DE19727125A1 - Fabry-Perot resonator in optical waveguide for narrowband filter without reflection - Google Patents
Fabry-Perot resonator in optical waveguide for narrowband filter without reflectionInfo
- Publication number
- DE19727125A1 DE19727125A1 DE1997127125 DE19727125A DE19727125A1 DE 19727125 A1 DE19727125 A1 DE 19727125A1 DE 1997127125 DE1997127125 DE 1997127125 DE 19727125 A DE19727125 A DE 19727125A DE 19727125 A1 DE19727125 A1 DE 19727125A1
- Authority
- DE
- Germany
- Prior art keywords
- mode
- waveguide
- optical waveguide
- converter
- reflection
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
- G02B6/29323—Coupling to or out of the diffractive element through the lateral surface of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/14—Mode converters
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
- G02B6/29356—Interference cavity within a single light guide, e.g. between two fibre gratings
-
- 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
- G02F1/01—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 intensity, phase, polarisation or colour
- G02F1/011—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 intensity, phase, polarisation or colour in optical waveguides, not otherwise provided for in this subclass
-
- 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
- G02F1/01—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 intensity, phase, polarisation or colour
- G02F1/21—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 intensity, phase, polarisation or colour by interference
- G02F1/225—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 intensity, phase, polarisation or colour by interference in an optical waveguide structure
-
- 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
- G02F1/01—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 intensity, phase, polarisation or colour
- G02F1/011—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 intensity, phase, polarisation or colour in optical waveguides, not otherwise provided for in this subclass
- G02F1/0115—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 intensity, phase, polarisation or colour in optical waveguides, not otherwise provided for in this subclass in optical fibres
Abstract
Description
Die vorliegende Erfindung betrifft eine Vorrichtung, bei der ein Resonator aus zwei Modenkonvertern in einem optischen Wellenleiter ein schmalbandiges Filter ohne oder vernachlässigbare Reflexion bildet.The present invention relates to a device in which a resonator consists of two Mode converters in an optical waveguide a narrow band filter without or forms negligible reflection.
Bisherige schmalbandige Filter, z. B. Faser Fabry-Perot Resonatoren, auf der Basis von Faser-Bragg Gittern haben den Nachteil, daß sie eine hohe Reflexion besitzen. Aufgrund dieses Verhaltens sind sie z. B. nicht in Lasern einsetzbar, um eine möglichst hohe spektrale Schmalbandigkeit zu erzielen.Previous narrowband filters, e.g. B. fiber Fabry-Perot resonators, based on fiber Bragg Grids have the disadvantage that they have a high reflection. Because of this Behavior, they are e.g. B. not usable in lasers to get the highest possible spectral To achieve narrow band.
Wünschenswert wäre ein schmalbandiger Verlust ohne Reflexion, in dem sich ein noch schmalbandigeres Transmissionsfenster öffnen läßt.It would be desirable to have a narrow-band loss without reflection, in which there is still one allows to open a narrow-band transmission window.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß ein optischer Wellenleiter auf einem Abschnitt derart behandelt wird, daß er dort mindestens eine oder mehrere zusätzliche Moden führen kann. Die Aufgabe des Modenkonverters besteht darin kontradirektional eine oder mehrere der außerhalb des behandelten Wellenleiters geführten Moden in eine oder mehrere der zusätzlich im behandelten Bereich des Wellenleiters geführten Moden überzukoppeln. Damit stellt der Modenkonverter in einem so vorbereiteten Wellenleiter einen Verlust dar, da das konvertierte, reflektierte Licht im unbehandelten Wellenleiter nicht geführt werden kann und abgestrahlt wird.This object is achieved in that an optical waveguide a section is treated in such a way that it contains at least one or more additional ones Can lead fashions. The task of the mode converter is contradirectionally one or more of the modes guided outside the treated waveguide into one or several of the additional modes in the treated area of the waveguide to couple over. The mode converter thus provides a waveguide prepared in this way Loss because the converted, reflected light is not guided in the untreated waveguide can be and is emitted.
Werden zwei Konverter in dem behandelten Stück des Wellenleiters realisiert, so entsteht ein Resonator. Abhängig von der Phasenlage zwischen den Konvertern kommt es zu einer Resonanz für eine Phase von π/2 mod π. Damit kann ein schmalbandiger Verlust mit einem weitaus schmalbandigerem Transmissionsfenster realisiert werden.If two converters are implemented in the treated piece of the waveguide, one is created Resonator. Depending on the phase position between the converters, one occurs Resonance for a phase of π / 2 mod π. A narrow-band loss with a transmission window that is much narrower.
Konkret erfüllt ein schräges Bragg-Gitter in einer monomodigen Glasfaser oder einem monomodigen integriert-optischen Wellenleiter, das den Wellenleiter im Bereich des Gitters aufgrund des im Gitterschreibprozeß induzierten Brechzahlhubes zweimodig oder noch höhermodig werden läßt, die Bedingungen an den zuvor geschilderten Konverter.Specifically, an oblique Bragg grating in a single-mode glass fiber or meets single-mode integrated optical waveguide, which is the waveguide in the area of the grating due to the refractive index stroke induced in the grating writing process, two-mode or still can be higher fashioned, the conditions of the converter described above.
Um die Resonatorkonfiguration zu realisieren, wird ein Stück des monomodigen, integriert- optischen Wellenleiters oder der optischen Faser durch UV-Belichtung zweimodig gemacht. Daraufhin werden in diesen Bereich zwei schräge Bragg-Gitter eingeschrieben. Der Grundmodus des optischen Wellenleiters wird hier mit Mode A und der höhere Modus im behandelten Wellenleiterbereich mit Modus B bezeichnet. Der Modenkonverter, bestehend aus einem schrägen Bragg-Gitter, konvertiert dabei Mode A zu Mode B und umgekehrt. Wie Fig. 1 zeigt, sind alle in vorwärts Richtung laufenden Wellen im Modus A und alle rückwärts laufenden Wellen im Modus B. Damit kann es zu keiner Reflexion durch diese Vorrichtung kommen, da Modus B außerhalb des behandelten Wellenleiters nicht ausbreitungsfähig ist und abgestrahlt wird. Entspricht die optische Weglänge zwischen den Konvertern einer Phase von π/2 mod π, so öffnet sich im Stopband des Fasergitters ein schmalbandiges Transmissionsfenster.To implement the resonator configuration, a piece of the single-mode, integrated optical waveguide or the optical fiber is made two-mode by UV exposure. Then two oblique Bragg gratings are inscribed in this area. The basic mode of the optical waveguide is referred to here as mode A and the higher mode in the treated waveguide area is referred to as mode B. The mode converter, consisting of an oblique Bragg grating, converts mode A to mode B and vice versa. As shown in FIG. 1, all waves traveling in the forward direction are in mode A and all waves traveling in reverse are in mode B. This means that there can be no reflection by this device, since mode B cannot be propagated outside the treated waveguide and is emitted. If the optical path length between the converters corresponds to a phase of π / 2 mod π, a narrow-band transmission window opens in the stop band of the fiber grating.
Eine Faserlaser kann durch diese Vorrichtung auf eine oder einige wenige longitudinale Moden beschränkt werden.A fiber laser can be directed to one or a few longitudinal ones by this device Fashions are limited.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997127125 DE19727125A1 (en) | 1997-06-26 | 1997-06-26 | Fabry-Perot resonator in optical waveguide for narrowband filter without reflection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997127125 DE19727125A1 (en) | 1997-06-26 | 1997-06-26 | Fabry-Perot resonator in optical waveguide for narrowband filter without reflection |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19727125A1 true DE19727125A1 (en) | 1999-01-07 |
Family
ID=7833693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1997127125 Withdrawn DE19727125A1 (en) | 1997-06-26 | 1997-06-26 | Fabry-Perot resonator in optical waveguide for narrowband filter without reflection |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19727125A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1202089A1 (en) * | 2000-10-31 | 2002-05-02 | PIRELLI CAVI E SISTEMI S.p.A. | Optical fibre filter |
EP1489445A1 (en) * | 2003-06-20 | 2004-12-22 | Alcatel | A non-reflective optical waveguide filter with a slanted Bragg grating |
DE102009041891A1 (en) * | 2009-09-18 | 2011-03-31 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Transverse mode filter for waveguides |
CN109167131A (en) * | 2018-08-02 | 2019-01-08 | 电子科技大学 | A kind of rectangular wave inducing defecation by enema and suppository wave interference filter |
-
1997
- 1997-06-26 DE DE1997127125 patent/DE19727125A1/en not_active Withdrawn
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1202089A1 (en) * | 2000-10-31 | 2002-05-02 | PIRELLI CAVI E SISTEMI S.p.A. | Optical fibre filter |
WO2002037150A1 (en) * | 2000-10-31 | 2002-05-10 | Pirelli S.P.A. | Optical fibre filter |
US7177511B2 (en) | 2000-10-31 | 2007-02-13 | Pirelli S.P.A. | Optical fiber, optical fiber filter, and optical amplifier |
EP1489445A1 (en) * | 2003-06-20 | 2004-12-22 | Alcatel | A non-reflective optical waveguide filter with a slanted Bragg grating |
FR2856482A1 (en) * | 2003-06-20 | 2004-12-24 | Cit Alcatel | OPTICAL FILTER |
US7095924B2 (en) | 2003-06-20 | 2006-08-22 | Alcatel | Optical filter |
DE102009041891A1 (en) * | 2009-09-18 | 2011-03-31 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Transverse mode filter for waveguides |
US8891917B2 (en) | 2009-09-18 | 2014-11-18 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Transverse mode filter for waveguides |
CN109167131A (en) * | 2018-08-02 | 2019-01-08 | 电子科技大学 | A kind of rectangular wave inducing defecation by enema and suppository wave interference filter |
CN109167131B (en) * | 2018-08-02 | 2020-03-27 | 电子科技大学 | Rectangular waveguide normal wave interference filter |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5048913A (en) | Optical waveguide embedded transverse spatial mode discrimination filter | |
DE69034102T2 (en) | Arrangement of an optical fiber with a variable Bragg filter | |
DE2750322C3 (en) | Optical device for coupling the radiation emerging from a semiconductor laser into an optical fiber | |
US5016967A (en) | Multi-core optical waveguide Bragg grating light redirecting arrangement | |
DE69816662T2 (en) | NARROW-BAND BLOCKING FILTERS IN THE FOCUS | |
US5778119A (en) | In-line grating device for forward coupling light | |
DE2745940A1 (en) | OPTICAL CIRCUIT ELEMENT | |
EP0296676B1 (en) | Non-reciprocal optical component, particularly for use as isolator or circulator | |
DE69822362T2 (en) | Space filter for a high power laser beam | |
WO2011033031A1 (en) | Tunable wavelength light source | |
EP0042514A1 (en) | Planar wave guide lens, its application and manufacture | |
EP2478400B1 (en) | Transverse mode filter for waveguides | |
DE69830643T2 (en) | Optical RF signal processing | |
JP2001501747A (en) | Optical waveguide filter | |
DE19911182C2 (en) | Fiber transmission component for generating chromatic dispersion | |
DE19727125A1 (en) | Fabry-Perot resonator in optical waveguide for narrowband filter without reflection | |
EP0216212A2 (en) | External optical resonator for a semiconductor laser | |
US6253008B1 (en) | Optical filter and method of making the same | |
DE69923228T2 (en) | FIBER OPTIC CIRCLE | |
DE3134250A1 (en) | METHOD FOR THE MULTIPLE USE OF FIBER OPTICAL CORDS IN THE WAVELENGTH MULTIPLEX | |
DE2930681A1 (en) | Interference element for multichannel optical waveguide - is used for filtering, dividing, switching or modulating transmitted signal and is designed for low losses | |
EP0737872A2 (en) | Optical branching element | |
DE3446816A1 (en) | OPTICAL COUPLER | |
DE4134959A1 (en) | WAVELENGTH FILTER FOR LIGHT WAVE GUIDES | |
DE10056861C1 (en) | Mode exciting device for optical waveguide, uses reflector that deflects reflected edge beam of coherent beam onto entry face onto which edge beams of coherent beam are directed |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8127 | New person/name/address of the applicant |
Owner name: JOHLEN, DIETMAR, 81541 MUENCHEN, DE KLOSE, PETER, |
|
8139 | Disposal/non-payment of the annual fee |