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| 2. |
- Dai, Daoxin, et al.
(författare)
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Deeply etched SiO2 ridge waveguide for sharp bends
- 2006
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Ingår i: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 24:12, s. 5019-5024
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Tidskriftsartikel (refereegranskat)abstract
- A deeply etched SiO2 ridge waveguide including the buffer, core, and cladding is presented for realizing sharp bends. The present SiO2 ridge waveguide has a strong confinement at the lateral direction, while it has a weak confinement at the vertical direction. Due to the strong confinement, a sharp bend (with a very small bending radius of about 10 mu m) is obtained for an acceptable bending loss. A detailed analysis of the loss in a bent waveguide is given by using a finite-difference method. In order to reduce the transition loss, a narrow bending section with an optimal lateral offset is used. A low leakage loss is obtained by using wide straight waveguides, and linear tapers are used to connect the wide straight section and narrow bent sections.
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| 5. |
- Khan, Salman Naeem, et al.
(författare)
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Optimal design for a flat-top AWG demultiplexer by using a fast calculation method based on a Gaussian beam approximation
- 2006
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Ingår i: Optics Communications. - : Elsevier BV. - 0030-4018 .- 1873-0310. ; 262:2, s. 175-179
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Tidskriftsartikel (refereegranskat)abstract
- Passband broadening of an AWG (array waveguide grating) demultiplexer with an MMI (multimode interference) coupler connected at the end of a tapered input waveguide is considered. An explicit formula based on the field propagation of an approximate Hermit-Gaussian beam is used to calculate quickly and reliably the spectral response of the AWG demultiplexer. The widths of the input waveguide, the output waveguides and the MMI coupler are optimized. The optimal design is verified with the experimental measurement.
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| 6. |
- Liu, Liu, et al.
(författare)
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Compact Arrayed Waveguide Grating Demultiplexers Based on Amorphous Silicon Nanowires
- 2006
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Ingår i: Integrated Photonics Research and Applications/Nanophotonics 2006, NWB5,April 24–28, 2006, Uncasville, Connecticut, USA..
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Konferensbidrag (refereegranskat)abstract
- A novel and flexible technology for ultra compact AWGs based on amorphous silicon nanowires is presented. A 4×4 AWG with a total dimension of 50×50µm was fabricated. 11nm channel spacing and -10dB crosstalk was obtained.
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| 7. |
- Liu, Liu, et al.
(författare)
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Highly integrated planar lightwave circuits based on plasmonic and Si nano-waveguides
- 2006
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Ingår i: Passive Components and Fiber-Based Devices III, Pts 1 and 2. - BELLINGHAM, WA : SPIE-INT SOC OPTICAL ENGINEERING. - 0819464465 ; , s. U765-U779
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Konferensbidrag (refereegranskat)abstract
- Planar lightwave circuits (PLC) based on nanophotonic waveguides are becoming more and more attractive because of their ultrasmall sizes and possibility for realizing large scale monolithic integration with a very high integration density. In this paper we discuss two attractive types of nanophotonic waveguides based on dielectrics or metals. For the dielectric type, a silicon-on-insulator (SOI) strip waveguide is considered, and ultra-compact photonic integrated devices such as polarization-insensitive arrayed waveguide grating (de)multiplexers are obtained. Based on the fact that light can be confined tightly in a single interface between a metal and dielectric, a surface plasmon (SP) waveguide can offer a tight confinement for the light field. The cross-sectional size of an SP waveguide could be pushed down to tens of nanometers, i.e. beyond the diffraction limit. An accurate anaylysis for an SP waveguide formed by a dielectric nano-trench in a metal is presented. A novel subwavelength index-guided multimode plasmonic waveguide is introduced and an ultra-compact MMI power splitter is designed.
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| 8. |
- Shi, Yaocheng, et al.
(författare)
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Novel ultracompact triplexer based on photonic crystal waveguides
- 2006
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Ingår i: IEEE Photonics Technology Letters. - : Institute of Electrical and Electronics Engineers (IEEE). - 1041-1135 .- 1941-0174. ; 18:21-24, s. 2293-2295
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Tidskriftsartikel (refereegranskat)abstract
- Two stages of directional couplers based on photonic crystal waveguides Are cascaded to form an ultracompact triplexer. The directional couplers are decoupled at the wavelength of 1310 rum. The length of the coupling region in the first directional coupler is chosen to separate the other two wavelengths (i.e., 1490 and 1550 nm), and the coupling region is tapered to improve the extinction ratios. The second directional coupler separates the wavelengths of 1490 and 1310 run. For the channel of 1550 nm, an additional directional coupler is used to reduce the crosstalk from the channels of 1490 and 1310 nm. The total size of the present triplexer is only 50 mu m x 20 mu m, and the good performance is verified with finite-difference time-domain simulation.
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| 9. |
- Thylén, Lars, et al.
(författare)
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Moore’s law for photonic integrated circuits
- 2006
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Ingår i: JZUS-A - Journal of Zhejiang University. Science. - 1009-3095. ; 7:12, s. 1961-1967
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Tidskriftsartikel (refereegranskat)abstract
- We formulate a “Moore’s law” for photonic integrated circuits (PICs) and their spatial integration density using twomethods. One is decomposing the integrated photonics devices of diverse types into equivalent basic elements, which makes acomparison with the generic elements of electronic integrated circuits more meaningful. The other is making a complex componentequivalent to a series of basic elements of the same functionality, which is used to calculate the integration density for functionalcomponents realized with different structures. The results serve as a benchmark of the evolution of PICs and we can concludethat the density of integration measured in this way roughly increases by a factor of 2 per year. The prospects for a continuedincrease of spatial integration density are discussed.
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