GB1152706A – High Power Lasers.
– Google Patents
GB1152706A – High Power Lasers.
– Google Patents
High Power Lasers.
Info
Publication number
GB1152706A
GB1152706A
GB1885966A
GB1885966A
GB1152706A
GB 1152706 A
GB1152706 A
GB 1152706A
GB 1885966 A
GB1885966 A
GB 1885966A
GB 1885966 A
GB1885966 A
GB 1885966A
GB 1152706 A
GB1152706 A
GB 1152706A
Authority
GB
United Kingdom
Prior art keywords
modes
active medium
compensators
discharge
vessel
Prior art date
1965-04-30
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
Application number
GB1885966A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date 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 date listed.)
1965-04-30
Filing date
1966-04-29
Publication date
1969-05-21
1966-04-29
Application filed by International Standard Electric Corp
filed
Critical
International Standard Electric Corp
1969-05-21
Publication of GB1152706A
publication
Critical
patent/GB1152706A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
H01S3/09—Processes or apparatus for excitation, e.g. pumping
H01S3/097—Processes or apparatus for excitation, e.g. pumping by gas discharge of a gas laser
H01S3/0975—Processes or apparatus for excitation, e.g. pumping by gas discharge of a gas laser using inductive or capacitive excitation
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
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
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
Abstract
1,152,706. Lasers; discharge lamps. INTERNATIONAL STANDARD ELECTRIC CORP. 29 April, 1966 [30 April, 1965], No. 18859/66. Headings H1C and H1D. A discharge tube in which stimulated emission of radiation may be produced includes a discharge space of annular cross-section containing a gaseous active medium and defined laterally by inner and outer walls of the vessel, and is provided with a coil for producing a discharge in the space when supplied with radio-frequency energy. The spacing between the walls is selected to correspond to the skin-effect depth at the frequency of the r.f. supply. Coolant is passed through the vessel inside the inner wall and also through the hollow r.f. coil. The discharge space contains helium and neon at reduced pressure and mirrors are provided at each end to form a resonant cavity for producing laser action. If the pumping energy is sufficiently high, several oscillatory modes corresponding to a desired energy transition are produced at various positions around the annular active medium, as well as several modes corresponding to other, undesired, transitions. In a first embodiment (Fig. 2, not shown), in which the vessel walls are cylindrical, a carrier is therefore provided between one mirror and the active medium and on this carrier are provided » compensators » and » mode selectors.» The compensators may be transparent plates having a thickness of about one millimeter and arranged obliquely to the radiation path, or metallic needles. The compensators are placed in line with the axes of the desired modes and couple the modes between themselves. The output may be focused by a lens. Undesired modes are suppressed by opaque masks and non-axial modes may be prevented by means of longitudinal opaque partitions in the active medium or outside of it. In another embodiment (Fig. 3, not shown), the vessel walls each form a frustum of a cone and the modes form progressive waves around the active medium. The desired modes are selected by providing small shutters having the desired angular periodicity around the axis of the cones. The output is passed through a prismatic ring and a lens to focus it to a point. The compensators used in the previous embodiment may be used but are not essential. The progressive waves rotating in one direction may be selected at the expense of those rotating in the opposite direction by means of a diaphragm with holes spaced around it. It is stated that the » cones » may have hyperboloidal sections.
GB1885966A
1965-04-30
1966-04-29
High Power Lasers.
Expired
GB1152706A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR15269A
FR1444011A
(en)
1965-04-30
1965-04-30
High power gas laser
Publications (1)
Publication Number
Publication Date
GB1152706A
true
GB1152706A
(en)
1969-05-21
Family
ID=8577670
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1885966A
Expired
GB1152706A
(en)
1965-04-30
1966-04-29
High Power Lasers.
Country Status (4)
Country
Link
BE
(1)
BE680267A
(en)
FR
(1)
FR1444011A
(en)
GB
(1)
GB1152706A
(en)
NL
(1)
NL6605801A
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2204990A
(en)
*
1987-05-13
1988-11-23
English Electric Valve Co Ltd
Laser gas discharge apparatus
GB2400975A
(en)
*
2003-04-17
2004-10-27
Jenact Ltd
Light source
1965
1965-04-30
FR
FR15269A
patent/FR1444011A/en
not_active
Expired
1966
1966-04-29
NL
NL6605801A
patent/NL6605801A/xx
unknown
1966-04-29
GB
GB1885966A
patent/GB1152706A/en
not_active
Expired
1966-04-29
BE
BE680267D
patent/BE680267A/xx
unknown
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2204990A
(en)
*
1987-05-13
1988-11-23
English Electric Valve Co Ltd
Laser gas discharge apparatus
GB2204990B
(en)
*
1987-05-13
1991-09-18
English Electric Valve Co Ltd
Laser apparatus
GB2400975A
(en)
*
2003-04-17
2004-10-27
Jenact Ltd
Light source
GB2400975B
(en)
*
2003-04-17
2006-04-12
Jenact Ltd
A light source and a method of manufacture thereof
Also Published As
Publication number
Publication date
FR1444011A
(en)
1966-07-01
BE680267A
(en)
1966-10-31
NL6605801A
(en)
1966-10-31
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Legal Events
Date
Code
Title
Description
1969-10-01
PS
Patent sealed
1970-11-25
PLNP
Patent lapsed through nonpayment of renewal fees
