GB2415287A - Recirculating Gas Laser - Google Patents
Recirculating Gas Laser Download PDFInfo
- Publication number
- GB2415287A GB2415287A GB0510264A GB0510264A GB2415287A GB 2415287 A GB2415287 A GB 2415287A GB 0510264 A GB0510264 A GB 0510264A GB 0510264 A GB0510264 A GB 0510264A GB 2415287 A GB2415287 A GB 2415287A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- heat exchanging
- fans
- discharge chamber
- recirculating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/041—Arrangements for thermal management for gas lasers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
A recirculating gas laser comprises a housing (1), a gas-dynamic contour (2), a gas-discharge chamber (7) and a system for feeding coolant to the heat exchanging fans. The gas-dynamic contour (2) comprises two heat exchanging gas supply channels (11,12) with a common gas-discharge chamber (7) having one anode (8) and two cathodes (9,10). Each heat exchanging gas supply channel (11,12) contains sequentially placed in a shell heat exchanging fans (3,4,5,6) having axes installed in parallel to the anode (8).
Description
24 1 5287
RECIRCULATING GAS LASER
-
The present invention relates to a recirculating gas laser. The laser has particular application in manufacturing processes.
A recirculating gas laser is known having a closed system of gas recirculation containing, positioned in a sealed housing, a fan for moving a working gas along a closed loop path, a system of electrodes for excitation of the gas by electric discharge, an optical resonator and a heat exchanger. See for example US-A-4099143. A problem with this laser is that it has a bulky heat exchanger installed in its housing, which increases the size and complicates construction of the laser.
There is also known a recirculating gas laser comprising a sealed housing having positioned therein a means for pumping and heat exchange of the gas executed in a form of a rotor with disks on a hollow shaft, a system for feeding coolant to a heat exchanger, electrodes for maintaining an exciting electric discharge in the gas, and an optical resonator for outputting the radiation. The number of heat exchanging rotors is equal to the number of electric discharge chambers. See for example USSR Inventor's Certificate No. 1718314. A problem with this laser is the low cooling degree of the working gas heated in the discharge chamber and, hence, low level of generated radiation and low efficiency of the laser.
According to the present invention, there is provided a recirculating gas laser comprising a housing, a gas- dynamic contour comprising two heat exchanging gas supply channels with a common gas-discharge chamber having one anode and two cathodes, each heat exchanging gas supply channel containing sequentially placed in a shell respective heat exchanging fans having axes installed in parallel to the anode, a respective one of the fans being arranged to blow gas into the gas-discharge chamber and the other fan being arranged to suck hot gas from the gas- discharge chamber, the gas-dynamic contour and electric motors of the heat exchanging fans being placed in a common vacuum volume.
The preferred embodiment increases the gas cooling degree and enhances the efficiency of the laser and the manufacturability thereof.
In one embodiment, a recirculating gas laser comprises a housing, a gasdynamic contour with heat exchanging fans executed in a form of rotors with disks on a hollow shaft, a gas-discharge chamber and a system for feeding coolant to the heat exchanging fans, and also resonators and electric motors of the heat exchanging fans. The gas-dynamic contour of the laser comprises two heat exchanging gas supply channels with a common gas-discharge chamber having one anode and two cathodes. Each heat exchanging gas supply channel contains sequentially placed in a shell heat exchanging fans having axes installed in parallel to the anode. One of the heat exchanging fans blows the gas in the gas-discharge chamber, and subsequent fans, namely a suction one and for example intermediate fans, are connected therebetween by a common gas channel. The gas- dynamic contour, resonators and electric motors of the heat exchanging fans are placed in a common vacuum volume.
The electric motors of the heat exchanging fans may have a forced cooling system.
The use of several heat exchanging gas supply channels with heat exchanging fans for cooling of a single (common) gas-discharge chamber provides effective operation of the laser due to a flow temperature decrease to the level that provides complete quenching of the excited levels of optically active molecules or atoms.
End seals are preferably installed on the hollow shaft for providing of feeding and tapping of the cooling fluid to rotor disks of the heat exchanging fans through the vacuum volume housing.
Embodiments of the present invention will now be described by way of example with reference to the accompanying drawings, in which: Fig. 1 shows an example of a recirculating gas laser according to an embodiment of the present invention; and, Fig. 2 is a side view of the same.
As shown in Fig. 1, a recirculating gas laser has a housing 1, a gasdynamic contour 2 with heat exchanging fans 3,4,5,6, made in the form of rotors with disks on a hollow shaft, and a gas-discharge chamber 7 having an anode 8 and cathodes 9,10. A system for feeding coolant to the heat exchanging fans is not shown in the drawings. The laser also has resonators and electric motors for heat exchanging fans with a cooling system (not shown in the drawings).
The gas-dynamic contour 2 of the laser comprises two heat exchanging gas supply channels 11,12 with a common gas-discharge chamber 7. Each of the gas supply channels 11,12 has two of the heat exchanging fans 3,4;5,6 having axes installed in parallel to the anode 8 and sequentially placed in shells 13,14. One of the heat exchanging fans 3,5 in each of the heat exchanging gas supply channels 11,12 is a fan blowing the gas in the gas-discharge chamber 7, and the other heat exchanging fan 4,6 sucks the gas out.
Several intermediate heat exchanging fans can be sequentially installed one after another between the respective sucking and blowing fans 3,4,5,6 for more effective lowering of the gas flow temperature in the gas supply channels 11,12.
The gas supply channels 11,12 form a common part of the channel in location of the gas-discharge chamber 7.
The suction heat exchanging fans 4,6 are not in direct communication with the gas-discharge chamber 7 and provide the main contribution for effective cooling of the gas flow. The gas-dynamic contours, resonators and electric motors are placed in a common vacuum housing 1. Electric motors of the heat exchanging fans 3,4,5,6 are provided with a water cooling system for operation in vacuum. End seals are installed on the hollow shafts of the heat exchanging fans 3,4,5,6 to prevent leakage of the cooling fluid to the vacuum volume. A window 15 is provided in the hermetic housing for outputting the laser radiation.
The recirculating gas laser operates as follows. The blowing heat exchanging fans 3,5 feed the cooled gas flow to the discharge chamber 7. An electric discharge is ignited between the cathodes 9,10 and the anode 8, exciting oscillating levels of the working intermixture active gas component. The induced radiation of the active component generates in the resonator a directional laser radiation which is outputted through the window 15. The suction heat exchanging fans 4,6 in each of the heat exchanging gas supply channels 11,12 suck the gas flow heated by the discharge, and cool it to a temperature corresponding to the most effective operating mode of the heat exchanging fans 4,6. Thus the gas temperature can remain above the temperature of complete deactivation of the gas flow oscillatory levels. For achieving the desired temperature, a multistage gas cooling by means of using intermediate heat exchanging fans can be provided. In this case the gas moves to the intermediate heat exchanging fans, providing stepped gas cooling to the temperature of complete deactivation of the gas intermixture, and then the gas is moved to the blowing heat exchanging fans 3,5 which blow the working gas intermixture to the discharge chamber.
A cooling fluid is fed through the coolant feeding system to rotating hollow shafts of the heat exchanging fans rotors, and end seals are used on the walls of the vacuum volume.
The given laser configuration is practically feasible, provides a high degree of gas flow cooling in the gas- dynamic contour and thus allows the efficiency of the laser to be raised.
Embodiments of the present invention have been described with particular reference to the example illustrated. However, it will be appreciated that variations and modifications may be made to the examples described within the scope of the present invention.
Claims (5)
1. A recirculating gas laser comprising a housing, a gas- dynamic contour comprising two heat exchanging gas supply channels with a common gas-discharge chamber having one anode and two cathodes, each heat exchanging gas supply channel containing sequentially placed in a shell respective heat exchanging fans having axes installed in parallel to the anode, a respective one of the fans being arranged to blow gas into the gas-discharge chamber and the other fan being arranged to suck hot gas from the gas- discharge chamber, the gas-dynamic contour and electric motors of the heat exchanging fans being placed in a common vacuum volume.
2. A recirculating gas laser according to claim 1, wherein each heat exchanging gas supply channel comprises intermediate heat exchanging fans arranged to lower the gas flow temperature in a stepwise manner, said intermediate heat exchanging fans being installed between the respective suction and blowing heat exchanging fans.
3. A recirculating gas laser according to claim 1 or claim 2, wherein the heat exchanging fans are formed as rotors mounted on a shaft.
4. A recirculating gas laser according to any of claims 1 to 3, comprising means for supplying coolant to the heat exchanging fans.
5. A recirculating gas laser substantially in accordance with any of the examples as hereinbefore described with reference to and as illustrated by the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2004115440/28A RU2270499C2 (en) | 2004-05-21 | 2004-05-21 | Flowing gas laser |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0510264D0 GB0510264D0 (en) | 2005-06-29 |
| GB2415287A true GB2415287A (en) | 2005-12-21 |
| GB2415287B GB2415287B (en) | 2008-05-07 |
Family
ID=34836929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0510264A Expired - Fee Related GB2415287B (en) | 2004-05-21 | 2005-05-19 | Recirculating gas laser |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE102005023470B4 (en) |
| FR (1) | FR2870649B1 (en) |
| GB (1) | GB2415287B (en) |
| RU (1) | RU2270499C2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969645B (en) * | 2012-11-21 | 2015-07-15 | 中国科学院光电研究院 | Flow guide device for dual-electrode discharge cavity, discharge cavity employing same, and excimer laser |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2229314A (en) * | 1989-03-15 | 1990-09-19 | Atomic Energy Authority Uk | High pressure gas laser |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1718314A1 (en) * | 1981-03-11 | 1992-03-07 | Институт Теоретической И Прикладной Механики Со Ан Ссср | Flowing gas laser |
| DE3245958A1 (en) * | 1982-12-11 | 1984-06-14 | Battelle-Institut E.V., 6000 Frankfurt | LASER ARRANGEMENT |
| US4635269A (en) * | 1985-02-08 | 1987-01-06 | Laser Corporation Of America | Flowing gas laser having screening for smoothing low turbulence flow |
| JPH0232579A (en) * | 1988-07-22 | 1990-02-02 | Fanuc Ltd | Laser oscillating device |
| WO1991007789A1 (en) * | 1989-11-15 | 1991-05-30 | Institut Teoreticheskoi I Prikladnoi Mekhaniki Sibirskogo Otdelenia Akademii Nauk Sssr | Flow-type gas laser |
| JPH07227688A (en) * | 1994-02-22 | 1995-08-29 | Daihen Corp | Gas laser beam machine |
-
2004
- 2004-05-21 RU RU2004115440/28A patent/RU2270499C2/en not_active IP Right Cessation
-
2005
- 2005-05-19 GB GB0510264A patent/GB2415287B/en not_active Expired - Fee Related
- 2005-05-20 DE DE200510023470 patent/DE102005023470B4/en not_active Expired - Fee Related
- 2005-05-23 FR FR0505155A patent/FR2870649B1/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2229314A (en) * | 1989-03-15 | 1990-09-19 | Atomic Energy Authority Uk | High pressure gas laser |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2870649A1 (en) | 2005-11-25 |
| DE102005023470A1 (en) | 2006-02-09 |
| RU2270499C2 (en) | 2006-02-20 |
| GB2415287B (en) | 2008-05-07 |
| FR2870649B1 (en) | 2007-02-09 |
| GB0510264D0 (en) | 2005-06-29 |
| RU2004115440A (en) | 2005-11-10 |
| DE102005023470B4 (en) | 2009-01-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20091112 AND 20091118 |
|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20110519 |