Resultados de búsqueda - arrayed waveguide grating
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Millimeter-Long Silicon Photonic Antenna for Optical Phased Arrays at 2-μm Wavelength Band
Publicado 2021-01-01“…Here, a shallow etched two-dimensional subwavelength grating structure is proposed to improve the efficiency and aperture of the waveguide antenna. …”Silicon photonic optical phased arrays are promising solutions for solid-state LIDAR. But the nonlinear absorption significantly saturates the optical power in the waveguides at 1.5-μm wavelengths. Besides, the high refractive index contrast of silicon grating exhibits a strong diffractio...
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22
Extraordinary Optical Transmission in a Hybrid Plasmonic Waveguide
Publicado 2016-01-01“…Here, by folding a periodic grating into a compact cavity, we propose a waveguide-based structure within subwavelength, which also exhibits extraordinary optical transmission. …”Extraordinary optical transmission in free space through nanohole arrays has been widely investigated over the past two decades. However, because of its intrinsic nature of periodicity, it suffers from poor integration with nano-/micro- systems. Here, by folding a periodic grating into a...
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23
Hybrid-Integrated Multi-Lines Optical-Phased-Array Chip
Publicado 2025-07-01“…In order to increase the range of horizontal beam steering, we propose a half-wavelength pitch waveguide emitter with non-uniform width to reduce the crosstalk, which can remove the higher-order grating lobes in free space. …”We propose a hybrid-integrated III–V-silicon optical-phased-array (OPA) based on passive alignment flip–chip bonding technology and provide new solutions for LiDAR. To achieve a large range of vertical beam steering in a hybrid-integrated OPA, a multi-lines OPA in a single chip is introduced. The sy...
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Deuterated SiN/SiON Waveguides on Si Platform and Their Application to C-Band WDM Filters
Publicado 2017-01-01“…In addition, we also demonstrate a polarization-insensitive arrayed-waveguide grating with a SiON waveguide, whose loss is 0.29 dB/cm at 1550 nm. …”We describe low-loss SiN/SiON waveguides for wavelength-division-multiplexing filters on a Si platform. The key technology is a low-temperature deposition of refractive-index-controllable SiN/SiON films by using a hydrogen-free gas source (SiD<sub>4</sub>), which av...
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25
A Single-Chip Integrated Spectrometer via Tunable Microring Resonator Array
Publicado 2019-01-01“…We experimentally demonstrate a spectrometer, which consists of an arrayed waveguide grating (AWG), tunable microring resonator (MRR) array, and waveguide-coupled Ge-on-Si photodetector, all integrated onto a single chip. …”We experimentally demonstrate a spectrometer, which consists of an arrayed waveguide grating (AWG), tunable microring resonator (MRR) array, and waveguide-coupled Ge-on-Si photodetector, all integrated onto a single chip. The spectrometer achieves high resolution (0.1 ± 0.029 nm) and larg...
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26
Low-frequensy penetration of elastic waves through a periodic array of cracks
Publicado 2017-03-01“…The investigation of elastic wave penetration through periodic gratings is an important problem in the fields of the ultrasonic quantitative evaluation of materials, sound propagation and electromagnetic waveguides with diaphragms. …”Introduction. The investigation of elastic wave penetration through periodic gratings is an important problem in the fields of the ultrasonic quantitative evaluation of materials, sound propagation and electromagnetic waveguides with diaphragms. In practice, analytical results can be obtained under...
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27
Experimental Study of K-Band Broadband Antenna Array Using Artificial Inhomogeneous Dielectric Structures
Publicado 2019-12-01“…Additionally, a hybrid configuration of feeding network was proposed, in which one part of the network was developed by means of printed two-wire lines, while the other part was achieved by means of rectangular waveguides. The proposed antenna array demonstrates VSWR of less than 2 and an aperture efficiency above 0.5, side and diffractive lobe levels not exceed –12 in the 18…26 GHz range. …”Introduction. As a result of the extensive development of broadband communication in the millimetre wave band, there has arisen a need for antenna systems with a high level of directivity and compact dimensions, capable of operating across wide frequency ranges. However, at present, few engineering...
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28
Backward-Emitting Silicon Nitride Optical Phased Array Enabling Efficient Wavelength-Tuned Beam Steering
Publicado 2020-01-01“…Grating antennas based on a SiN waveguide suffer from a limited beam steering efficiency, owing to the relatively lower effective refractive index of the waveguide. …”Silicon nitride (SiN) optical phased arrays (OPAs) have emerged as a potential alternative to their silicon counterparts, due to their potential use in enhanced solid-state light detection and ranging. Grating antennas based on a SiN waveguide suffer from a limited beam steering efficiency, owing to...
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29
Solid-State MWIR Beam Steering Using Optical Phased Array on Germanium-Silicon Photonic Platform
Publicado 2019-01-01“…The OPA included a specially designed grating emitter waveguide array with uniform emission intensity along the <italic>mm</italic>-length waveguide propagation to realize very sharp instantaneous field-of-view (IFOV) and wide beam-steering total-field-of-view (TFOV). …”We demonstrate a chip-scale germanium-silicon optical phased array (OPA) fabricated on a CMOS-compatible platform capable of 2D beam steering in the mid-infrared wavelength range. The OPA included a specially designed grating emitter waveguide array with uniform emission intensity along the <ital...
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30
Wavelength-Multiplexed Duplex Transceiver Based on III-V/Si Hybrid Integration for Off-Chip and On-Chip Optical Interconnects
Publicado 2016-01-01“…A six-channel wavelength-division-multiplexed optical transceiver with a compact footprint of 1.5 <inline-formula> <tex-math notation="LaTeX">$\times$</tex-math></inline-formula> 0.65 mm<sup>2</sup> for off-chip and on-chip interconnects is demonstrated on a single silicon-on-insulator chip. An arrayed waveguide grating is used as the (de)multiplexer, and III-V electroabsorption sections fabricated by hybrid integration technology are used as both modulators and detectors, which also enable duplex links. …”A six-channel wavelength-division-multiplexed optical transceiver with a compact footprint of 1.5 <inline-formula> <tex-math notation="LaTeX">$\times$</tex-math></inline-formula> 0.65 mm<sup>2</sup> for off-chip and on-chip interconnects is demonstrated...
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High-Power (>300 mW) On-Chip Laser With Passively Aligned Silicon-Nitride Waveguide DBR Cavity
Publicado 2020-01-01“…Additionally, we demonstrate a multi-wavelength SCOWECL array comprised of four SCOWAs coupled to SiN-waveguide DBR gratings. …”We demonstrate a high-power on-chip 1550-nm laser implemented by passive flip-chip integration of a curved-channel, double-pass InGaAsP/InP slab-coupled optical waveguide amplifier (SCOWA) onto a photonic integrated circuit (PIC) containing a silicon nitride (SiN) waveguide and distributed Bragg ref...
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32
Large-Scale and Simple-Configuration Optical Switch Enabled by Asymmetric-Port-Count Subswitches
Publicado 2016-01-01“…The proposed switch consists of asymmetric-port-count delivery-and-coupling (DC) switches and wavelength-routing (WR) switches based on arrayed-waveguide gratings (AWGs). To compensate for the insertion loss of the DC switch part and to suppress the passband-frequency deviation inherent in multiple-input-port AWGs, we employ a combination of an aggregation coupler, an erbium-doped fiber amplifier, and a single-input-port AWG for the WR-switch part. …”We propose a novel optical switch architecture for intra-datacenter interconnection. The proposed switch consists of asymmetric-port-count delivery-and-coupling (DC) switches and wavelength-routing (WR) switches based on arrayed-waveguide gratings (AWGs). To compensate for the insertion loss of the...
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33
A 1-D Heterodyne Lens-Free Optical Phased Array Camera With Reference Phase Shifting
Publicado 2018-01-01“…” The OPA receiver elements couple the incident light to on-chip waveguides that is processed as a phased array receiver. …”This paper presents the first integrated silicon photonics optical phased array (OPA) receiver with imaging capabilities. A 32-element one-dimensional (1-D) OPA with an overall aperture size of 96 × 50 <inline-formula><tex-math notation="LaTeX">...
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34
Preamplified Demodulation of 56-Gb/s WDM-DPSK Signals by an AWG-Based InP PIC
Publicado 2016-01-01“…A compact preamplified receiver for wavelength division multiplexed-diffferential phase shift keying (WDM-DPSK) signals based on Gaussian filtering is proposed and simulated, and a first implementation, including an semiconductor optical amplifiers (SOA) and an ad-hoc arrayed waveguide grating (AWG), is demonstrated by monolithical integration in an InP platform. …”A compact preamplified receiver for wavelength division multiplexed-diffferential phase shift keying (WDM-DPSK) signals based on Gaussian filtering is proposed and simulated, and a first implementation, including an semiconductor optical amplifiers (SOA) and an ad-hoc arrayed waveguide grating (AWG)...
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35
Transmission Distance Extension of Directly Modulated Tunable V-cavity Laser Using AWG Wavelength Detuning
Publicado 2020-01-01“…Experiment results show that 10 Gbps signal can be transmitted error-free (BER<10<sup>−12</sup>) over 20 km SMF with a wavelength-detuning with respect to a Gaussian-type arrayed waveguide grating (AWG) without dispersion compensation. …”Directly modulated tunable lasers are highly desirable for constructing dense-wavelength division multiplexing (DWDM) access networks, owing to their advantages of low cost, compact size and low power consumption. However, the transmission distance for 10 Gbps is usually limited to about 10 km in th...
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High Assembly Tolerance and Cost-Effective 100-Gb/s TOSA With Silica-PLC AWG Multiplexer
Publicado 2019-01-01“…We have proposed a novel two-lens configuration for the coupling between distributed feedback laser diodes and a silica-based planar lightwave circuit arrayed waveguide grating to relax the lenses assembly requirement. …”A low-cost hybrid-integrated transmitter optical sub-assembly (TOSA) for a 100-Gb/s coarse wavelength division multiplexing (CWDM) transceiver with high assembly tolerance has been demonstrated. We have proposed a novel two-lens configuration for the coupling between distributed feedback...
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Nanoseconds low-polarization-sensitivity wideband 1 × 2 photonic integrated wavelength selective switch on 3-μm silicon platform
Publicado 2025-06-01“…The design of the 1 × 2 WSS includes a 12-channel 100 GHz spaced polarization insensitive (PI) arrayed waveguide grating (AWG) as the demultiplexer/multiplexer (Demux/Mux) and 1 × 2 Mach–Zehnder interferometer (MZI) switch units with nanosecond switching speed. …”As optical fiber communication systems evolve towards multi-band transmission (MBT) technology to maximize the fiber’s capacity, leveraging the entire low-loss window of optical fibers, there is a growing need for innovative optical components that can function outside the traditional C-band. Conseq...
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A 40 Gb/s Chip-to-Chip Interconnect for 8-Socket Direct Connectivity Using Integrated Photonics
Publicado 2018-01-01“…The C2C interconnect exploits an Si-based ring modulator as its transmitter and a co-packaged photodiode/transimpedance amplifier enabled receiver interconnected over an 8 × 8 Si-based arrayed waveguide grating router, allowing for a single-hop flat-topology interconnection between eight nodes. …”We present an O-band any-to-any chip-to-chip (C2C) interconnection at 40 Gb/s suitable for up to 8-socket direct connectivity in multi-socket server boards, utilizing integrated low-energy photonics for the transceiver and routing functions. The C2C interconnect exploits an Si-based ring...
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Toward Large‐Scale Photonic Chips Using Low‐Anisotropy Thin‐Film Lithium‐Tantalate
Publicado 2025-03-01“…Finally, a wavelength‐division‐multiplexed optical transmitter is developed with a data rate of 1.6 Tbps by monolithically integrating 8 EO modulators and an 8‐channel arrayed waveguide grating. Therefore, the demonstrated low‐birefringence LTOI platform shows strong ability in both passively and actively controlling photon behaviors on a chip, indicating great potential for ultrafast processing and communicating large‐capacity data.…”Abstract Photonic manipulation of large‐capacity data with the advantages of high speed and low power consumption is a promising solution for explosive growth demands in the era of post‐Moore. A well‐developed lithium‐niobate‐on‐insulator (LNOI) platform has been widely explored for high‐performance...
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Simultaneous Wavelength- and Mode-Division (De)multiplexing for High-Capacity On-Chip Data Transmission Link
Publicado 2016-01-01“…The size of the main passive optical parts (mode DE/MUXs and wavelength combiner) of the design is only <inline-formula> <tex-math notation="LaTeX">$10.4\ \times 114.2\ \mu\text{m}^{2}$</tex-math></inline-formula>, making the design promising for future compact and high-capacity optical interconnection applications. In another design, arrayed waveguide gratings are used for wavelength multiplexing, leading to a lower insertion loss of the optical connections. …”We present designs of wavelength-division-multiplexing (WDM) and mode-division-multiplexing (MDM) optical links using mode de/multiplexers (DE/MUXs) based on multimode interference (MMI) couplers with a tilt joint as a phase shifter. The properties of WDM-MDM links with three wavelengths and two opt...
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