GB1150463A - Improvements in or relating to Gas Lasers - Google Patents
Improvements in or relating to Gas LasersInfo
- Publication number
- GB1150463A GB1150463A GB43725/66A GB4372566A GB1150463A GB 1150463 A GB1150463 A GB 1150463A GB 43725/66 A GB43725/66 A GB 43725/66A GB 4372566 A GB4372566 A GB 4372566A GB 1150463 A GB1150463 A GB 1150463A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbon dioxide
- mirrors
- vibrational
- discharge
- tube
- 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.)
- Expired
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
- H01S3/03—Constructional details of gas laser discharge tubes
- H01S3/036—Means for obtaining or maintaining the desired gas pressure within the tube, e.g. by gettering, replenishing; Means for circulating the gas, e.g. for equalising the pressure within the tube
-
- 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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/22—Gases
- H01S3/223—Gases the active gas being polyatomic, i.e. containing two or more atoms
- H01S3/2232—Carbon dioxide (CO2) or monoxide [CO]
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Lasers (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
1,150,463. Gas lasers. WESTERN ELECTRIC CO., Inc. 30 Sept., 1966 [14 Oct., 1965] No. 43725/66. Heading H1C. A gas laser includes as the active medium a mixture of nitrogen, helium and either carbon dioxide or nitrous oxide. The mixed gases are continuously pumped into a tube 20, at least two inches in diameter. A D.C. discharge is set up between oxide coated platinum cathodes 14, containing barium and strontium carbonates, and anode 15. A coolant such as water or methanol is passed through outer tube 21 to increase the difference between the rotational and vibrational temperatures of the carbon dioxide. A resonator, consisting of mirrors 33, 34, the former having an aperture through which the output is obtained, may be provided or, if a straight-through amplifier is required, may be omitted. Alternatively, additional mirrors may be provided to form a ring laser, or the two mirrors may be adjusted to define non-overlapping paths for a multi-pass amplifier. The mirrors may be outside the tube 20 if Brewster windows are provided. Tube 20 may be of glass, plastic or quartz and is about three meters long. The laser output may be detected by a calibrated thermopile or may be passed through an electro-optic modulator. The gas pressures should lie in the ranges, CO 2 :N 2 :He, 0À2 to 0À4: 1À0 to 1À5: 3À0 to 10À0 Torr. Pumping may be provided by a radio frequency discharge instead of a D.C. discharge. Theory.-The helium atoms are ionized by the D.C. discharge and decay quickly to the 19À8 ev metastable state. The metastable helium atoms are each capable of dissociating two nitrogen molecules to give 9À9 ev nitrogen atoms. These atoms decay through higher vibrational levels and then through four more equally spaced vibrational energy levels to the ground state. The energy produced in each of these latter transitions is equal to that required to excite the 00‹1 vibrational level of the carbon dioxide molecules. Stimulated emission then occurs between this level and the 10‹0 level. Nitrous oxide has energy levels similarly spaced to these energy levels of carbon dioxide.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US49584465A | 1965-10-14 | 1965-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1150463A true GB1150463A (en) | 1969-04-30 |
Family
ID=23970204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB43725/66A Expired GB1150463A (en) | 1965-10-14 | 1966-09-30 | Improvements in or relating to Gas Lasers |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE684973A (en) |
| DE (1) | DE1589070C3 (en) |
| FR (1) | FR1487672A (en) |
| GB (1) | GB1150463A (en) |
| NL (1) | NL140112B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071202A (en) * | 2015-08-14 | 2015-11-18 | 中国科学院光电研究院 | Integrated gas laser |
-
1966
- 1966-07-25 FR FR70666A patent/FR1487672A/en not_active Expired
- 1966-08-02 BE BE684973D patent/BE684973A/xx not_active IP Right Cessation
- 1966-09-28 NL NL666613688A patent/NL140112B/en not_active IP Right Cessation
- 1966-09-30 GB GB43725/66A patent/GB1150463A/en not_active Expired
- 1966-10-12 DE DE1589070A patent/DE1589070C3/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071202A (en) * | 2015-08-14 | 2015-11-18 | 中国科学院光电研究院 | Integrated gas laser |
| CN105071202B (en) * | 2015-08-14 | 2017-12-22 | 中国科学院光电研究院 | A kind of integrated gas laser |
Also Published As
| Publication number | Publication date |
|---|---|
| BE684973A (en) | 1967-01-16 |
| FR1487672A (en) | 1967-07-07 |
| DE1589070B2 (en) | 1973-03-29 |
| NL6613688A (en) | 1967-04-17 |
| DE1589070C3 (en) | 1973-10-11 |
| DE1589070A1 (en) | 1970-03-26 |
| NL140112B (en) | 1973-10-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE | Patent expired |