GB1042463A - Improvements in stimulated emitters of light - Google Patents

Improvements in stimulated emitters of light

Info

Publication number
GB1042463A
GB1042463A GB2531763A GB2531763A GB1042463A GB 1042463 A GB1042463 A GB 1042463A GB 2531763 A GB2531763 A GB 2531763A GB 2531763 A GB2531763 A GB 2531763A GB 1042463 A GB1042463 A GB 1042463A
Authority
GB
United Kingdom
Prior art keywords
light
active medium
kerr
electrodes
face
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
GB2531763A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB1042463A publication Critical patent/GB1042463A/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
    • H01S3/10—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
    • H01S3/107—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 electro-optic devices, e.g. exhibiting Pockels or Kerr effect
    • 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
    • H01S3/101—Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)
  • Semiconductor Lasers (AREA)

Abstract

1,042,463. Lasers; light modulation. C.S.F.- COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. June 25, 1963 [June 29, 1962], No. 25317/63. Headings H3B and H4F. A laser emits a scanning beam which is deflected by a variable reflecting system adjacent one face of the active medium 1, Fig. 1, the reflecting system comprising a Kerr cell 3 having a non-uniform electric field, a polarizer 6 and a reflecting surface 7. The active medium is pumped by a flash tube 8 and consists of a ruby the transmission face of which is a partial reflector 2. The non-uniform electric field is obtained in the Kerr cell by a plurality of longitudinal grid electrodes g, Fig. 2, having a non-uniform potential gradient, or by the use either of concentric electrodes A, B, Fig. 4, or the equivalent 101, 102 in part-cylindrical form, Fig. 6. These electrodes are connected to a source 50 or 103 of varying potential which permits light transmission to spread progressively across the face of the cell as the potential is reduced. Whenever the light permitted to pass through a region of the Kerr cell exceeds a critical value, stimulated emission takes place in that longitudinal part of the laser active medium receiving the reflected light as indicated by band Zi in Fig. 6. The position of this emission band determines the direction P of laser light transmitted by a lens 51. By using two part-cylindrical Kerr cells arranged orthogonally with respective electrodes 101, 102 and 201, 202, Figs. 8 and 9, connected to separate sources 51, 52 of varying voltage, two intersecting bands Zi, Zj are obtained which effectively permit stimulation to occur only at their intersection. This arrangement enables scanning movements of the emitted light beam to take place by appropriate control of the two voltage sources, the orthogonally-positioned Kerr cells 100, 200 being arranged at opposite ends of the active medium with their axes of symmetry at an angle of 45 degrees to the polarization plane of the emitted light. Quarter wave plates 301, 302 are provided to reverse the controlling action of the variable voltage sources 51 and 52.
GB2531763A 1962-06-29 1963-06-25 Improvements in stimulated emitters of light Expired GB1042463A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR902435A FR1340840A (en) 1962-06-29 1962-06-29 Device for emitting a light beam with electronic steering control

Publications (1)

Publication Number Publication Date
GB1042463A true GB1042463A (en) 1966-09-14

Family

ID=8782150

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2531763A Expired GB1042463A (en) 1962-06-29 1963-06-25 Improvements in stimulated emitters of light

Country Status (4)

Country Link
DE (1) DE1175792B (en)
FR (1) FR1340840A (en)
GB (1) GB1042463A (en)
NL (1) NL294706A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1193166B (en) * 1963-10-26 1965-05-20 Telefunken Patent Optical transmitter for at least two color components
DE1258988B (en) * 1963-11-29 1968-01-18 Zeiss Carl Fa Optical transmitter for generating coherent optical radiation
GB1055840A (en) * 1963-12-23 1967-01-18 Ibm Laser
DE1292769B (en) * 1964-01-31 1969-04-17 Siemens Ag Optical amplifier or transmitter (laser)
US3482182A (en) * 1964-05-01 1969-12-02 Ibm Controlled systems for effecting selective lasing
DE1223476B (en) * 1964-06-25 1966-08-25 Ibm Arrangement for deflecting the radiation of an optical transmitter or amplifier with the aid of Q-switching devices
NL6411121A (en) * 1964-09-24 1966-03-25
GB1066655A (en) * 1964-11-20 1967-04-26 Ibm Laser systems
US3432771A (en) * 1964-12-18 1969-03-11 Ibm Optical scanning techniques employing an optical cavity including two reflectors and a focussing objective
DE1489978B1 (en) * 1965-03-01 1972-02-03 Hughes Aircraft Co OPTICAL TRANSMITTER OR AMPLIFIER WITH AN ARRANGEMENT FOR THE SELECTION OF NATURAL VIBRATIONS
DE1278036B (en) * 1965-04-27 1968-09-19 Telefunken Patent Optical resonator
US3512870A (en) * 1967-08-31 1970-05-19 Dawson Inc Alexander Optical scanning apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2929922A (en) * 1958-07-30 1960-03-22 Bell Telephone Labor Inc Masers and maser communications system

Also Published As

Publication number Publication date
DE1175792B (en) 1964-08-13
FR1340840A (en) 1963-10-25
NL294706A (en)

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