CN104948956A - Multicomponent glass up-conversion white light optical fiber lighting device - Google Patents

Multicomponent glass up-conversion white light optical fiber lighting device Download PDF

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Publication number
CN104948956A
CN104948956A CN201510348639.3A CN201510348639A CN104948956A CN 104948956 A CN104948956 A CN 104948956A CN 201510348639 A CN201510348639 A CN 201510348639A CN 104948956 A CN104948956 A CN 104948956A
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multicomponent glass
fiber
optical fiber
light
conversion
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CN104948956B (en
Inventor
郑加金
王轩
郑锐林
袁野
韦玮
闵丹
陈志炜
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Nanjing Post and Telecommunication University
Nanjing University of Posts and Telecommunications
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Nanjing Post and Telecommunication University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders

Abstract

The invention discloses a multicomponent glass up-conversion white light optical fiber lighting device. The device comprises a 980 nm pumping laser, a 980 nm laser optic transmission fiber, a fiber spectroscopy and coupled system and a spirally-wound side face light-emitting multicomponent glass optical fiber. After 980 nm pumping light is transmitted through the optic transmission fiber in a long-distance mode, the 980 nm pumping light enters the two ends of the spirally-wound side face light-emitting multicomponent glass optical fiber through the fiber spectroscopy and coupled system. The core of the optical fiber is made of tellurate multicomponent glass, and the cladding is made of multicomponent glass in which tellurate is used as the base material and one or more rare earth ions are evenly doped to serve as the light-emitting center. The 980 nm pumping light can be evenly leaked towards the cladding when being transmitted by the tellurate glass fiber core with the anti-guiding refractive index, so that the rare earth ions in the multicomponent glass of the cladding are motivated, and upper energy level conversion light emitting can be achieved. White light can be given out by adjusting the intensity of the pumping light, the components of the rare earth ions and the doping content of the pumping light, the white light can be evenly output, and a comfortable and soft lighting effect is achieved.

Description

Conversion of white light fiber illumination device on a kind of multicomponent glass
Technical field
The present invention relates to a kind of fiber illumination device, particularly relate to and a kind ofly can excite the multicomponent tellurate glass up-conversion luminescence optical fiber of doping with rare-earth ions by long-distance transmissions pump light, belong to optical fibre illumination technical field.
Background technology
Lateral emitting optical fiber can be applied to the illumination needing the place of photodetachment such as inflammable, explosive, and this illumination is not by the interference of electromagnetism, the Code in Hazardous Special Locations that nuclear magnetic resonance, radar control room etc. have electromagnetic shielding requirements can also be applied to, can also carry out having personalized illumination in addition, as decoration, show exterior feature etc., therefore fiber illumination device has certain practical value.
Lateral emitting optical fiber be optical fiber itself as illuminator, a flexible striation can be formed.Because often kind of fiber optic materials all exists dispersion in various degree to transmission light, if directly transmit visible ray, what namely input is the white light of broad band, along with the transmission of optical fiber, will inevitably occur the change of color.Therefore, broad band multimode white light is transmitted in the general more difficult realization of this type optical fiber at a distance, is not also suitable for the Code in Hazardous Special Locations white-light illuminating needing high color rendering index (CRI).At present, what optical fibre illumination field was used is plastic optical fiber mostly.In the optical fiber of unlike material, the cost of manufacture of plastic optical fiber is the most cheap, often only has 1/10th of silica fibre cost of manufacture.But any type of ultraviolet, comprise daylight and all can cause the degraded of plastic optical fiber material and aging.Therefore, be necessary that development is a kind of to emit white light and not easily aging novel illumination optical fiber.Multicomponent glass optical fiber is exactly this type, and it can overcome the defect of plastic optical fiber, and the gain bandwidth had than silica fibre high several times and higher doping concentration of rare earth ion.
Typical lateral emitting optical fiber mainly contains two kinds: one has banded light scattering reflectance coating, and wherein light scattering reflectance coating is attached to along in a part for the core periphery in core length direction, but light diffusive reflective film has the low-transmittance caused by diffuse reflection usually; Another kind of have optical scatter in the clad of core periphery, and the light be transmitted into clad from fibre core is wrapped by a layer scattering, then leaks.But because the reasons such as environmental vibration easily make core/covering be separated at intersection genetic horizon, the area light scattering of separation reduces, thus can cause the appearance of so-called " dark defect ", causes the uneven luminescence of optical fiber.
That involved in the present invention take tellurate as matrix (TZN:TeO 2-ZnO-Na 2o) adulterate the multicomponent glass optical fiber of one or more rare earth ions, and its variations in refractive index scope is more quartzy much bigger, has higher transmitance at visible ray and near infrared band.And there is lower phonon energy due to multicomponent glass optical fiber, make some rare earth ions luminous efficiency in tellurate matrix very high.Therefore, the white light illumination device built based on the multicomponent glass optical fiber of tellurate host doped rare earth ion is expected to for Code in Hazardous Special Locations provides lighting source.
Summary of the invention
Technical problem: the object of this invention is to provide conversion of white light fiber illumination device on a kind of multicomponent glass, the pump light sent by 980nm laser instrument carries out upconversion luminescence to lateral emitting multicomponent glass optical fiber after optical fiber long-distance transmissions, realizes the white-light illuminating of high color rendering index (CRI).
Technical scheme: on multicomponent glass of the present invention, conversion of white light fiber illumination device comprises: 980nm pump laser, 980nm laser transmission fiber, fiber splitter, 3dB power splitter and multicomponent glass up-conversion luminescence optical fiber; Wherein, the pumping laser that 980nm laser instrument exports arrives illumination place, place fiber splitter after Transmission Fibers long-distance transmissions, each road output of optical splitter is by Transmission Fibers cascade 3dB power splitter, two outputs of each 3dB power splitter are coupled the two ends of one section of spiral-shaped multicomponent glass up-conversion luminescence optical fiber respectively, overall become array distribution in the output end face of optical splitter.
Described fiber splitter to divide equally way be 3 × n, n is natural number, overall become array-like distribution.
The every root length of described multicomponent glass up-conversion luminescence optical fiber is 1 ~ 1.5m, and be curled into the helical form annulus of 6-8 circle radius r=2 ~ 4cm, interval 0.5 ~ 1cm between ring and ring, two ends respectively stay 6 ~ 10cm and 3dB power splitter, two outputs directly to connect.
Described multicomponent glass up-conversion luminescence optical fiber comprises:
Clad material, the multicomponent glass that this clad material is take tellurate as one or more rare earth ions of matrix Uniform Doped is the centre of luminescence, the multicomponent glass of matrix that prepared with tellurate is by mole%, comprise following component: Na 2o content 12 ~ 16%, ZnO content 3 ~ 7%, TeO 2content 45 ~ 55%, PbO content 5 ~ 10%, GeO 2content 16 ~ 22%, ZnF 2content 3 ~ 7%, the summation of said components is 100%; Doping can upconversion luminescence be Yb 3+, Ho 3+, Tm 3+, Er 3+, Pr 3+one or more rare earth ions, doping ratio adjusts according to the brightness of required white light, colour temperature or colourity, realizes the output of tunable white, reaches the illumination of high color rendering index (CRI);
Core material, this core material is the tellurate multicomponent glass of refractive index a little less than covering;
Coated with buffer layer, uvioresistant flexible, anti-aging at the outer coated one deck again of multicomponent glass up-conversion luminescence fibre cladding and at visible light wave range without the transparent isolated material absorbed or transparent protection material;
The periphery of the coated described core material of clad material, and there is the refractive index slightly higher than fibre core, there is the pattern leakage losses factor, utilize refractive index inverse-guiding principle, namely light no longer occurs to be totally reflected at the less fibre core of refractive index and the larger clad interface place of refractive index and leaks into gradually in covering, thus the pump light transmitted in fibre core is evenly leaked in covering excite the multicomponent glass rare earth luminescence center in covering, carry out upconversion luminescence.
During described multicomponent glass up-conversion luminescence optical fiber corresponding wavelength λ=589.3nm, the refractive index n of fibre core 1be 1.860 ~ 1.876, the refractive index n of covering 2be 1.862 ~ 1.882, the refractive indices n=n of core/covering 2-n 1be 0.002 ~ 0.008, core diameter is 3.8 μm ~ 6.6 μm or 80 μm, and cladding diameter is 120 ~ 130 μm.
Beneficial effect: the present invention is based on conversion of white light fiber illumination device on a kind of multicomponent glass and there is following beneficial effect:
The 980nm pumping laser of long-distance transmissions is entered the lateral emitting multicomponent glass optical fiber two ends be in array-like arrangement by fiber splitter and coupling device, by regulating component and the doping content of pump light intensities, rare earth ion, improve the architecture of multicomponent glass in fibre core, rare earth ion 980nm pump light being excited adulterate in covering carries out upconversion and sends visible ray, realizes white-light illuminating.
Accompanying drawing explanation
Fig. 1 is the structural representation of a conversion of white light fiber illumination device luminescence unit on a kind of multicomponent glass of proposing of the present invention.
Fig. 2 is that on a kind of multicomponent glass of proposing of the present invention, conversion of white light fiber illumination device is the light source schematic diagram of 3 × 3 array-likes arrangements.
Fig. 3 is the enlarged diagram of lateral emitting multicomponent glass optical fiber in the structural representation of conversion of white light fiber illumination device on a kind of multicomponent glass.
Fig. 4 is comparing of changing with distance with common lateral emitting optical fiber luminous intensity of a kind of lateral emitting multicomponent glass optical fiber of proposing of the present invention.
Fig. 5 is the cross-sectional view of lateral emitting multicomponent glass optical fiber structure.
Fig. 6 is that rod-in-tube technique prepares lateral emitting optical fiber prefabricated rods schematic diagram.
Fig. 7 is the fluorogram of lateral emitting multicomponent glass optical fiber in embodiment.
Have in above accompanying drawing: the curve 7 that 980nm pump laser 1,980nm laser Optic transmission fiber 2, fiber splitter 3,3dB power splitter 4, multicomponent glass up-conversion luminescence optical fiber 5, luminescent panel 6, common lateral emitting optical fiber luminous intensity change with distance, the curve 8 of length variations of the present invention, armor coated A, covering B, fibre core C.
Detailed description of the invention
For making object of the present invention, technical scheme and beneficial outcomes clearly understand, below in conjunction with specific embodiment, and the present invention will be further described with reference to accompanying drawing, but do not limit the scope of the invention.In addition, although the invention provides the demonstration of the particular value comprising some parameter, should be appreciated that these parameters are without the need to definitely equaling corresponding value, but be approximately equal to corresponding value in certain error margin or design constraint.
The invention provides conversion of white light fiber illumination device on a kind of multicomponent glass, as shown in Figure 1, this device comprises one for providing laser instrument 1 and the Transmission Fibers 2 thereof of the 980nm of pump light, fiber splitter 3,3dB power splitter 4 and the multicomponent glass up-conversion luminescence optical fiber 5 be wound around in the shape of a spiral.Wherein: the light splitting way of fiber splitter 3 can be 3 × 3 nine tunnels as shown in Figure 2, also can be 3 × 40 two tunnels or other number, the equal cascade in each road 3dB power splitter 4, its two output links with multicomponent glass optical fiber 5 two ends be wound around in the shape of a spiral, overall one-tenth array distribution.Concrete lighting process is 980nm pumping laser 1 through Transmission Fibers 2 long-distance transmissions to illumination place, place fiber splitter 3, is divided into 1:1 two-way and exports, then be coupled into the two ends of the multicomponent glass optical fiber 5 be wound around in the shape of a spiral after light splitting by 3dB power splitter 4.Because the refractive index inverse-guiding of multicomponent glass optical fiber fibre core and covering designs, 980nm pump light is revealed on fibre core inner edge transmission limit, and the 980nm pump light causing the rare earth ion adulterated in covering to be revealed excites and realizes upconversion luminescence.By regulating incident pump luminous intensity and multicomponent glass optical fiber length, control pump light by fibre core to the stable mild leakage of covering, multicomponent glass optical fiber uniformly light-emitting within the scope of certain length can be realized, and luminous intensity continuous tuning within the specific limits, each optical fiber luminescent unit is arranged as shown in Figure 2 and finally can realize array illumination.
Fig. 3 is the structural representation of multicomponent glass optical fiber in the present embodiment, fibre core and the anti-ballistic principle of drawing of cladding index is utilized to make light in fibre core and clad interface no longer experiences total internal reflection, and make the 980nm pump light transmitted in fibre core leak in covering, thus excite the rare earth luminous ionoluminescence of adulterating in covering.Because pumping plain edge transmission limit is revealed, along with the increase pump light intensities of transmission range and fiber lengths decays gradually, cause the luminous intensity of multicomponent glass optical fiber also to decline thereupon.Therefore, for realizing the luminescence that in each luminescence unit, multicomponent glass optical fiber is uniform and stable, the luminous intensity of multicomponent glass optical fiber need be regulated by the control transmission range of pump light and the length of optical fiber.Excite the relation curve of lower luminous intensity and fiber lengths according to multicomponent glass optical fiber as shown in Figure 4 at pump light, choose the length about 1 ~ 1.5m of multicomponent glass optical fiber in each luminescence unit.And occur that luminous intensity declines this defect in order to make up with fiber lengths increase, the multicomponent glass optical fiber that this 1 ~ 1.5m is long is curled into the helical form annulus that 6-8 circle diameter is 4cm, annulus opposite ends and 3dB power splitter two outputs are connected, take subtend pumping, thus can guarantee that each multicomponent glass optical fiber luminescence unit is even, stabilized illumination.
In addition, the multicomponent glass related in the present invention and the present embodiment and lighting fiber thereof, prepared by following methods: first, by mole% the multicomponent glass optical fiber coverstock Na taking 14%, 5%, 50%, 7%, 19% and 5% respectively 2o, ZnO, TeO 2, PbO, GeO 2and ZnF 2200g, takes the rare-earth compound Yb of 0.4%, 0.4% and 1.6% by weight percentage respectively altogether 2o 3, Ho 2o 3and Tm 2o 3.Then, after raw material is mixed, pouring silica crucible successively into is placed in the Elema high temperature furnace of 1000 DEG C, 1 hour is founded after stirring, clarification, homogenizing glass metal, be poured into again be preheated to about 260 DEG C copper coin on, treat that glass solidification is placed in 360 DEG C of Muffle furnaces and carry out fine annealing, be down to room temperature through 10 hours.Finally, select bubble-free, homogeneous glass that striped is good is processed into cladding glass rod.When making optical fiber core material, on the basis of cladding glass material prescription, fine setting glass ingredient makes fibre core and cladding glass material have close glass transition temperature, transition temperature, thermal coefficient of expansion and dispersion characteristics etc.The preparation technology using for reference cladding glass obtains glass of fiber core material, obtains Circular glass rod after polishing.By the cladding glass bastinade hole prepared, its aperture is slightly larger than fibre core Circular glass rod outside diameter, utilize rod-in-tube technique as shown in Figure 5 can obtain lateral emitting optical fiber prefabricated rods, then be placed on wire-drawer-tower fixed position place, operation wire-drawer-tower control temperature obtains lateral emitting optical fiber in 425 DEG C of wire drawings.As shown in Figure 6, wherein A is armor coated, and B is the multicomponent glass covering of doping with rare-earth ions, and C is multicomponent glass fibre core, and corresponding cladding index is n in the end face structure signal of gained optical fiber 2=1.872, fiber core refractive index is n 1=1.868.
Covering bulk is under the 980nm pump light of 2.5W excites after tested, its illumination is 140Lux (2cm place), stronger fluorescence intensity is had under the exciting of pump light, and luminescence is softer, by the test to the multicomponent glass up-conversion luminescence fiber spectrum performance made, obtain the fluorescence spectrum figure under 980nm laser pump (ing) as shown in Figure 7.As seen from the figure, red, green, blue three fluorescence peak centre wavelengths lay respectively at 660nm, 546nm and 475nm place, and corresponding CIE chromaticity coordinates is (0.42,0.43), is in white light field.

Claims (5)

1. a conversion of white light fiber illumination device on multicomponent glass, is characterized in that this device comprises: 980nm pump laser (1), 980nm laser transmission fiber (2), fiber splitter (3), 3dB power splitter (4) and multicomponent glass up-conversion luminescence optical fiber (5); Wherein, the laser that 980nm pump laser (1) exports enters fiber splitter (3) through Transmission Fibers (2), each road output of fiber splitter (3) is by Transmission Fibers (2) cascade 3dB power splitter (4), two outputs of each 3dB power splitter (4) are coupled the two ends of one section of multicomponent glass up-conversion luminescence optical fiber (5) respectively, overall become array distribution in the output end face of fiber splitter (3).
2. conversion of white light fiber illumination device on a kind of multicomponent glass according to right 1, it is characterized in that described fiber splitter (3) to divide equally way be 3 × n, n is natural number, overall become array-like distribution.
3. conversion of white light fiber illumination device on a kind of multicomponent glass according to right 1, it is characterized in that the every root length of described multicomponent glass up-conversion luminescence optical fiber (5) is 1 ~ 1.5m, be curled into the helical form annulus of 6-8 circle radius r=2 ~ 4cm, interval 0.5 ~ 1cm between ring and ring, two ends respectively stay 6 ~ 10cm and 3dB power splitter (4) two outputs directly to connect.
4. conversion of white light fiber illumination device on a kind of multicomponent glass according to right 1, is characterized in that described multicomponent glass up-conversion luminescence optical fiber (5) comprising:
Clad material, the multicomponent glass that this clad material is take tellurate as one or more rare earth ions of matrix Uniform Doped is the centre of luminescence, the multicomponent glass of matrix that prepared with tellurate is by mole%, comprise following component: Na 2o content 12 ~ 16%, ZnO content 3 ~ 7%, TeO 2content 45 ~ 55%, PbO content 5 ~ 10%, GeO 2content 16 ~ 22%, ZnF 2content 3 ~ 7%, the summation of said components is 100%; Doping can upconversion luminescence be Yb 3+, Ho 3+, Tm 3+, Er 3+, Pr 3+one or more rare earth ions, doping ratio adjusts according to the brightness of required white light, colour temperature or colourity, realizes the output of tunable white, reaches the illumination of high color rendering index (CRI);
Core material, this core material is the tellurate multicomponent glass of refractive index a little less than covering;
Coated with buffer layer, uvioresistant flexible, anti-aging at multicomponent glass up-conversion luminescence fibre cladding outer cladding one deck and at visible light wave range without the transparent isolated material absorbed or transparent protection material;
Clad material is coated on the periphery of described core material, and there is the refractive index slightly higher than fibre core, there is the pattern leakage losses factor, utilize refractive index inverse-guiding principle, namely light no longer occurs to be totally reflected at the less fibre core of refractive index and the larger clad interface place of refractive index and leaks into gradually in covering, thus make the pump light transmitted in fibre core leak in covering the multicomponent glass rare earth luminescence center excited in covering gradually equably, carry out upconversion luminescence.
5. conversion of white light fiber illumination device on a kind of multicomponent glass according to right 1, when it is characterized in that described multicomponent glass up-conversion luminescence optical fiber (5) corresponding wavelength λ=589.3nm, the refractive index n of fibre core 1be 1.860 ~ 1.876, the refractive index n of covering 2be 1.862 ~ 1.882, the refringence △ n=n of core, covering 2-n 1between 0.002 ~ 0.008, core diameter is 3.8 μm ~ 6.6 μm or 80 μm, and cladding diameter is 120-130 μm.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113586993A (en) * 2021-07-08 2021-11-02 苏州宇慕汽车科技有限公司 Vehicle-mounted atmosphere lamp based on LED light source
EP4142072A4 (en) * 2020-04-24 2024-02-21 Panasonic Ip Man Co Ltd Luminescent system
CN117666013A (en) * 2024-01-31 2024-03-08 创昇光电科技(苏州)有限公司 Side-emitting glass optical fiber

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Publication number Priority date Publication date Assignee Title
EP4142072A4 (en) * 2020-04-24 2024-02-21 Panasonic Ip Man Co Ltd Luminescent system
CN113586993A (en) * 2021-07-08 2021-11-02 苏州宇慕汽车科技有限公司 Vehicle-mounted atmosphere lamp based on LED light source
CN117666013A (en) * 2024-01-31 2024-03-08 创昇光电科技(苏州)有限公司 Side-emitting glass optical fiber

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