EP2691804A1 - Dispositif servant à dévier un rayonnement laser et dispositif à laser comportant un tel dispositif - Google Patents

Dispositif servant à dévier un rayonnement laser et dispositif à laser comportant un tel dispositif

Info

Publication number
EP2691804A1
EP2691804A1 EP12712609.2A EP12712609A EP2691804A1 EP 2691804 A1 EP2691804 A1 EP 2691804A1 EP 12712609 A EP12712609 A EP 12712609A EP 2691804 A1 EP2691804 A1 EP 2691804A1
Authority
EP
European Patent Office
Prior art keywords
laser radiation
waveguide
laser
deflected
exit surface
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.)
Withdrawn
Application number
EP12712609.2A
Other languages
German (de)
English (en)
Inventor
Aleksei Mikhailov
Aliaksei KRASNABERSKI
Yuri KOLOTUSHKIN
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.)
Focuslight Germany GmbH
Original Assignee
Limo Patentverwaltung GmbH and Co KG
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 Limo Patentverwaltung GmbH and Co KG filed Critical Limo Patentverwaltung GmbH and Co KG
Publication of EP2691804A1 publication Critical patent/EP2691804A1/fr
Withdrawn legal-status Critical Current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
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
    • G02F1/295—Analog deflection from or in an optical waveguide structure]

Definitions

  • the present invention relates to a device for deflecting laser radiation according to the preamble of claim 1 and to a laser device according to the preamble of claim 10.
  • In the propagation direction of the laser radiation means propagation direction of the laser radiation, especially if this is not a plane wave or at least partially divergent.
  • laser beam, light beam, sub-beam or beam is, unless expressly stated otherwise, not an idealized beam of geometric optics meant, but a real light beam, such as a laser beam, which has no infinitesimal small, but an extended beam cross-section.
  • a device of the type mentioned is known for example from US 6,449,084 B1.
  • the apparatus described therein comprises a waveguide in the form of a cuboid, which is considerably more extensive in a first transverse direction than in a second, perpendicular to the first, transverse direction. This results in a largely planar geometry in which electrodes for deflecting the laser radiation are arranged on the extensive flat sides.
  • the main advantage of the planar geometry is the substantial reduction of the control voltage despite the large possible deflection angle.
  • the problem underlying the present invention is the provision of a device of the type mentioned, which can prevent or at least reduce a change in the profile of the laser radiation. Furthermore, a laser device should be specified with such a device.
  • Waveguide in the first direction has a size such that the profile of the laser radiation after exiting the
  • Exit surface corresponds to the profile of the laser radiation before entering the entrance surface.
  • laser beams result in the possibility of arranging two mutually perpendicular waveguides one behind the other, in order to successively position the laser radiation in two mutually perpendicular directions
  • the shape of the electrodes can be chosen comparatively freely. It may be provided in particular that the distance between the entry surface and the exit surface of the at least one
  • Waveguide in the first direction of the Talbot length or an integer multiple of the Talbot length for light with the wavelength of the laser radiation to be deflected corresponds.
  • the profile preservation of the laser radiation is achieved by external geometric specifications.
  • Waveguide in the first direction of half the Talbotander or an odd number of times half of the Talbot length for light with the wavelength of the laser radiation to be deflected corresponds.
  • D is the extension of the at least one waveguide in the third direction and ⁇ 0 is the vacuum wavelength of the laser radiation to be deflected.
  • the laser device is characterized in that the device for deflecting laser radiation a
  • Fig. 1 is a schematic side view of a first
  • Fig. 2 is a plan view of the device of FIG. 1;
  • Fig. 3 is a Fig. 1 corresponding schematic side view of
  • FIG. 4 shows a schematic side view corresponding to FIG. 1 of a device according to the prior art
  • Fig. 5 is a schematic side view of a second
  • FIG. 6 is a plan view of the device according to FIG. 5.
  • FIGS. 1 and 2 The embodiment of a device according to the invention shown in FIGS. 1 and 2 comprises a waveguide 1 which has a transparent substrate 2 and a plurality of thin, flat electrodes 3, 4, 5.
  • the electrodes 3, 4, 5 can either be applied directly to the substrate 2 or from this each separated by one or more suitable intermediate layers.
  • the substrate is parallelepiped-shaped and has an extension L in a first direction Z, an extension B in a second direction X and an extension D in a third direction Y.
  • the extent B in the second direction X is significantly larger,
  • an electrode 3 which covers the lower side, in particular over its full area, is arranged, which is connected to a first potential.
  • the first potential may be connected to the ground, as indicated schematically in FIG.
  • two electrodes 4, 5 are arranged with a triangular outline.
  • the triangles of the electrodes are offset by 180 ° to each other, so that the tip of one triangle is flush with the base of the other triangle and vice versa.
  • the two electrodes are shown only schematically and, apart from a narrow slot between them, can extend together over almost the entire upper side of the substrate 2.
  • the first electrode 4 of the two electrodes is connected to a second potential, wherein a voltage + V can be present between the second potential and the first potential.
  • Electrode 5 of the two electrodes is connected to a third potential, it being possible for a voltage -V to be present between the third potential and the first potential.
  • the absolute values of the voltages + V and -V can be equal.
  • the geometry of the electrodes 3, 4, 5 and the geometry of the substrate 2 and the voltage + V, -V are chosen so that one in the
  • Entry surface 6 entering laser radiation is deflected at applied voltage in the X direction.
  • the substrate 2 On its left side in FIG. 1 and FIG. 2, the substrate 2 has an entry surface 6, into which the laser radiation to be deflected can enter.
  • the substrate 2 On its right side in FIG. 1 and FIG. 2, the substrate 2 has an exit surface 7, from which the laser radiation to be deflected can emerge.
  • the entry and exit surfaces 6, 7 each extend in an X-Y plane and are spaced apart in the Z-direction by a distance corresponding to the extent L of the
  • Substrate 2 corresponds in the Z direction.
  • L T 8 ⁇ 2 / ⁇ 0
  • n is the refractive index of the waveguide 1 or the substrate 2 of the waveguide 1
  • D is the extension of the waveguide 1 or of the substrate 2 of the waveguide 1 in the Y direction
  • ⁇ 0 the vacuum wavelength of the deflected
  • the extent L or the distance of the entrance surface 6th from the exit surface 7 equal to half the Talbot length LT or an odd-numbered multiple of half the Talbot length L T be.
  • a laser radiation 8 enters obliquely from below into the entry surface 6 and obliquely upward from the exit surface 7. Thus, it does not change its original propagation direction with respect to the Y direction, but is deflected only by the application of corresponding voltages + V and -V with respect to the X direction.
  • FIG. 4 shows the passage of a comparable
  • Laser radiation 8 does not contribute to its profile and, after emerging from the exit surface 7 ', diverge in the Y direction. This is indicated in Figure 4 by the propagating in two directions laser radiation 8 'and 8 ".
  • the laser radiation is deflected in the positive direction X, without causing a widening of the Laser radiation 8 takes place. Furthermore, there is no influence on the laser radiation 8 in the Y direction.
  • the laser radiation is deflected in the positive Y direction, without causing a widening of the
  • Laser radiation 8 deflected in both the X and Y direction, without the profile of the laser radiation has changed.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Lasers (AREA)
  • Optical Integrated Circuits (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

L'invention concerne un dispositif servant à dévier un rayonnement laser (8), comprenant un guide d'ondes (1) muni d'une surface d'entrée (6) et d'une surface de sortie (7), qui sont dans la direction Z à une certaine distance (L) l'une de l'autre, le guide d'ondes (1) présentant dans la direction X une plus grande extension que dans la direction Y. Ledit dispositif servant à dévier un rayonnement laser comprend également au moins deux électrodes (4, 5) qui sont disposées sur le guide d'ondes (1), une tension de déviation (+V, -V) pouvant être appliquée auxdites deux électrodes (4, 5) ou plus, de telle sorte que le rayonnement laser est dévié de manière électro-optique dans le guide d'ondes (1) du point de vue de la direction X. La distance (L) entre les surfaces d'entrée (6) et de sortie (7) du guide d'ondes (1) dans la direction Z présente une valeur telle que le profil du rayonnement laser après la sortie par la surface de sortie (7) correspond au profil du rayonnement laser avant l'entrée par la surface d'entrée (6). En particulier, la distance (L) correspond en l'occurrence à la longueur de Talbot du rayonnement laser.
EP12712609.2A 2011-03-29 2012-03-15 Dispositif servant à dévier un rayonnement laser et dispositif à laser comportant un tel dispositif Withdrawn EP2691804A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011015411A DE102011015411A1 (de) 2011-03-29 2011-03-29 Vorrichtung zur Ablenkung von Laserstrahlung sowie Laservorrichtung mit einer derartigen Vorrichtung
PCT/EP2012/054608 WO2012130632A1 (fr) 2011-03-29 2012-03-15 Dispositif servant à dévier un rayonnement laser et dispositif à laser comportant un tel dispositif

Publications (1)

Publication Number Publication Date
EP2691804A1 true EP2691804A1 (fr) 2014-02-05

Family

ID=45932297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12712609.2A Withdrawn EP2691804A1 (fr) 2011-03-29 2012-03-15 Dispositif servant à dévier un rayonnement laser et dispositif à laser comportant un tel dispositif

Country Status (7)

Country Link
US (1) US20140023105A1 (fr)
EP (1) EP2691804A1 (fr)
JP (1) JP2014512570A (fr)
KR (1) KR20140060460A (fr)
CN (1) CN103430081A (fr)
DE (1) DE102011015411A1 (fr)
WO (1) WO2012130632A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102585256B1 (ko) 2016-11-11 2023-10-05 삼성전자주식회사 빔 스티어링 장치 및 이를 포함하는 시스템
CN106842760B (zh) * 2017-03-08 2019-10-15 暨南大学 一种用阵列电极进行光束偏转的铌酸锂波导及制作方法
US11837838B1 (en) 2020-01-31 2023-12-05 Freedom Photonics Llc Laser having tapered region
EP4352839A1 (fr) * 2021-06-10 2024-04-17 Freedom Photonics LLC Conceptions destinées à la commande de courant latéral dans des amplificateurs optiques et des lasers

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3489904A (en) * 1965-10-18 1970-01-13 Nat Eng Science Co Laser beam tracking apparatus
JPS63199480A (ja) * 1987-02-16 1988-08-17 Sharp Corp 半導体レ−ザ走査装置
JP3144270B2 (ja) * 1995-06-21 2001-03-12 富士ゼロックス株式会社 光偏向素子
JPH1039346A (ja) * 1996-07-26 1998-02-13 Sony Corp 電気光学素子
US6169757B1 (en) * 1997-09-26 2001-01-02 Scott A. Merritt Intermodal phase difference controller for beam angle modulation in index guided semiconductor devices
US6449084B1 (en) 1999-05-10 2002-09-10 Yanping Guo Optical deflector
US6963118B2 (en) * 2001-05-17 2005-11-08 Sioptical, Inc. Hybrid active and electronic circuit with evanescent coupling
US6975782B2 (en) * 2002-10-21 2005-12-13 Finisar Corporation Optical deflector using electrooptic effect to create small prisms
US7027670B2 (en) * 2003-10-17 2006-04-11 Fujitsu Limited Cascaded deflectors for multi-channel optical switches, and optical switching modules and methods having cascaded deflectors
US7239777B1 (en) * 2006-03-09 2007-07-03 Lockheed Martin Coherent Technologies, Inc. Method and apparatus to coherently combine high-power beams in self-imaging waveguides
JP5130810B2 (ja) * 2007-07-13 2013-01-30 沖電気工業株式会社 光偏向器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012130632A1 *

Also Published As

Publication number Publication date
CN103430081A (zh) 2013-12-04
US20140023105A1 (en) 2014-01-23
DE102011015411A1 (de) 2012-10-04
WO2012130632A1 (fr) 2012-10-04
JP2014512570A (ja) 2014-05-22
KR20140060460A (ko) 2014-05-20

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