GB1275548A - Improvements relating to lasers - Google Patents

Improvements relating to lasers

Info

Publication number
GB1275548A
GB1275548A GB459770A GB459770A GB1275548A GB 1275548 A GB1275548 A GB 1275548A GB 459770 A GB459770 A GB 459770A GB 459770 A GB459770 A GB 459770A GB 1275548 A GB1275548 A GB 1275548A
Authority
GB
United Kingdom
Prior art keywords
normal
optical axis
prisms
lasers
division
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
GB459770A
Inventor
Ian Gardner Cassels
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB459770A priority Critical patent/GB1275548A/en
Publication of GB1275548A publication Critical patent/GB1275548A/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
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • 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
    • H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
    • H01S3/1062—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using a controlled passive interferometer, e.g. a Fabry-Perot etalon

Abstract

1275548 Interferometers FERRANTI Ltd 19 April 1971 [30 Jan 1970] 4597/70 Heading G2J [Also in Division H1] An interferometer used in a laser, see Division H1, comprises the parallel facing surfaces 13, 17 of a pair of spaced dispersion prisms 10, 18, the distance between the surfaces being determined by a variable spacer consisting of a hollow cylinder of Piezo-electric material 21, Fig. 5 provided with control electrodes 22, 23. Each facing surface 11, 17 of the prisms is slightly off-normal to the optical axis 12, Fig. 2, while the other surfaces 11, 19 intersected by the optical axis are inclined to the normal by the Brewster Angle α.
GB459770A 1970-01-30 1970-01-30 Improvements relating to lasers Expired GB1275548A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB459770A GB1275548A (en) 1970-01-30 1970-01-30 Improvements relating to lasers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB459770A GB1275548A (en) 1970-01-30 1970-01-30 Improvements relating to lasers

Publications (1)

Publication Number Publication Date
GB1275548A true GB1275548A (en) 1972-05-24

Family

ID=9780173

Family Applications (1)

Application Number Title Priority Date Filing Date
GB459770A Expired GB1275548A (en) 1970-01-30 1970-01-30 Improvements relating to lasers

Country Status (1)

Country Link
GB (1) GB1275548A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460057A1 (en) * 1979-06-26 1981-01-16 Barr & Stroud Ltd COMPONENTS FOR LASERS
FR2512614A1 (en) * 1981-09-04 1983-03-11 Instruments Sa Multiplexing procedure for fibre=optic signals - uses fabry-perot etalon both to encode and decode signals from differing wavelength optical sources

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460057A1 (en) * 1979-06-26 1981-01-16 Barr & Stroud Ltd COMPONENTS FOR LASERS
FR2512614A1 (en) * 1981-09-04 1983-03-11 Instruments Sa Multiplexing procedure for fibre=optic signals - uses fabry-perot etalon both to encode and decode signals from differing wavelength optical sources

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees