scholarly journals Experimental realization of a CMOS-compatible optical directed priority encoder using cascaded micro-ring resonators

Nanophotonics ◽  
2018 ◽  
Vol 7 (4) ◽  
pp. 727-733 ◽  
Author(s):  
Huifu Xiao ◽  
Dezhao Li ◽  
Zilong Liu ◽  
Xu Han ◽  
Wenping Chen ◽  
...  
Keyword(s):  
Monochromatic Light ◽  
Optical Signal ◽  
Electrical Signal ◽  
Optical Switches ◽  
Ring Resonators ◽  
Modulation Scheme ◽  
Logical Function ◽  
Experimental Realization ◽  
Operation Speed ◽  
Integrated Optical

AbstractIn this paper, we propose and experimentally demonstrate an integrated optical device that can implement the logical function of priority encoding from a 4-bit electrical signal to a 2-bit optical signal. For the proof of concept, the thermo-optic modulation scheme is adopted to tune each micro-ring resonator (MRR). A monochromatic light with the working wavelength is coupled into the input port of the device through a lensed fiber, and the four input electrical logic signals regarded as pending encode signals are applied to the micro-heaters above four MRRs to control the working states of the optical switches. The encoding results are directed to the output ports in the form of light. At last, the logical function of priority encoding with an operation speed of 10 Kbps is demonstrated successfully.

scholarly journals Monolithic optoelectronic integrated broadband optical receiver with graphene photodetectors

Nanophotonics ◽  
2017 ◽  
Vol 6 (6) ◽  
pp. 1343-1352 ◽  
Author(s):  
Chuantong Cheng ◽  
Beiju Huang ◽  
Xurui Mao ◽  
Zanyun Zhang ◽  
Zan Zhang ◽  
...  
Keyword(s):  
Integrated Circuit ◽  
Low Cost ◽  
Three Dimensional ◽  
Complementary Metal Oxide Semiconductor ◽  
Optical Signal ◽  
Optical Interconnect ◽  
Optical Receiver ◽  
Oxide Semiconductor ◽  
Experimental Realization ◽  
Operation Speed

AbstractOptical receivers with potentially high operation bandwidth and low cost have received considerable interest due to rapidly growing data traffic and potential Tb/s optical interconnect requirements. Experimental realization of 65 GHz optical signal detection and 262 GHz intrinsic operation speed reveals the significance role of graphene photodetectors (PDs) in optical interconnect domains. In this work, a novel complementary metal oxide semiconductor post-backend process has been developed for integrating graphene PDs onto silicon integrated circuit chips. A prototype monolithic optoelectronic integrated optical receiver has been successfully demonstrated for the first time. Moreover, this is a firstly reported broadband optical receiver benefiting from natural broadband light absorption features of graphene material. This work is a perfect exhibition of the concept of monolithic optoelectronic integration and will pave way to monolithically integrated graphene optoelectronic devices with silicon ICs for three-dimensional optoelectronic integrated circuit chips.

scholarly journals Experimental realization of an optical digital comparator using silicon microring resonators

Nanophotonics ◽  
2018 ◽  
Vol 7 (3) ◽  
pp. 669-675 ◽  
Author(s):  
Yonghui Tian ◽  
Huifu Xiao ◽  
Xiaosuo Wu ◽  
Zilong Liu ◽  
Yinghao Meng ◽  
...  
Keyword(s):  
Electrical Signal ◽  
Silicon On Insulator ◽  
Oxide Semiconductor ◽  
Microring Resonators ◽  
Digital Signals ◽  
Experimental Realization ◽  
Electrical Signals ◽  
Operation Speed ◽  
Digital Comparator ◽  
Comparison Results

AbstractWe propose and experimentally demonstrate a silicon photonic circuit that can perform the comparison operation of two-bit digital signals based on microring resonators (MRRs). Two binary electrical signals regarded as two operands of desired comparison digital signals are applied to three MRRs to modulate their resonances through the microheaters fabricated on the top of MRRs, respectively (here, one binary electrical signal is applied to two MRRs by a 1×2 electrical power splitter, which means that the two MRRs are modulated by the same binary electrical signal). The comparison results of two binary electrical signals can be obtained at two output ports in the form of light. The proposed device is fabricated on a silicon-on-insulator substrate using the complementary metal-oxide-semiconductor fabrication process, and the dynamic characterization of the device with the operation speed of 10 kbps is demonstrated successfully.

scholarly journals Record Purcell factors in ultracompact hybrid plasmonic ring resonators

2019 ◽  
Vol 5 (8) ◽  
pp. eaav1790 ◽  
Author(s):  
Y. Su ◽  
P. Chang ◽  
C. Lin ◽  
A. S. Helmy
Keyword(s):  
Long Range ◽  
Propagation Loss ◽  
Ring Resonators ◽  
Ohmic Loss ◽  
Plasmonic Waveguides ◽  
Purcell Factor ◽  
Experimental Realization ◽  
Integrated Optical ◽  
Integrated Optical Devices ◽  
Mode Area

For integrated optical devices and traveling-wave resonators, realistic use of the superior wave-matter interaction offered by plasmonics is impeded by ohmic loss, which increases rapidly with mode volume reduction. In this work, we report composite hybrid plasmonic waveguides (CHPWs) that are not only capable of guiding subwavelength optical mode with long-range propagation but also unrestricted by stringent requirements in structural, material, or modal symmetry. In these asymmetric CHPWs, the versatility afforded by coupling dissimilar plasmonic modes provides improved fabrication tolerance and more degrees of device design optimization. Experimental realization of CHPWs demonstrates propagation loss and mode area of 0.03 dB/μm and 0.002 μm2, corresponding to the smallest combination among long-range plasmonic structures reported to date. CHPW ring resonators with 2.5-μm radius were realized with record Purcell factor compared with existing plasmonic and dielectric resonators of similar radii.

SiC monolithically integrated wavelength selector with 4 channels

2013 ◽  
Vol 1536 ◽  
pp. 79-84 ◽  
Author(s):  
M. Vieira ◽  
M. A. Vieira ◽  
V. Silva ◽  
P. Louro ◽  
J. Costa
Keyword(s):  
Optical Signal ◽  
Optical Switches ◽  
Active Filter ◽  
Back Side ◽  
Optical Signals ◽  
Monolithically Integrated ◽  
Integrated Optical ◽  
Visible Wavelengths ◽  
Binary Weighted ◽  
The Relationship

ABSTRACTIn this paper we present a monolithically integrated wavelength selector based on a double pin/pin a-SiC:H integrated optical active filter that requires optical switches to select visible wavelengths. Red, green, blue and violet pulsed communication channels are transmitted together, each one with a specific bit sequence. The combined optical signal is analyzed by reading out the generated photocurrent, under violet (400 nm) background applied either from the front or the back side of the device. The front and back backgrounds acts as channel selectors that selects one or more channels by splitting portions of the input multi-channel optical signals across the front and the back photodiodes. The transfer characteristics effects due to changes irradiation side are presented. The relationship between the optical inputs and the corresponding digital output levels is established through a 16-element look-up table to perform the optoelectronic conversion.Results show that the wavelength selector acts as a reconfigurable active filter that enhances the spectral sensitivity in a specific wavelength range and quenched it in the others, tuning a specific band. A binary weighted RGBV code that takes into account the specific weights assigned to each bit position is presented and establishes the optoelectronic functions.

An all optical photonic crystal half adder suitable for optical processing applications

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Hamed Azhdari ◽  
Sahel Javahernia
Keyword(s):  
Photonic Crystal ◽  
Optical Waveguides ◽  
High Speed ◽  
Building Blocks ◽  
Optical Signal ◽  
Ring Resonators ◽  
Optical Processing ◽  
Nonlinear Photonic Crystal ◽  
Half Adder ◽  
All Optical

Abstract Increasing the speed of operation in all optical signal processing is very important. For reaching this goal one needs high speed optical devices. Optical half adders are one of the important building blocks required in optical processing. In this paper an optical half adder was proposed by combining nonlinear photonic crystal ring resonators with optical waveguides. Finite difference time domain method wase used for simulating the final structure. The simulation results confirmed that the rise time for the proposed structure is about 1 ps.

Integrated optical switches using liquid crystal cells

1998 ◽  
Author(s):  
Luigi Sirleto ◽  
Michele A. Forastiere ◽  
Giancarlo C. Righini ◽  
Alessandro Verciani ◽  
Giancarlo Abbate ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Optical Switches ◽  
Integrated Optical ◽  
Crystal Cells

Linear all-optical signal processing using silicon micro-ring resonators

2016 ◽  
Vol 9 (3) ◽  
pp. 362-376 ◽  
Author(s):  
Yunhong Ding ◽  
Haiyan Ou ◽  
Jing Xu ◽  
Meng Xiong ◽  
Yi An ◽  
...  
Keyword(s):  
Signal Processing ◽  
Optical Signal Processing ◽  
Optical Signal ◽  
Ring Resonators ◽  
All Optical

scholarly journals Multi-Addressed Fiber Bragg Structures for Microwave-Photonic Sensor Systems

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2693 ◽  
Author(s):  
Oleg Morozov ◽  
Airat Sakhabutdinov ◽  
Vladimir Anfinogentov ◽  
Rinat Misbakhov ◽  
Artem Kuznetsov ◽  
...  
Keyword(s):  
Frequency Shift ◽  
Microwave Frequency ◽  
Optical Signal ◽  
Electrical Signal ◽  
Infrared Range ◽  
Electromagnetic Spectrum ◽  
Sensor Systems ◽  
Central Frequency ◽  
Bragg Structure ◽  
Microwave Photonic

The new theory and technique of Multi-Addressed Fiber Bragg Structure (MAFBS) usage in Microwave Photonics Sensor Systems (MPSS) is presented. This theory is the logical evolution of the theory of Addressed Fiber Bragg Structure (AFBS) usage as sensors in MPSS. The mathematical model of additive response from a single MAFBS is presented. The MAFBS is a special type of Fiber Bragg Gratings (FBG), the reflection spectrum of which has three (or more) narrow notches. The frequencies of narrow notches are located in the infrared range of electromagnetic spectrum, while differences between them are located in the microwave frequency range. All cross-differences between optical frequencies of single MAFBS are called the address frequencies set. When the additive optical response from a single MAFBS, passed through an optic filter with an oblique amplitude–frequency characteristic, is received on a photodetector, the complex electrical signal, which consists of all cross-frequency beatings of all optical frequencies, which are included in this optical signal, is taken at its output. This complex electrical signal at the photodetector’s output contains enough information to determine the central frequency shift of the MAFBS. The method of address frequencies analysis with the microwave-photonic measuring conversion method, which allows us to define the central frequency shift of a single MAFBS, is discussed in the work.

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