CN2506002Y - Two-dimension force applying mode zecman double reflection bifrequency laser - Google Patents
Two-dimension force applying mode zecman double reflection bifrequency laser Download PDFInfo
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- CN2506002Y CN2506002Y CN 01268038 CN01268038U CN2506002Y CN 2506002 Y CN2506002 Y CN 2506002Y CN 01268038 CN01268038 CN 01268038 CN 01268038 U CN01268038 U CN 01268038U CN 2506002 Y CN2506002 Y CN 2506002Y
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- laser
- exerting
- ring
- photoelastic
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Abstract
A two-dimension force applying mode zeeman double reflection bifrequency laser relates to a structure design of helium neon zeeman double reflection bifrequency laser device, which comprises an He-Ne laser gain pipe, a photo-elastic element of a laser resonance cavity, an exerting device, a reflection lens, a quartz sealing shell and a magnetic strip for external cross magnetic field. The utility model is characterized in that the exerting device adopts a two-dimensional exerting loop with an exerting bolt, namely the exerting loop of roundness, square or other shapes which can exert a pair of orthometric diameter direction on the photo-elastic element. The utility model reduces the problem of the frequency difference drifting of the laser and improves the reliability of the device; therefore, the laser gets into the practice applied stage.
Description
Technical field
The utility model relates to a kind of laser, particularly a kind of structural design of He-Ne Zeeman-birefringence double-frequency laser of two-dimentional force mechanism.
Background technology
At present a kind of " birefringence double-frequency laser and the frequency difference accuracy control method thereof that do not have the frequency difference locking " that proposes in the prior art (Chinese patent: application number: 99103513.5), this two-frequency laser by laser gain pipe, one dimension force application apparatus, add transverse magnetic field and form.This technology has solved two-frequency laser and can not export greater than the problem of 3 megahertzes less than the difference on the frequency of 40 megahertzes, thereby has broken through the restriction of existing two-frequency laser interferometer on measuring speed, on the utility model history of two-frequency laser significance is arranged.Be fit to the suitable frequency difference that two-frequency laser interferometer is used though this kind laser can be exported, its frequency difference stability can't reach the specific requirement of commercial Application.The difference on the frequency of Zeeman-birefringence double-frequency laser still has drift phenomenon, its reason mainly contains following two aspects: the one, when changing because of ambient temperature, (half inner chamber is anti-reflection window for afterburning ring and photoelastic components, full inner chamber is the output window) all can expand with heat and contract with cold, if but different, the coefficient of linear expansion difference of material of afterburning ring and photoelastic components, the size of heat expansion and shrinkage is also different.As augmentor is that (linear expansion coefficient is about 5 * 10 to invar
-7), window materials are that (linear expansion coefficient is about 4 * 10 to K9 glass
-6), the diameter of window fast than the diameter expansion of invar during intensification, afterburning ring strengthens the pressure of window, causes that the internal stress of window becomes big, and birefringence effect is strengthened, and it is big that difference on the frequency becomes, and vice versa.The variable quantity of Yin Ruing is at several MHz thus.It two is that the force application apparatus to photoelastic components is the afterburning mode of one dimension in existing Zeeman-birefringence double-frequency laser, because the frequency difference of this kind laser is directly proportional with the stress of generation in the photoelastic components, so when need producing less frequency difference institute to add stress also less, this makes the relative photoelastic components of augmentor loosening easily, poor reliability.
Summary of the invention
The purpose of this utility model is on the basis of above-mentioned patented technology, a kind of Zeeman birefringence double-frequency laser of two-dimentional force mechanism is provided, to overcome existing Zeeman birefringence double-frequency laser difference on the frequency drifting problem, improve the reliability of device, but make this laser enter practical stage.
The purpose of this utility model is achieved through the following technical solutions: a kind of Zeeman-birefringence double-frequency laser of ring of two-dimentional force mechanism, comprise a He-Ne laser gain pipe, and laserresonator in photoelastic components (half inner chamber is anti-reflection window, full inner chamber is the output window) and force application apparatus, mirror lens, the quartz packaged shell adds the used magnetic stripe of transverse magnetic field, and described force application apparatus is for having the two-dimensional force-adding ring of afterburning screw on it.
Described two-dimensional force-adding ring can be garden shape, the square reinforcing ring that maybe can apply other shapes of a pair of mutually orthogonal diametric(al) diameter reinforcing to photoelastic components.
Loosening easily for preventing the relative photoelastic components of augmentor, the further reliability of generator, but afterburning ring and on afterburning screw can adopt reinforcing ring and the afterburning screw made from the corresponding to valve of the coefficient of linear expansion of photoelastic components thereof.
The utility model is owing to replace original one dimension force application apparatus with two-dimentional force application apparatus, and the structure of reinforcing ring and material therefor thereof carried out optimizing chosen, thereby further reduced the difference on the frequency drift of this kind laser, and improved the reliability of this device, but make this laser enter the stage of practical application.
Description of drawings:
Fig. 1 is the structural representation of the Zeeman birefringence double-frequency laser of two-dimentional afterburning mode.
Structural representation when Fig. 2 is circular for augmentor
Fig. 3 is the structural representation when square for augmentor adopts.
Fig. 4 is afterburning ring mounting structure generalized section.
Embodiment
Describe principle of the present utility model, structure in detail, specifically implement and optimal way below in conjunction with accompanying drawing:
Zeeman-the birefringence double-frequency laser of the ring of two dimension force mechanism, comprise a He-Ne laser gain pipe 11, and photoelastic components 9 and force application apparatus thereof in the laserresonator, mirror lens 16, quartz packaged shell 12, add the used magnetic stripe of transverse magnetic field 14,15, described force application apparatus is for having the two-dimensional force-adding ring of afterburning screw on it.Be that force application apparatus is two-dimentional force application apparatus, promptly on a pair of mutually orthogonal diametric(al) of photoelastic components perpendicular to the reinforcing of light beam diameter, we claim that this force application apparatus is a two-dimensional force-adding ring, can adopt circular 7 (as shown in Figure 2) or square 10 (as shown in Figure 3) and other can apply the reinforcing ring of other shapes of a pair of mutually orthogonal diametric(al) diameter reinforcing to photoelastic components.In two orthogonal diametrical position of circular afterburning ring and in the center of the four edges of square afterburning ring four screws are arranged respectively, each screw is furnished with one piece of tack jackscrew 8 to the photoelastic components reinforcing that is positioned at ring.When laser beam passed through this photoelastic components, the frequency difference that laser produced was directly proportional with orthogonal two stress differences that add force direction, and it can be expressed as,
Δ v is a laser output frequency difference in the formula, Δ n
1, Δ n
2Be two principal directions of stress principal refractive index, n
0Be the refractive index of photoelastic components, P
12, P
11Be strain optical coefficient tensor, S
1, S
2Be the principal strain tensor.This novel two-dimentional force application apparatus obtains little frequency difference by little stress difference is provided, and this makes us can apply enough big power when obtaining little frequency difference, and is loosening to prevent afterburning ring, guarantees reliability.
Embodiment:
The two dimension augmentor is that example is illustrated to adopt circle (as shown in Figure 2) or square (as shown in Figure 3).Afterburning ring 7 is fastened on the photoelastic components (on the output window 13 of full intracavity laser, or on the anti-reflection window 9 of half-intracavity laser) by four afterburning screws 8 (tack jackscrew) mounted thereto, and by the degree of tightness of reconciling jackscrew obtain need frequency difference.With epoxy resin jackscrew and window, jackscrew and afterburning ring are cemented respectively then, so just can guarantee its reliability.But afterburning ring all is the coefficient of linear expansion valve consistent with the coefficient of linear expansion of photoelastic components with the material of jackscrew.This metal and photoelastic components material k4 satisfy the relation of matched seal between the glass, can guarantee the consistency that they expand and shrink.Augmentor structure after cementing as shown in Figure 4, wherein 11 is laser gain pipe.
Claims (3)
1. Zeeman-the birefringence double-frequency laser of a two-dimentional force mechanism, comprise a He-Ne laser gain pipe, and photoelastic components and force application apparatus thereof in the laserresonator, mirror lens, the quartz packaged shell, add the used magnetic stripe of transverse magnetic field, it is characterized in that described augmentor is for having the two-dimensional force-adding ring of afterburning screw on it.
2. according to the described a kind of Zeeman-birefringence double-frequency laser of claim 1, it is characterized in that described two-dimensional force-adding ring is garden shape, the square reinforcing ring that maybe can apply other shapes of a pair of mutually orthogonal diametric(al) diameter reinforcing to photoelastic components.
3. according to the Zeeman-birefringence double-frequency laser of claim 1 or 2 described two-dimentional force mechanisms, but it is characterized in that described afterburning ring and on afterburning screw be by reinforcing ring and the afterburning screw thereof made with the corresponding to valve of the coefficient of linear expansion of photoelastic components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01268038 CN2506002Y (en) | 2001-10-31 | 2001-10-31 | Two-dimension force applying mode zecman double reflection bifrequency laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01268038 CN2506002Y (en) | 2001-10-31 | 2001-10-31 | Two-dimension force applying mode zecman double reflection bifrequency laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2506002Y true CN2506002Y (en) | 2002-08-14 |
Family
ID=33674300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01268038 Expired - Fee Related CN2506002Y (en) | 2001-10-31 | 2001-10-31 | Two-dimension force applying mode zecman double reflection bifrequency laser |
Country Status (1)
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|---|---|
| CN (1) | CN2506002Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386930C (en) * | 2005-03-04 | 2008-05-07 | 清华大学 | HeNe laser device capable of outputting two beams of vertically polarized light with stabilized intensity |
| CN1773789B (en) * | 2005-11-04 | 2010-05-05 | 清华大学 | Elastic stressing stress birefringence double-frequency laser |
| TWI620383B (en) * | 2016-10-11 | 2018-04-01 | Yung Fu Chen | Double polarization mode-locked laser system, gain module thereof and control method thereof |
-
2001
- 2001-10-31 CN CN 01268038 patent/CN2506002Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386930C (en) * | 2005-03-04 | 2008-05-07 | 清华大学 | HeNe laser device capable of outputting two beams of vertically polarized light with stabilized intensity |
| CN1773789B (en) * | 2005-11-04 | 2010-05-05 | 清华大学 | Elastic stressing stress birefringence double-frequency laser |
| TWI620383B (en) * | 2016-10-11 | 2018-04-01 | Yung Fu Chen | Double polarization mode-locked laser system, gain module thereof and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020814 Termination date: 20101031 |