CN105204115A - Middle-infrared band adjustable light delayer based on symmetrical metal clad waveguides - Google Patents
Middle-infrared band adjustable light delayer based on symmetrical metal clad waveguides Download PDFInfo
- Publication number
- CN105204115A CN105204115A CN201510651312.3A CN201510651312A CN105204115A CN 105204115 A CN105204115 A CN 105204115A CN 201510651312 A CN201510651312 A CN 201510651312A CN 105204115 A CN105204115 A CN 105204115A
- Authority
- CN
- China
- Prior art keywords
- infrared
- light
- gain media
- waveguides
- infrared band
- 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.)
- Granted
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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/1223—Basic optical elements, e.g. light-guiding paths high refractive index type, i.e. high-contrast waveguides
Abstract
The invention discloses a middle-infrared band adjustable light delayer based on symmetrical metal clad waveguides. The two identical metal clad waveguides are adopted and placed in a directly-facing mode, the space between two cladding layers is filled with middle-infrared gain media, and infrared incident light enters the middle-infrared gain media through an infrared laser in air, then is subjected to a series of reflection between the two symmetrical waveguides and is returned to the air as infrared emergent light. According to the middle-infrared band adjustable light delayer, a high-order-mode displacement enhancement effect is introduced into a middle-infrared band, the displacement magnitude is increased to the centimeter magnitude, and reverse displacement which does not exist in visible light and a near-infrared band is generated; Cr<2+> doped zinc-sulfur materials are utilized as the middle-infrared gain media, and the loss of a reflection cycle can be lowered from 3.1 dB to 2.7 dB; sulfur-series infrared glass serves as a waveguide layer, the penetration rate in the wave band ranging from 2 micrometers to 10 micrometers is high, and properties such as the refractive index are stable; the structure is simple, the delaying adjustable range can reach from 0 ns to 52.89 ns, and the relative delay amount is large.
Description
Technical field
The present invention relates to middle-infrared band optical time delay unit, especially relate to a kind of middle-infrared band controllable light chronotron based on the coated waveguide of symmetric metal.
Background technology
Since nineteen forty-seven Gu Sihanxin displacement be it is found that, how to strengthen the study hotspot that Gu Sihanxin displacement is scientific workers always.And since 21 century, the development of integrated optical device is very rapid, various novel optical device is constantly in the news out, and the optical device therefore based on the Gu Sihanxin displacement strengthened also arises at the historic moment.Existing research shows that high-order mode that metal-cladding waveguide excites can improve the skin depth of light greatly, thus produces larger displacement at reflecting surface, Gu Sihanxin displacement can be improved a hundreds of wavelength by the wavelength of tens in the past.When incident light is visible ray, displacement can reach a millimeter magnitude, and this structural manufacturing process is simple, and can combine with Circuits System, form multi-functional photoelectricity mixing module and system, will be applied widely in various fields such as filtering, sensing, biologies, there is very bright prospect.
Middle-infrared band (2 μm ~ 20 μm), be an important wave band in solar radiation light, it has very important application at each sciemtifec and technical sphere, comprises sensing, environmental monitoring, biomedical applications, thermal imaging etc.At present, be all confined to visible ray and near-infrared band to the research of metal-cladding waveguide high-order mode theory, it is bigger than normal to metal loss that this is subject to infrared light, invisibility and the impact of experimental implementation difficulty factor therefore caused.But middle infrared device is larger compared near ir devices size, technique is relatively more convenient, and Gu Sihanxin displacement enhancement effect is applied to middle-infrared band and further displacement magnitude can be expanded to centimetres, infrared gain material in simultaneously introducing, compensates the loss due to Mode Coupling and metal itself.
The existing research to adjustable light delay mainly uses following scheme:
1. the method for free space, the method changing optical path difference obtains adjustable delay, and this is also the method that the present invention mainly adopts.
2. the method for fiber grating, and circulator coordinates, and realizes the reflection of light at diverse location, reach the adjustable object of time delay by the local center wavelength changing Bragg grating.
3. utilize the temperature characterisitic of optical fiber, the temperature controlling optical fiber changes the refractive index of optical fiber, linearly changes light path.
Summary of the invention
The object of the present invention is to provide a kind of middle-infrared band controllable light chronotron based on the coated waveguide of symmetric metal, based on the Gu Sihanxin displacement enhancement effect of metal-cladding waveguide higher order mode, obtain adjustable negative sense Gu Sihanxin displacement, the ray trajectory of the figure of eight is adopted to increase the light path of advancing of actual light beam, and control optical path difference by the change thickness of metallic film and the fine setting of incident angle, realize light delay function and controlled, in introducing, infrared gain media is to make up Mode Coupling loss simultaneously.
The technical solution used in the present invention is as follows:
The present invention adopts two coated waveguides of same metal just to placement, infrared gain media in filling between two clads, infrared incident light is infrared gain media from the infrared laser air incides, then in the middle of two symmetrical waveguides through a series of reflection, return air by infrared emergent light.
Described two coated waveguides of same metal form by three-decker; Clad is the Ag films of thickness 10-50nm, and ducting layer is the chalcogenide infrared glass of thickness 3-5mm, and substrate layer is the Ag films of 200nm.
In described, infrared gain media is Cr
2+doping zinc chalcogenide material.
The beneficial effect that the present invention has is:
1, the displacement enhancement effect of high-order mode being incorporated into middle-infrared band, displacement magnitude is increased to centimetres, and create the reverse displacement do not had at visible ray and near-infrared band, providing possibility for realizing light delay.
2, Cr is utilized
2+doping zinc chalcogenide material as in infrared gain media, have good gain effect at 2.5 ~ 4 μm, through theoretical validation, the loss of a reflection circulation can be reduced to 2.7dB from 3.1dB.
3, the ducting layer that the present invention adopts is chalcogenide infrared glass, and high in 2-10 mu m waveband penetrance, the stable in properties such as refractive index, deposited by electron beam evaporation carries out metallic film evaporation process, and precision is higher.
4, the present invention's delayer more in the past, relatively simple for structure, and postpone adjustable extent and also can reach 0 ~ 52.89ns, relative retardation is large.
Accompanying drawing explanation
Fig. 1 is middle-infrared band metal-cladding waveguide structural representation.
Fig. 2 is middle-infrared band adjustable light delay structure and 8-shaped optical track mark schematic diagram.
Fig. 3 is reflection spot displacement and thickness of metal film graph of a relation.
In figure: in figure: 1, substrate layer, 2, ducting layer, 3, clad, 4, in infrared gain media, 5, air, 6, infrared laser, 7, an infrared incident light, 8, infrared emergent light, 9, infrared primary event light, 10, infrared second incident light, 11, infrared secondary reflection light, 12, light horizontal transmission direction.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
As shown in Figure 2, the present invention adopts two coated waveguides of same metal (MCW) just to placement, infrared gain media 4 in filling between two clads, infrared incident light 7 is infrared gain media 4 from the infrared laser 6 air 5 incides, then in the middle of two symmetrical waveguides through a series of reflection, return air 5 by infrared emergent light 8.
As shown in Figure 1, described two coated waveguides of same metal form by three-decker; Clad 3 is the Ag films of thickness 10-50nm, and ducting layer 2 is the chalcogenide infrared glass of thickness 3-5mm, and substrate layer 1 is the Ag films of 200nm.When ducting layer 2 thickness is grade, clad 3 and substrate layer 1 are that the structure of metal makes the mode step number of guided mode reach several thousand.
In described, infrared gain media 4 is the medium in middle-infrared band with gain, Cr2+ doping zinc chalcogenide material.
Due to substrate layer 1 and clad 3 refractive index be plural number characteristic, infrared light can directly therefrom infrared gain media 4 be coupled in waveguide, excite high-order mode, and on incidence point, produce reverse displacement, light path is advanced along the figure of eight, considerably increases optical path difference.
Change thickness or the adjustment incident angle of clad 3 Ag films, the size of negative sense displacement can be changed, thus change optical path difference, reach the object controlling amount of delay.
principle of work of the present invention is as follows:
As shown in Figure 2, during an infrared incident light 7 passes through, infrared gain media 4 incides the upper surface of lower floor MCW structure, and reverse displacement occurs, and infrared primary event light 9 reflexes to the lower surface of upper strata MCW structure from the upper surface of lower floor MCW structure.An infrared incident light 7 and infrared primary event light 9 are considered as primary event circulation.Equally, reverse displacement is there is at the lower surface of upper strata MCW structure, there is direction displacement in the upper surface that infrared second incident light 10 incides lower floor MCW structure from the lower surface of upper strata MCW structure simultaneously, reflected by infrared secondary reflection light 11, infrared second incident light 10 and infrared secondary reflection light 11 are considered as secondary reflection circulation.Because the lateral excursion of each reflection circulation is greater than reverse displacement, therefore light is propagated to the right along light horizontal transmission direction 12, until return air 5 by infrared emergent light 8.
Ducting layer 2 adopts the chalcogenide infrared glass material of 3mm, can hold at most more than 5000 pattern.Clad 3 adopts the silver metal film within 50nm.Two mutually isostructural MCW structures are just to placement, and light outgoing from the infrared laser 6 of air 5, incides Cr
2+in doping after infrared gain media 4, be refracted to the upper surface of lower floor MCW structure, penetrating metal film, when ducting layer 2 meets oscillating condition, form oscillating field i.e. high-order mode, phase place change peak can be produced at incidence point place, this also explains the displacement increased between incidence point and reflection spot, cannot penetrate because substrate layer 1 is thicker when light arrives lower surface.Impact due to high-order mode near incidence point on clad 3, produce reverse displacement, reflection spot is in the opposite direction of the incidence point direction of propagation, and therefore light is propagated to the right in the direction of the arrow along " 8 " font light path, finally returns air at MCW structure low order end by infrared emergent light 8.As shown in Figure 3, once incident and primary event being considered as a reflection circulation, by changing the thickness of clad silverskin, carrying out control S
nwith Z
sbetween relation, the cycle index of light needed for reflection process also changes thereupon, and therefore delay time is just adjusted.In Fig. 3, wavelength is 3 μm, and 0.86 ° and 2.95 ° is most high-order mode and time high-order mode coupling angle respectively.
Device architecture method for making of the present invention:
First by glass cutting machine, original sheet glass is cut into the thick rectangular parallelepiped sheet of 3mm, and both sides smooth finish of polishing, after Ultrasonic Cleaning slice, thin piece, by the metal film of electron beam evaporation instrument at two, glass surface difference evaporation different-thickness.Evaporation one sticks adhesive tape protection to another surface time surperficial, to ensure thickness accuracy.After completing two MCW structures, at central filler zinc sulfur materials, be positioned on the optics calibration platform in free space, adjustment incident angle is put and is met coupling condition.
Claims (3)
1. the middle-infrared band controllable light chronotron based on the coated waveguide of symmetric metal, it is characterized in that: two coated waveguides of same metal are just to placement, infrared gain media (4) in filling between two clads, infrared incident light (7) is infrared gain media (4) from the infrared laser (6) air (5) incides, then in the middle of two symmetrical waveguides through a series of reflection, return air (5) by infrared emergent light (8).
2. a kind of middle-infrared band controllable light chronotron based on the coated waveguide of symmetric metal according to claim 1, is characterized in that: described two coated waveguides of same metal form by three-decker; The Ag films that clad (3) is thickness 10-50nm, the chalcogenide infrared glass that ducting layer (2) is thickness 3-5mm, the Ag films that substrate layer (1) is 200nm.
3. a kind of middle-infrared band controllable light chronotron based on the coated waveguide of symmetric metal according to claim 1, is characterized in that: in described, infrared gain media (4) is Cr
2+doping zinc chalcogenide material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510651312.3A CN105204115B (en) | 2015-10-10 | 2015-10-10 | A kind of middle infrared band adjustable light delay based on symmetric metal cladding waveguide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510651312.3A CN105204115B (en) | 2015-10-10 | 2015-10-10 | A kind of middle infrared band adjustable light delay based on symmetric metal cladding waveguide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105204115A true CN105204115A (en) | 2015-12-30 |
| CN105204115B CN105204115B (en) | 2018-02-16 |
Family
ID=54951889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510651312.3A Active CN105204115B (en) | 2015-10-10 | 2015-10-10 | A kind of middle infrared band adjustable light delay based on symmetric metal cladding waveguide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105204115B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1420367A (en) * | 2001-11-21 | 2003-05-28 | 中国科学院光电技术研究所 | Metal enhanced reflection film and mfg. method thereof |
| CN1589513A (en) * | 2001-09-20 | 2005-03-02 | 阿拉巴玛州立大学伯明翰研究基金会 | Mid-ir microchip laser: ZnS:Cr2+ laser with saturable absorber material |
| CN102147537A (en) * | 2010-02-05 | 2011-08-10 | 财团法人中央大学校产学协力团 | Optical device using negative goos-hanchen shift |
-
2015
- 2015-10-10 CN CN201510651312.3A patent/CN105204115B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1589513A (en) * | 2001-09-20 | 2005-03-02 | 阿拉巴玛州立大学伯明翰研究基金会 | Mid-ir microchip laser: ZnS:Cr2+ laser with saturable absorber material |
| CN1420367A (en) * | 2001-11-21 | 2003-05-28 | 中国科学院光电技术研究所 | Metal enhanced reflection film and mfg. method thereof |
| CN102147537A (en) * | 2010-02-05 | 2011-08-10 | 财团法人中央大学校产学协力团 | Optical device using negative goos-hanchen shift |
Non-Patent Citations (5)
| Title |
|---|
| FUZI YANG 等: ""Long-range surface modes of metal-clad four-layer waveguides"", 《APPLIED OPTICS》 * |
| HONGGEN LI 等: ""Free-space coupling of a light beam into a symmetrical metal-cladding optical waveguide"", 《APPLIED PHYSICS LETTERS》 * |
| S. VASILYEV 等: ""High Power Kerr-Lens Mode-Locked Femtosecond mid-IR Laser with Efficient Second Harmonic Generation in Polycrystalline Cr2+:ZnS and Cr2+:ZnSe"", 《ADVANCED SOLID STATE LASERS》 * |
| XUANBIN LIU 等: ""Large positive and negative lateral optical beam shift in prism-waveguide coupling system"", 《PHYSICAL REVIEW E》 * |
| 曹庄琪 等: ""亚毫米尺度双面金属波导的超高阶模及其滤波特性研究"", 《光学学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105204115B (en) | 2018-02-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8270784B2 (en) | Waveguide device | |
| CN103633557B (en) | A kind of laser radar semiconductor laser light resource collimator and extender device | |
| CN101576711A (en) | Device and method for preparing optical waveguide in transparent solid material by femtosecond laser | |
| EP3161531B1 (en) | Improved reflection/absorption coating for laser slabs | |
| CN110014224A (en) | The femtosecond laser high efficient production device of infrared anti-reflection micro-structure | |
| US9780519B2 (en) | Flat waveguide-type laser device | |
| CN102096186A (en) | Continuous and adjustable type optical attenuator | |
| CN109693032A (en) | Laser cutting method and device | |
| US20120268939A1 (en) | Method of laser processing | |
| CN101726793A (en) | Optical waveguide and manufacturing method thereof | |
| CN105051859B (en) | By the hot-working for the mid-infrared laser for being transmitted through substrate | |
| CN105204115A (en) | Middle-infrared band adjustable light delayer based on symmetrical metal clad waveguides | |
| CN206076721U (en) | The mode locked fiber laser of iron-doped zinc selenide saturable absorbing mirror and its composition | |
| Bai et al. | Embedded optical waveguides fabricated in SF10 glass by low-repetition-rate ultrafast laser | |
| CN111370988A (en) | 1.55 mu m wave band Q-switched pulse laser | |
| CN116282971A (en) | Preparation method of single-mode single-crystal optical fiber energy field constraint microstructure | |
| CN103257395B (en) | There is the optical fiber of polarization function | |
| CN105068179B (en) | Optical fiber structure containing metal | |
| Gaudfrin et al. | Fused silica ablation by double femtosecond laser pulses with variable delays | |
| CN109407440B (en) | Single-mode high-power amplification device based on large-mode-field optical fiber | |
| CN205016829U (en) | Transition metal sulphide saturable absorbs mirror and mode locking fiber laser | |
| Nasu et al. | Waveguide interconnection in silica-based planar lightwave circuit using femtosecond laser | |
| CN202472030U (en) | Optical fiber with polarization function | |
| CN108326416A (en) | A kind of design producing apparatus on transparent conductive film and method | |
| Song et al. | Optical planar waveguide in magnesium aluminate spinel crystal using oxygen ion implantation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |