共查询到20条相似文献,搜索用时 20 毫秒
1.
研究一种新型无热化阵列波导光栅,这是由聚合物组成的一种新型阵列波导光栅。阵列波导光栅对温度的依赖性受波导物质的折射率、热膨胀系数和波导芯的尺寸影响,所以,通过调节这些参数就可以减小温度对阵列波导光栅的影响。优化得到全聚合物型阵列波导光栅在温度20℃~70℃范围内波谱漂移小于常规型AWG结构的0.5%。 相似文献
2.
A novel method for fabricating an athermal AWG is proposed, using a unique apparatus for ITU-T center wavelength adjustment and optical coupling of two cut-parts. UV adhesive or sticky gel is applied into the gap between the cut-elements and the alignment base substrate by capillary infiltration. The spectrum profiles are almost the same as those of the original chip state, and no deterioration is observed resulting from athermalization. Flat-top athermal AWG modules of 100 GHz×40 ch are fabricated. Over a temperature range of-40 to 85℃, the center wavelength shift is±22 pm, and the insertion loss change is less than ±0.11 dB. 相似文献
3.
We demonstrate a new fabrication method for adjusting the temperature dependence of a polymeric arrayed‐waveguide grating (AWG) on a Si substrate. A temperature‐dependent wavelength shift of ?0.1 nm/°C in a polymeric AWG on a Si substrate is reduced to +0.01 nm/°C by detaching part of the polymer film, including the grating channel region of the AWG, from the Si substrate while the other parts remain fixed on the substrate. 相似文献
4.
Kamei S. Inoue Y. Mizuno T. Shibata T. Kaneko A. Takahashi H. Iemura K. 《Electronics letters》2005,41(9):544-546
A silica-based 1.5%-/spl Delta/ 100 GHz-spacing 32-channel athermal arrayed-waveguide grating (AWG) with compact size and extremely low insertion loss is described. By reducing the fibre coupling loss and the excess loss in a silicone-filled groove, an insertion loss of 1.3 dB was achieved with this athermal AWG. 相似文献
5.
Described is a silica-based athermal 100 GHz-spacing 40-channel arrayed waveguide grating (AWG) with a Mach-Zehnder interferometer (MZI)-synchronised configuration that employs resin-filled grooves in the AWG and MZI. By suppressing the groove excess loss and using 1.5%-Delta waveguides, a low insertion loss of 3.2 dB and a wide 0.5 dB bandwidth of 45.9 GHz with athermal operation in the -5 to 65degC range and a compact chip size were achieved. 相似文献
6.
S. Kamei K. Iemura A. Kaneko Y. Inoue T. Shibata H. Takahashi A. Sugita 《Photonics Technology Letters, IEEE》2005,17(3):588-590
We describe a compact 1.5%-/spl Delta/ athermal silica-based 100-GHz-spacing 16-channel arrayed-waveguide grating (AWG) multi/demultiplexer with a modified groove design for a very low excess loss. We propose new approaches for modifying the shape of the grooves and the arrayed waveguides and optimize the shape modifications for 1.5%-/spl Delta/ waveguides. By employing this modified groove design, we greatly reduced the groove excess loss from 1.9 to 0.4 dB in the 1.5%-/spl Delta/ athermal AWG. 相似文献
7.
Reducing the thermal dependence of silica-based arrayed-waveguide grating using inorganic-organic hybrid materials 总被引:1,自引:0,他引:1
Eun-Seok Kang Woo-Soo Kim Duk-Jun Kim Byeong-Soo Bae 《Photonics Technology Letters, IEEE》2004,16(12):2625-2627
This study demonstrates the application of a temperature-independent arrayed-waveguide grating (AWG) using a simple hybrid waveguide structure composed of silica core/inorganic-organic hybrid material overcladding layer. The thermooptic effect of the hybrid materials varies over a wide range of temperature and provides athermal characteristics in an AWG. The temperature dependence of the AWG was reduced through the precision control of the thermooptic coefficient of the hybrid materials (/spl Delta//spl lambda/=/spl sim/3pm//spl deg/C). 相似文献
8.
A patterned soft elastomeric substrate is utilized for fabricating an all-polymer thin film transistor (TFT). With a polymer solution for the source/drain electrodes, it is difficult to form a well defined narrow channel. The problem is resolved with the aid of a micromolding technique and the patterned substrate. When the all polymer TFT is subjected to bending, the polymer gate dielectric is the layer that experiences the most stress. This stress problem, which can lead to device failure, can be relieved to an extent by introducing a small fraction of ethyl cellulose to the polymer dielectric. The effects of the ethyl cellulose content on the device performance are not significant. 相似文献
9.
Athermal silica-based arrayed-waveguide grating (AWG)multi/demultiplexers with new low loss groove design 总被引:6,自引:0,他引:6
A new low loss groove design for athermal silica-based AWG multi/demultiplexers is proposed. The insertion loss was <3.2 dB with an excess loss of 0.4 dB. The temperature dependence of the channel wavelength change was suppressed to be below 2.5 GHz in the 0-85°C range 相似文献
10.
Maru K. Matsui K. Ishikawa H. Abe Y. Kashimura S. Himi S. Uetsuka H. 《Electronics letters》2004,40(6):374-375
A small and low-loss athermal AWG is demonstrated based on super-high-/spl Delta/ waveguides. Resin-filled trenches are formed in the slab region to compensate for the temperature-dependent wavelength shift. Small wavelength shift of 0.03 nm is achieved for the temperature range 0-65/spl deg/C with almost no spectral degradation. 相似文献
11.
《Photonics Technology Letters, IEEE》2009,21(22):1695-1697
12.
Qian Wang Fengzhe Cui Mengzhen Sha Chao Zhang Xunfan Liao Hang Yin Xiaotao Hao 《Advanced functional materials》2023,33(42):2304169
With the progressive development of photomultiplication-type organic photodetectors (PM-OPDs), increasing research efforts are devoted to all-polymer PM-OPDs due to their potential in terms of device stability and stretchability. However, poor polymer-polymer miscibility and entanglement of long polymer chains are still the main challenges to form desirable active layer morphology in such systems. A smooth solidification process is favorable toward realizing a morphology that features ordered molecular orientation and high crystallinity. Herein, morphological control issue in all-polymer PM-OPDs is addressed by modifying film formation kinetics with an insulating polymer blending strategy. The prolonged crystallization process of polystyrene-blended films can form high-ordered molecular arrangements and crystallinity in donor/acceptor phases, leading to improved charge transport properties and suppressed trap states. With boosting the trap-assisted photomultiplication effect, the polystyrene-blended all-polymer PM-OPD with a high specific detectivity of 4.0 × 1013 Jones can be achieved due to the accumulation of enhanced photogenerated electrons at the interface and the efficient injection of external holes, which is one of the best detectivity values reported for PM-OPDs. This study not only reveals valuable insights into the effects of insulating polymers on the film formation kinetics mechanism, but also provides novel strategy to fabricate high-performance all-polymer PM-OPDs. 相似文献
13.
《Photonics Technology Letters, IEEE》2009,21(17):1205-1207
14.
Kui Feng Ziang Wu Mengyao Su Suxiang Ma Yongqiang Shi Kun Yang Yang Wang Yujie Zhang Weipeng Sun Xing Cheng Limin Huang Jie Min Han Young Woo Xugang Guo 《Advanced functional materials》2021,31(5):2008494
Developing organic solar cells (OSCs) based on a ternary active layer is one of the most effective approaches to maximize light harvesting and improve their photovoltaic performance. However, this strategy meets very limited success in all-polymer solar cells (all-PSCs) due to the scarcity of narrow bandgap polymer acceptors and the challenge of morphology optimization. In fact, the power conversion efficiencies (PCEs) of ternary all-PSCs even lag behind binary all-PSCs. Herein, highly efficient ternary all-PSCs are realized based on an ultranarrow bandgap (ultra-NBG) polymer acceptor DCNBT-TPC, a medium bandgap polymer donor PTB7-Th, and a wide bandgap polymer donor PBDB-T. The optimized ternary all-PSCs yield an excellent PCE of 12.1% with a remarkable short-circuit current density of 21.9 mA cm−2. In fact, this PCE is the highest value reported for ternary all-PSCs and is much higher than those of the corresponding binary all-PSCs. Moreover, the optimized ternary all-PSCs show a photostability with ≈ 68% of the initial PCE retained after 400 h illumination, which is more stable than the binary all-PSCs. This work demonstrates that the utilization of a ternary all-polymer system based on ultra-NBG polymer acceptor blended with compatible polymer donors is an effective strategy to advance the field of all-PSCs. 相似文献
15.
1 IntroductionTheArrayedWaveguideGrating(AWG)multi plexerisanimportantopticaldeviceforWavelengthDivisionMultiplexing (WDM )inopticaltelecom municationsystems[1~ 5] .Thisdevicecanoffersomebasicfunctionsincludingmultiplexing/demultiplex ing ,add/dropmultiplexingandN×Ninterconnec tion.Also,itpossessessomeadvantages,suchasnarrowerwavelengthspacing ,moresignalchannels,lowercrosstalkandsmootherpassbands.AWGmul tiplexers[6~1 0 ] havebeenfabricatedusingsilicas,InPandpolymers.Amongthem ,apo… 相似文献
16.
通过减少奇数阵列波导的芯宽度,同时增加偶数阵列波导的芯宽度的技术,构造了箱型光谱. 选用氟化聚芳醚FPE聚合物材料,设计并制备了17×17信道箱型光谱响应阵列波导光栅(AWG)波分复用器. 测试结果表明,器件的中心波长为1550.87nm,波长间隔为0.8nm, 3dB带宽约为0.476nm,串扰低于-21dB,插入损耗为13~15dB. 相似文献
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18.
通过减少奇数阵列波导的芯宽度,同时增加偶数阵列波导的芯宽度的技术,构造了箱型光谱-选用氟化聚芳醚FPE聚合物材料,设计并制备了17×17信道箱型光谱响应阵列波导光栅(AWG)波分复用器.测试结果表明,器件的中心波长为1550.87nm,波长间隔为0.8nm,3dB带宽约为0.476nm,串扰低于-21dB,插入损耗为13~15dB. 相似文献
19.
The weak donor-strong acceptor polymer acceptors for all-polymer solar cells (all-PSCs) have gained much less attention compared with the typical donor-strong acceptor counterparts. Direct (hetero)arylation polymerization reaction is a rising synthetic method, although most of the naphthalene diimide polymer photovoltaic acceptors have been prepared by classic Stille polymerization. A weak donor-strong acceptor polymer acceptor PNB2F has been successfully designed and synthesized by the two-step direct (hetero)arylation reaction and further applied in all-PSCs. The all-PSC device based on PNB2F and electron-donating polymer PBDB-T gained a PCE of 4.49%. The results demonstrate that direct (hetero)arylation reaction is a promising tool for building efficient polymer acceptors with convenient and low-cost synthesis ideas. 相似文献