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We propose and experimentally demonstrate a compact integrated silicon photonic comb filter based on two cascaded Sagnac-loop mirrors. By using thermal tuning with three micro-heaters, the center wavelength can be tuned over several FSRs and the 3-dB bandwidth can be tuned to 2.5 GHz.
With the development of social network based applications, different service approaches to achieve these applications have emerged. Users' reporting and sharing of their consumption experience can be utilized to rate the quality of different approaches of online services. How to ensure the authenticity of users' reports and identify malicious ones with cheating reports become important issues to achieve...
By exploiting multiple non-degenerate four-wave mixing (FWM) and quadrature phase-shift keying (QPSK) signals, we experimentally demonstrate three-input (A, B, C) simultaneous multicasted quaternary addition/subtraction (A+C-B, A+B-C, B+C-A) at 20 Gbit/s based on a silicon waveguide. Alignment tolerance of three input signals is also evaluated in the experiment.
Silicon photonics offers a promising integration platform facilitating chip-scale optical signal processing. We review recent research progress in integrated optical signal processing with silicon platform by employing advanced multi-level modulation formats. Using fabricated silicon waveguides, gratings, couplers, microring resonators, vertical slot waveguides and hybrid plasmonic waveguides, we...
Certificateless cryptography avoids the key escrow problem in identity-based crytosystems and certificate management in traditional public-key crytosystems, it has been researched by many scholars and many certificateless signature schemes have been proposed. However, most of them exist some security drawbacks and are insecure for some kinds of attacks. In this paper, we analyze two certificateless...
By exploiting two degenerate four-wave mixing in a silicon waveguide and quadrature phase-shift keying (QPSK) signals, we experimentally demonstrate two-input (A, B) simultaneous optical quaternary hybrid doubling/subtraction (2A-B, 2B-A).
A novel 64-channel silicon hybrid demultiplexer is proposed and demonstrated by utilizing a 1×4 ADC-type mode demultiplexer and two 17×17 bi-directional AWGs. With the proposed design, the hybrid demultiplexer becomes very compact and this issue of the channel-wavelength's misalignment is also relaxed greatly in comparison with the previous design. The insertion loss and crosstalk for the fabricated...
Novel fabrication process of SiNx/SiO2 waveguide based on sidewall oxidation of patterned silicon substrate is proposed. The fabrication time of the lower SiO2 cladding is about one third of that of the conventional process.
We will review our recent progress in the fabrication of integrated nanophotonic devices and their applications in on-chip optical signal transmission and processing with advanced modulation formats. We will talk about both theoretical and experimental works on chip-scale optical signal transmission for photonic interconnections and various on-chip photonic signal processing functions (wavelength...
We design and fabricate a vertical hybrid SPP waveguide. The suitability of ultrahigh-bandwidth data transmission through the proposed waveguide by transmitting 1.8-Tbit/s (161 wavelength 11.2-Gbit/s) WDM OFDM 16-QAM is studied. The BERs of all 161 channels are less than 1e−3.
We design and fabricate silicon vertical slot waveguides. Ultra-wide bandwidth 1.8-Tbit/s (161 WDM 11.2-Gbit/s OFDM 16-QAM) data transmission through 1-mm, 2mm, 3.1-mm, 12.2-mm-long silicon vertical slot waveguides are demonstrated in the experiment. All 161 WDM channels achieve BER less than 1e-3 after propagating through silicon vertical slot waveguides.
We report all-optical wavelength conversion of OFDM m-QAM signals by exploiting degenerate four-wave mixing (FWM) in a silicon waveguide. Low penalty silicon-waveguide-based wavelength conversions of OFDM m-QAM (m=16, 32, 64, 128) signals are successfully demonstrated in the experiment.
A 330,000 gate field programmable gate array (FPGA) VS12C fabricated on 0.2μm full-depletion silicon-on-insulator (FD SOI) process is presented and the test results indicate this chip has the lower power and higher tolerance to radiation compared with Xilinx radiation-hardened XQVR300 chip implemented on 0.22μm epitaxial silicon. This paper demonstrates the benefit of the FD SOI technology on low...
By exploiting multiple non-degenerate four-wave mixing in silicon-organic hybrid slot waveguide and 16-ary phase-shift keying signals, we implement three-input (A, B, C) multicasted 160-Gbit/s optical hexadecimal addition/subtraction (A+B−C, A+C−B, B+C−A, A+B+C, A−B−C, B−A−C). Performance is evaluated by error vector magnitude and dynamic range of signal power.
We design a novel wedge hybrid terahertz (THz) plasmonic waveguide which features longer propagation length and deep-subwavelength mode confinement. It offers improved propagation length, normalized mode area and figure of merit 1.4, 13.5 and 5.3 times compared to the rectangular hybrid THz waveguide.
We present ultrahigh-speed transmission of 3.84-Tbit/s 64-QAM signal in Si ridge and Si slot waveguides. Si slot waveguide confining light in air slot region features reduced nonlinearity and resultant superior transmission performance with low penalty for varied input signal power from 1 to 250 mW.
We present an ultra-compact optical diode using nonlinear second-order silicon microring resonator which is complementary metal-oxide semiconductor (CMOS) compatible. The designed optical diode features high isolation (>20 dB) and more tolerant resonance wavelength mismatch (+/−0.35 nm with <1.5 dB isolation degradation).
A polarization beam splitter with cascaded asymmetrical directional couplers is demonstrated experimentally on a silicon-on-insulator (SOI) platform. The measured extinction ratios of the fabricated PBS are about 11dB and 13dB for TE/TM polarizations.
The polarization compositions of fundamental quasi-TE and quasi-TM modes of a strip silicon waveguide are characterized with free-space polarizers, and their polarization extinction ratios depend on the sizes of various apertures in the experimental setups.
We evaluate the optical communication performance of individual comb lines generated in silicon nitride microresonators. A high coherence mode yields error-free communications at 10 Gb/s, while a partially coherent mode results in closed eye diagrams.
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