GB1482754A - Lasers - Google Patents

Lasers

Info

Publication number
GB1482754A
GB1482754A GB5376/74A GB537674A GB1482754A GB 1482754 A GB1482754 A GB 1482754A GB 5376/74 A GB5376/74 A GB 5376/74A GB 537674 A GB537674 A GB 537674A GB 1482754 A GB1482754 A GB 1482754A
Authority
GB
United Kingdom
Prior art keywords
mode
lines
multiple lobe
holography
laser
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
GB5376/74A
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.)
EMI Ltd
Original Assignee
EMI 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 EMI Ltd filed Critical EMI Ltd
Priority to GB5376/74A priority Critical patent/GB1482754A/en
Priority to DE19752503901 priority patent/DE2503901A1/en
Publication of GB1482754A publication Critical patent/GB1482754A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • 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
    • H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
    • H01S3/1123—Q-switching
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0402—Recording geometries or arrangements
    • G03H2001/0436—Holographic camera
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2222/00—Light sources or light beam properties
    • G03H2222/20—Coherence of the light source
    • 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
    • H01S2301/00—Functional characteristics
    • H01S2301/20—Lasers with a special output beam profile or cross-section, e.g. non-Gaussian
    • 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
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/08018—Mode suppression
    • H01S3/0804—Transverse or lateral modes
    • H01S3/08045—Single-mode emission
    • 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
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/08018—Mode suppression
    • H01S3/0804—Transverse or lateral modes
    • H01S3/0805—Transverse or lateral modes by apertures, e.g. pin-holes or knife-edges
    • 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
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/08059—Constructional details of the reflector, e.g. shape
    • H01S3/08063—Graded reflectivity, e.g. variable reflectivity mirror

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Holo Graphy (AREA)

Abstract

1482754 Holography EMI Ltd 13 Sept 1974 [6 Feb 1974] 05376/74 Heading G2J [Also in Division H1] An optically pumped solid state laser includes a mode selector, Fig. 3, which selects a multiple lobe transverse propagation mode, Fig. 1, while . suppressing the fundamental mode(s) and ensures that the multiple lobe mode remains substantially in the same location in a plane normal to the optic axis 12 of the laser. The central, concentric fundamental mode(s) are suppressed by the lines 8 engraved, etched, or evaporated on to an optically flat disc 4. The radial lines 7 are arranged to coincide with intensity minima of the multiple lobe mode, thereby preventing its rotation. In this way a relatively large diameter laser beam having coherence sufficient for holography is obtained. The lines, 7, 8 may be marked on the resonator mirror 1. For holographic purposes reference and object beams are derived by a beam-splitter 9, Fig. 6 which is a glass disc having a diffusing surface 16 and a polished one 17. A coated 34 degrees reflecting sector 18 produces the reference beam, the transmitted light, scattered by surface 16, constituting the object beam.
GB5376/74A 1974-02-06 1974-02-06 Lasers Expired GB1482754A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB5376/74A GB1482754A (en) 1974-02-06 1974-02-06 Lasers
DE19752503901 DE2503901A1 (en) 1974-02-06 1975-01-31 OPTICALLY PULSED SOLID-STATE LASER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5376/74A GB1482754A (en) 1974-02-06 1974-02-06 Lasers

Publications (1)

Publication Number Publication Date
GB1482754A true GB1482754A (en) 1977-08-17

Family

ID=9794973

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5376/74A Expired GB1482754A (en) 1974-02-06 1974-02-06 Lasers

Country Status (2)

Country Link
DE (1) DE2503901A1 (en)
GB (1) GB1482754A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519708A (en) * 1981-05-20 1985-05-28 Raytheon Company Mode discrimination apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331979C2 (en) * 1993-09-21 1997-02-13 Gregor Angelow Method for producing a diffuser for use in an optical resonator, device for producing a predeterminable light distribution with the diffuser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519708A (en) * 1981-05-20 1985-05-28 Raytheon Company Mode discrimination apparatus

Also Published As

Publication number Publication date
DE2503901A1 (en) 1975-08-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee