GB1065694A - Improvements relating to high power lasers - Google Patents

Improvements relating to high power lasers

Info

Publication number
GB1065694A
GB1065694A GB4888462A GB4888462A GB1065694A GB 1065694 A GB1065694 A GB 1065694A GB 4888462 A GB4888462 A GB 4888462A GB 4888462 A GB4888462 A GB 4888462A GB 1065694 A GB1065694 A GB 1065694A
Authority
GB
United Kingdom
Prior art keywords
crystal
reflecting
fixed
optical
output
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
Application number
GB4888462A
Inventor
Robert Dunsmuir
Michael Crossley Adamson
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
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.)
Filing date
Publication date
Application filed by Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB4888462A priority Critical patent/GB1065694A/en
Priority to FR958685A priority patent/FR1379289A/en
Publication of GB1065694A publication Critical patent/GB1065694A/en
Expired legal-status Critical Current

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
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/0602—Crystal lasers or glass 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
    • H01S3/02—Constructional details
    • H01S3/04—Arrangements for thermal management
    • H01S3/0404—Air- or gas cooling, e.g. by dry nitrogen
    • 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
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for 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
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
    • H01S3/1026—Controlling the active medium by translation or rotation, e.g. to remove heat from that part of the active medium that is situated on the resonator axis

Abstract

1,065,694. Lasers. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Dec. 30, 1963 [Dec. 28. 1962], No. 48884/62. Heading H1C. An annular crystal assembly 1, Fig. 2, is rotated at high speed about a light source 2, and provides an optical output from one or more fixed and partially-reflecting resonator systems 3 disposed about the crystal periphery. A continuous output is obtained if the rotating annulus is formed from a single crystal, e.g. ruby, or from a plurality of such crystals cemented together, while a series of output pulses is obtained if the crystals are spaced apart by a distance exceeding the width of a tuning system. The fixed resonator system 3 comprises either two reflecting optical flats, or a reflecting surface on or adjacent to one side of the annulus which co-operates with a fixed reflecting surface. Either or both reflecting surfaces may be partially reflecting and so provide the optical output. The speed of rotation selected is determined by the spontaneous emission lifetime of the active medium which for ruby doped with chromium is approximately 3 milliseconds. Consequently any excited elemental portion of the annulus must pass between the reflecting surfaces within this time, which gives an optional rotational speed of 20,000 r.p.m. Proportionally lower speeds are obtained by the use of a plurality of tuning systems equally spaced about the crystal periphery. A modification which also permits the rotational speed to be halved is the provision of a semi-circular reflector 4. Cooling may be effected by either gas blowers 5 or a liquid. The optical resonator may be modified by the use of a crystal of trapezium section. An arrangement is shown in Fig. 3 in which the output light path 6 from a rotating optical resonator system 3 is directed by prisms 7, 8 along the axis of a fixed annular crystal. It is stated that a straight or slightly curved crystal may be used in association with a resonator system, one of these components being fixed and the other reciprocated.
GB4888462A 1962-12-28 1962-12-28 Improvements relating to high power lasers Expired GB1065694A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB4888462A GB1065694A (en) 1962-12-28 1962-12-28 Improvements relating to high power lasers
FR958685A FR1379289A (en) 1962-12-28 1963-12-27 High power laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4888462A GB1065694A (en) 1962-12-28 1962-12-28 Improvements relating to high power lasers

Publications (1)

Publication Number Publication Date
GB1065694A true GB1065694A (en) 1967-04-19

Family

ID=10450313

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4888462A Expired GB1065694A (en) 1962-12-28 1962-12-28 Improvements relating to high power lasers

Country Status (1)

Country Link
GB (1) GB1065694A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2284966A1 (en) * 2005-01-12 2011-02-16 Raytheon Company High energy solid-state laser with offset pump and extraction geometry

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2284966A1 (en) * 2005-01-12 2011-02-16 Raytheon Company High energy solid-state laser with offset pump and extraction geometry
EP1864357B1 (en) * 2005-01-12 2011-06-22 Raytheon Company High energy solid-state laser with offset pump and extraction

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