Arijit Misra
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View article: Spectrally stitched WDM nonlinear frequency division multiplexed transmission system
Spectrally stitched WDM nonlinear frequency division multiplexed transmission system Open
We present the concept and design of a 100 GHz PIC-based nonlinear frequency division multiplexed transmission system in which four b-modulated spectrally overlapping channels are spectrally stitched without frequency guard bands to obtain…
View article: Optical channel aggregation based on modulation format conversion by coherent spectral superposition with electro-optic modulators
Optical channel aggregation based on modulation format conversion by coherent spectral superposition with electro-optic modulators Open
Spectrally efficient modulation formats become essential for optical network scaling as the demand for routed data streams exceeds the present wavelength-division multiplexing systems’ throughput. However, achieving high spectral efficienc…
View article: Compact and Energy-Efficient Forward-Biased PN Silicon Mach-Zehnder Modulator
Compact and Energy-Efficient Forward-Biased PN Silicon Mach-Zehnder Modulator Open
A compact device model along with simulations and an experimental analysis of a forward-biased PN junction-based silicon Mach-Zehnder modulator (MZM) with a phase-shifter length of 0.5 mm is presented. By placing the PN junction to a certa…
View article: High-Bandwidth Arbitrary Signal Detection Using Low-Speed Electronics
High-Bandwidth Arbitrary Signal Detection Using Low-Speed Electronics Open
The growing demand for bandwidth and energy efficiency requires new solutions for signal detection and processing. We demonstrate a concept for high-bandwidth signal detection with low-speed photodetectors and electronics. The method is ba…
View article: Reconfigurable and Real-Time Nyquist OTDM Demultiplexing in Silicon Photonics
Reconfigurable and Real-Time Nyquist OTDM Demultiplexing in Silicon Photonics Open
We demonstrate for the first time, to the best of our knowledge, reconfigurable and real-time orthogonal time-domain demultiplexing of coherent multilevel Nyquist signals in silicon photonics. No external pulse source is needed and frequen…
View article: Optical Channel Aggregation by Coherent Spectral Superposition with Electro-Optic Modulators
Optical Channel Aggregation by Coherent Spectral Superposition with Electro-Optic Modulators Open
As the bit rates of routed data streams exceed the throughput of single wavelength-division multiplexing channels, spectral traffic aggregation becomes essential for optical network scaling. Here we propose a scheme for all-optical aggrega…
View article: Optical Channel Aggregation by Coherent Spectral Superposition with\n Electro-Optic Modulators
Optical Channel Aggregation by Coherent Spectral Superposition with\n Electro-Optic Modulators Open
As the bit rates of routed data streams exceed the throughput of single\nwavelength-division multiplexing channels, spectral traffic aggregation becomes\nessential for optical network scaling. Here we propose a scheme for all-optical\naggr…
View article: Brillouin-scattering-induced transparency enabled reconfigurable sensing of RF signals
Brillouin-scattering-induced transparency enabled reconfigurable sensing of RF signals Open
Real-time spectrum sensing is essential to enable dynamic and rapid spectrum sharing of unused frequencies to cater the substantial demands of new wireless services deploying the existing RF bands. In this paper, we present a novel, real-t…
View article: Agnostic sampling transceiver
Agnostic sampling transceiver Open
Increasing demands for data centers, backbone, access, and wireless networks require inventive concepts to transmit and distribute digital or analog signal waveforms. We present a new, extremely simple transceiver concept, fundamentally di…
View article: Analysis of Non-Idealities in the Generation of Reconfigurable Sinc-Shaped Optical Nyquist Pulses
Analysis of Non-Idealities in the Generation of Reconfigurable Sinc-Shaped Optical Nyquist Pulses Open
Optical sinc-shaped Nyquist pulses are widely used in microwave photonics, optical signal processing, and optical telecommunications due to their numerous advantages, like rectangular shape in the frequency domain, the orthogonality and th…
View article: Integrated High-Resolution Optical Spectrum Analyzer With Broad Operational Bandwidth
Integrated High-Resolution Optical Spectrum Analyzer With Broad Operational Bandwidth Open
Precise optical spectrum analysis with high resolution by an economical and reliable device is of much interest in optical science and technology. In this work, we propose a silicon-photonic integrated optical spectrum analyzer comprised o…
View article: Nonlinearity- and dispersion- less integrated optical time magnifier based on a high-Q SiN microring resonator
Nonlinearity- and dispersion- less integrated optical time magnifier based on a high-Q SiN microring resonator Open
The ability to measure optical signals with fast dynamics is of significant interest in many application fields. Usually, single-shot measurements of non-periodic signals can be enabled by time magnification methods. Like an optical lens i…
View article: Integrated source-free all optical sampling with a sampling rate of up to three times the RF bandwidth of silicon photonic MZM
Integrated source-free all optical sampling with a sampling rate of up to three times the RF bandwidth of silicon photonic MZM Open
Source-free all optical sampling, based on the convolution of the signal spectrum with a frequency comb in an electronic-photonic, co-integrated silicon device will be presented for the first time, to the best of our knowledge. The method …
View article: Eight-Channel Silicon-Photonic Wavelength Division Multiplexer With 17 GHz Spacing
Eight-Channel Silicon-Photonic Wavelength Division Multiplexer With 17 GHz Spacing Open
Dense wavelength division multiplexers are key components of data communication networks. This paper presents a silicon-photonic eight-channel multiplexer device with a channel spacing of only 0.133 nm (17 GHz). Devices were fabricated in …
View article: Orthogonal Full-Field Optical Sampling
Orthogonal Full-Field Optical Sampling Open
Sampling is the first step to convert analogue into digital signals and one of the
\nbasic concepts for information handling. All practical sampling systems, however, are accompanied
\nwith errors. Bandwidth-limited signals can be seen as …
View article: Nanofabrication of SOI-Based Photonic Waveguide Resonators for Gravimetric Molecule Detection
Nanofabrication of SOI-Based Photonic Waveguide Resonators for Gravimetric Molecule Detection Open
A silicon photonic microresonator comprising two curved vertical grating couplers and a single suspended Si nanowaveguide (NWG) is developed to investigate the giant enhanced Brillouin scattering in subwavelength NWGs caused by photon-phon…