sides of the storage unit room
Wall is symmetrically arranged with through-hole.
6. a kind of optical frequency measuring system based on formation of ultra-cold molecules photoassociation spectrum according to claim 1, feature exist
In：The upper and lower sides of the closure door (14) symmetrically offer two groups of logical wire casings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810379622.8A CN108871573B (en) | 2018-04-25 | 2018-04-25 | Optical frequency shift measuring device based on ultra-cold molecular light association spectrum |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810379622.8A CN108871573B (en) | 2018-04-25 | 2018-04-25 | Optical frequency shift measuring device based on ultra-cold molecular light association spectrum |
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| CN108871573B CN108871573B (en) | 2021-07-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013148757A1 (en) * | 2012-03-29 | 2013-10-03 | Imra America, Inc. | Methods for precision optical frequency synthesis and molecular detection |
| US20150362425A1 (en) * | 2014-02-14 | 2015-12-17 | Wisconsin Alumni Research Foundation | Single molecule spectroscopy using photothermal tuning of optical microcavities |
| CN106546332A (en) * | 2016-11-17 | 2017-03-29 | 山西大学 | Optical frequency measuring system and method based on formation of ultra-cold molecules photoassociation spectrum |
| US20170261586A1 (en) * | 2016-03-09 | 2017-09-14 | Siemens Healthcare Gmbh | Method and apparatus for acquiring magnetic resonance data |
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2018
- 2018-04-25 CN CN201810379622.8A patent/CN108871573B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013148757A1 (en) * | 2012-03-29 | 2013-10-03 | Imra America, Inc. | Methods for precision optical frequency synthesis and molecular detection |
| US20150362425A1 (en) * | 2014-02-14 | 2015-12-17 | Wisconsin Alumni Research Foundation | Single molecule spectroscopy using photothermal tuning of optical microcavities |
| US20170261586A1 (en) * | 2016-03-09 | 2017-09-14 | Siemens Healthcare Gmbh | Method and apparatus for acquiring magnetic resonance data |
| CN106546332A (en) * | 2016-11-17 | 2017-03-29 | 山西大学 | Optical frequency measuring system and method based on formation of ultra-cold molecules photoassociation spectrum |
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