CN202394002U - Bielectrode temperature tuning polymer waveguide Bragg double-sided grating filter - Google Patents
Bielectrode temperature tuning polymer waveguide Bragg double-sided grating filter Download PDFInfo
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- CN202394002U CN202394002U CN2011205251510U CN201120525151U CN202394002U CN 202394002 U CN202394002 U CN 202394002U CN 2011205251510 U CN2011205251510 U CN 2011205251510U CN 201120525151 U CN201120525151 U CN 201120525151U CN 202394002 U CN202394002 U CN 202394002U
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Abstract
The utility model discloses a bielectrode temperature tuning polymer waveguide Bragg double-sided grating filter which comprises a constant temperature plate, a silicon substrate, a lower coating, a lower electrode, a waveguide double-sided grating, an upper coating and an upper electrode, wherein the constant temperature plate, the silicon substrate, the lower coating, the lower electrode, the waveguide double-sided grating, the upper coating and the upper electrode are sequentially laminated from bottom to top; both the lower electrode and the upper electrode are provided with electrode leads and connected with a current source through the electrode leads to form a warming device; and the waveguide double-sided grating comprises a lower grating, a straight waveguide and an upper grating and is formed by sequentially laminating the lower grating, the straight waveguide and the upper grating from bottom to top. The grating structures are etched on the two sides of the waveguide double-sided grating, so as to correspondingly increase the difference in effective refractive index of periodic waveguide as well as the reflective index. Besides, the tuning speed is increased and the reflectance spectrum parameters are more stable. The bielectrode temperature tuning polymer waveguide Bragg double-sided grating filter has good reflecting and tuning effects, can be used for effectively reducing the length of the grating, and is favorable to device integration.
Description
Technical field
The utility model belongs to fiber grating components and parts field, relates in particular to relate to thermo-optical tunability polymer waveguide Bragg grating design and fabrication technology.
Background technology
The waveguide optical grating wave filter is the Primary Component in the wavelength-division multiplex system.Along with the continuous development of technology, integrated waveguide optical grating has been widely used in waveguide input/output coupler, beam splitter, wave filter, sensor etc.Organic polymer because have low, thermally-stabilised and high, the high thermo-optical coeffecient of reliability of loss and low-thermal conductivity, compatible good, cheap, be easy to advantages such as integrated.At present, organic polymer becomes important materials in the integrated optics gradually.Can make designs and be manufactured with bigger dirigibility with organic polymer material.The polymeric material thermo-optic effect is apparent in view simultaneously, is fit to preparation polymeric thermo-optic tuned light gate device.
Problems such as conventional temperature tuned light gate device has only single grating and unitary electrode, owing to receive the restriction of structure, exists reflectance peak not high, and grating length is long, the thermo-optical tunability scope is little, modulation rate is low have influenced the overall performance of device
The utility model content
Utility model purpose: to the problem and shortage of above-mentioned existing existence; The utility model provides interior effective refractive index difference of a kind of cycle bigger; Reflectivity is bigger; Bipolar electrode carries out the two-sided grating filter of bipolar electrode thermal tuning polymer waveguide Bragg of the control of electric current simultaneously, makes its tuning speed faster.The reflectance spectrum parameter is more stable.
Technical scheme: for realizing above-mentioned utility model purpose; The utility model adopts following technical scheme: the two-sided grating filter of a kind of bipolar electrode thermal tuning polymer waveguide Bragg; Comprise temperature-constant plate, silicon substrate, under-clad layer, bottom electrode, the two-sided grating of waveguide, top covering and top electrode, said temperature-constant plate, silicon substrate, under-clad layer, bottom electrode, the two-sided grating of waveguide, top covering and top electrode are superimposed together from the bottom up successively; Said bottom electrode and top electrode are equipped with contact conductor, and connect to form heat riser through this contact conductor and current source; The two-sided grating of said waveguide comprises down grating, straight wave guide and last grating, and by said time grating, straight wave guide with last grating is superimposed successively from bottom to up constitutes.
The utility model all is carved with optical grating construction in the two-sided grating of waveguide both sides,, thus the difference of cycle waveguide effective refractive index can be increased thereupon, and reflectivity also can increase.Wave filter when work current source output current makes the two-sided grating of waveguide both sides top electrode and bottom electrode produce heat simultaneously it to be carried out thermal tuning, can make tuning speed faster, and reflection parameters is more stable.
As preferably, the material thermo-optical coeffecient of said under-clad layer, top covering and the two-sided grating of waveguide is a negative.The two-sided grating material of waveguide is chosen as the bigger polymeric material of thermo-optical coeffecient, and two electrodes are selected the heating electrode of Current Control for use up and down.Can adjust the variation of wave-guide grating structure effective refractive index through injection current, then resonance wavelength can change thereupon.Realize the function of wavelength thermal tuning.
As preferably, the two-sided grating material of said waveguide adopts the ultraviolet light polymerization organic polymer, and the hot light characteristic of this organic polymer is-1.8 * 10
-4/ ℃
Beneficial effect: compared with prior art, the utlity model has following advantage: all be carved with optical grating construction in the two-sided grating of waveguide both sides, thereby the difference of cycle waveguide effective refractive index can be increased thereupon, reflectivity also can increase; Bipolar electrode carries out the control of electric current simultaneously, can be so that tuning speed to be faster, and the reflectance spectrum parameter is more stable, realizes well reflection, tuning effect, can effectively reduce the length of grating, accomplishes to be beneficial to the integrated effect of device.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the reflectivity thermal tuning contrast of the utility model embodiment and conventional waveguide grating filter;
Fig. 3 is the bandwidth thermal tuning contrast of the utility model embodiment and conventional waveguide grating filter;
Fig. 4 is the wavelength thermal tuning contrast of the utility model embodiment and conventional waveguide grating filter.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment; Further illustrate the utility model; Should understand these embodiment only be used to the utility model is described and be not used in the restriction the utility model scope; After having read the utility model, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the utility model.
As shown in Figure 1, the two-sided grating filter of a kind of bipolar electrode thermal tuning polymer waveguide Bragg is superimposed together temperature-constant plate 1, silicon substrate 2, under-clad layer 3, bottom electrode 4, the two-sided grating of waveguide, top covering 5 and top electrode 6 from the bottom up successively; Extraction electrode lead-in wire 10 on said bottom electrode 4 and top electrode 6; And connect to form the heat riser of heating usefulness through this contact conductor 10 and current source 11; Simultaneously the two-sided grating of above-mentioned waveguide comprises grating 7, straight wave guide 8 and last grating 9 down, and by grating 7, straight wave guide 8 under said with last grating 9 is superimposed successively from bottom to up constitutes.Under the room temperature, light transmits central wavelength lambda in the two-sided grating of waveguide
B=2n
EffΛ, three dB bandwidth
Reflectivity
Ripple be reflected n wherein
EffBe the waveguide effective refractive index, Λ is the grating cycle, and Δ n representes the mean change of effective refractive index in the one-period, and L is a grating length.
To wavelength expression formula both sides differential: Δ λ
B=2 Δ n
EffΛ+2n
EffΔ Λ (1)
Both sides are than last λ
B,
Make K
T=ξ+α, then
The two-sided grating of said waveguide adopts the device of negative thermo-optical coeffecient material.During current source 11 work, electric current passes to top electrode 6 through contact conductor 10 and produces heat with bottom electrode 4, and heat transmits to waveguide grating device from electrode, and the waveguide optical grating temperature raises, K
TFor negative, resonance wavelength raises with temperature and reduces.
Owing to the part ionization electrode that the high part of waveguide in the two-sided grating of waveguide is low than waveguide is near, suffered temperature effect is big, and the effective refractive index intensity of variation is big, and Δ n can raise with temperature and reduce to tend towards stability gradually (though n
EffAlso reduce, its reciprocal increasing, but the influence that is produced is less than Δ n, so mainly see Δ n influence), then reflectivity and bandwidth can raise with temperature and reduce.Continuously change electric current, just can realize the function of wavelength continuous tuning.Select commercial organic polymer ultra-violet curing ZPU series material for use, the hot light characteristic K of this material
T=-1.8 * 10
-4/ ℃, confirm that design parameter is as shown in table 1.
The two-sided grating design parameter of table 1 thermal tuning waveguide
| Design parameters | Title | Value of consult volume |
| λ 0 | Room temperature centre wavelength | 1555nm |
| N cla | Cladding index | 1.44 |
| N cor | The sandwich layer refractive index | 1.46 |
| Λ | The grating cycle | 0.535μm |
| L | Grating length | 6mm |
| Th u | Top covering 5 thickness | 3μm |
| Th d | Under- |
9μm |
| High | Duct height | 6μm |
| Width | Duct width | 6μm |
| High g | The grating height | 0.6μm |
| Width ele | Electrode width | 8μm |
| Δλ | Wavelength tuning range | 10nm |
The reflectivity of present embodiment and conventional waveguide grating filter structure, bandwidth, wavelength thermal tuning contrast situation are shown in Fig. 2～4.Present embodiment structure reflectivity is between 43.47-42.60dB in the tuning range, and the traditional structure reflectivity that utilizes parameter designing such as identical waveguide length, width to go out is merely 12.90-21.31dB, and new construction is far above the traditional raster structure; Though slightly higher between the bandwidth 0.554nm-0.542nm of present embodiment than traditional structure, can satisfy the requirement of wave filter to bandwidth characteristic; Present embodiment reflectivity, bandwidth parameter are more stable in tuning range.In 0-60 ℃ of scope of temperature rising, traditional structure wavelength tuning 7.01nm, tuning speed-0.1168nm/ ℃; And present embodiment tuning range 10.4nm; Tuning speed-0.1733nm/ ℃, wavelength tuning speed ratio traditional structure is fast, and the tunable wave length scope is bigger during the rising uniform temp.
Claims (3)
1. two-sided grating filter of bipolar electrode thermal tuning polymer waveguide Bragg; It is characterized in that: comprise temperature-constant plate (1), silicon substrate (2), under-clad layer (3), bottom electrode (4), the two-sided grating of waveguide, top covering (5) and top electrode (6), said temperature-constant plate (1), silicon substrate (2), under-clad layer (3), bottom electrode (4), the two-sided grating of waveguide, top covering (5) and top electrode (6) are superimposed together from the bottom up successively; Said bottom electrode (4) and top electrode (6) are equipped with contact conductor (10), and connect to form heat riser through this contact conductor (10) and current source (11); The two-sided grating of said waveguide comprises grating (7), straight wave guide (8) and last grating (9) down, and by said grating (7), straight wave guide (8) and the superimposed successively from bottom to up formation of last grating (9) down.
2. according to the two-sided grating filter of the said bipolar electrode thermal tuning of claim 1 polymer waveguide Bragg, it is characterized in that: the material thermo-optical coeffecient of said under-clad layer, top covering (5) and the two-sided grating of waveguide is a negative.
3. according to the two-sided grating filter of the said bipolar electrode thermal tuning of claim 1 polymer waveguide Bragg, it is characterized in that: the two-sided grating material of said waveguide adopts the ultraviolet light polymerization organic polymer, and the hot light characteristic of this organic polymer is-1.8 * 10
-4/ ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205251510U CN202394002U (en) | 2011-12-14 | 2011-12-14 | Bielectrode temperature tuning polymer waveguide Bragg double-sided grating filter |
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| CN2011205251510U CN202394002U (en) | 2011-12-14 | 2011-12-14 | Bielectrode temperature tuning polymer waveguide Bragg double-sided grating filter |
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| CN202394002U true CN202394002U (en) | 2012-08-22 |
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| CN2011205251510U Expired - Fee Related CN202394002U (en) | 2011-12-14 | 2011-12-14 | Bielectrode temperature tuning polymer waveguide Bragg double-sided grating filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914881A (en) * | 2011-12-14 | 2013-02-06 | 东南大学 | Polymer waveguide Bragg double-faced grating filter capable of double-electrode temperature tuning |
| CN107249868A (en) * | 2015-02-09 | 2017-10-13 | 微软技术许可有限责任公司 | Molding process and device for moulding optical module and optical module |
-
2011
- 2011-12-14 CN CN2011205251510U patent/CN202394002U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914881A (en) * | 2011-12-14 | 2013-02-06 | 东南大学 | Polymer waveguide Bragg double-faced grating filter capable of double-electrode temperature tuning |
| CN102914881B (en) * | 2011-12-14 | 2015-08-26 | 东南大学 | Bipolar electrode thermal tuning polymer waveguide Bragg dual light grating filter |
| CN107249868A (en) * | 2015-02-09 | 2017-10-13 | 微软技术许可有限责任公司 | Molding process and device for moulding optical module and optical module |
| CN107249868B (en) * | 2015-02-09 | 2020-05-05 | 微软技术许可有限责任公司 | Molding process and apparatus for molding optical assemblies and optical assemblies |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20131214 |