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A laser is realized by flip-chip bonding an indium phosphide reflective semiconductor optical amplifier with a turning mirror to a silicon photonic circuit with a surface grating coupler. An external cavity laser is formed and single-mode CW lasing is demonstrated.
In modern integrated systems, interconnect and thermal management technologies have become two major limitations to system performance. In this paper, a number of technologies are presented to address these challenges. First, low-loss polymer-embedded vias are demonstrated in thick wafers compatible with microfluidics. Next, fluidic I/Os for delivery of fluid to microfluidic heat sinks are demonstrated...
A novel spot-size converter for coupling between a sub-μm silicon waveguide and an optical fiber provides 0.5 dB loss for TE polarization at 1550 nm with minimum wavelength dependence and a path for negligible PDL.
Mode division multiplexing of modes in a silicon waveguide supporting three optical modes is demonstrated in the silicon on insulator platform. Cross-talk suppression of 17dB and 12dB are obtained for the zeroth and second order modes respectively. The extinction bandwidth is observed to increase with the mode order indicating a stronger cross coupling coefficient as the mode order is increased. The...
We demonstrate a silicon PIC mode multiplexer using grating couplers. An aluminum mirror is introduced for coupling efficiency improvement. A highest coupling efficiency of −10.6 dB with 3.7 dB mode dependent coupling loss is achieved.
A novel ultra-broadband spectral beam combiner is designed and demonstrated spanning greater than four octaves from ultraviolet to mid-wave infrared bands with low M squared output.
A CMOS-compatible, visible, plenoptic (angle, polarization and wavelength) detector, based on a grating-coupled waveguide structure, is demonstrated with an angular resolution of < 1° and a corresponding wavelength resolution of < 5 nm.
We design, fabricate, and demonstrate an optimized silicon nitride multilayer platform including ultra-low interlayer vertical coupling loss of 0.05 dB, multilayer crossing loss of 0.265 dB at 90° crossing angle, and 50 μm bending radius.
Silicon interposer based 2.5D IC is a promising solution for providing low interconnect delay, high bandwidth, and heterogeneous integration. It has been considered as an alternative of the 3D technology. However, testing is a big issue in 2.5D IC. This paper presents a new contactless testing mechanism for pre-bond interposer testing. Our testing mechanism attempts to detect a defective interposer...
We achieved three-dimensional mode conversion between a Si-wire waveguide and a deep sub-λ plasmonic slot waveguide (60 χ 50 nm2) for the first time. The coupling loss was only about 2 dB.
We designed magneto-optic waveguide isolators based on the nonreciprocal coupling by the coupled mode theory. Optical isolation over 40 dB was estimated with the waveguide length of 700 μm.
We demonstrate an efficient tunable grating coupler using thermo-optic heater in silicon. Tuning of the central wavelength from 1537nm to 1573nm is achieved with an increased 1 dB-bandwidth up to 59nm.
We analyzed a Mach-Zehnder plasmonic modulator with metal-insulator-metal structure embedded by the Furan-Thiophene Chromophore. π-phase shift between two Mach-Zehnder arms can be obtained with a device length of 6.5 μm and the figure of merit of 3.1.
We demonstrate a thermally tunable silicon grating coupler. The experimental result of ∼10nm shift in center wavelength at about 410mW electrical power was in reasonable agreement with the expected ∼16nm tuning range.
Propagation characteristics of magnetic and nonmagnetic plasmon waveguides using Au and Fe have been studied. The devices are theoretically optimized and fabricated on a SOI substrate. The transmission characteristics are investigated on those waveguides.
Simultaneous transmit and receive systems (STAR) are proposed to double the spectral efficiency and enhance spectrum utilization in the traditional microwave band. A major problem is high power self-interference (SI) due to the proximity of the transmit and receive antennas. In this paper, we propose to significantly improve system-level performance using a novel high isolation RF front-end based...
The quadrature error analysis, structure design and simulation of a symmetric decoupled silicon micro-gyroscope with high decoupling performance are present in the paper. The improvements of straight beam, the anchor and the balance beam greatly restrained the mechanical error. In the drive mode, the maximum displacement of the sense framework along the sense axis is 0.088% of the vibration amplitude...
We investigate the effect of waveguide surface roughness on the coupling efficiency between silicon inverse tapers and lensed fibers. Short taper lengths of 30–50 micrometers are shown to achieve minimum coupling loss.
In advanced technology nodes, incremental delay due to coupling is a serious concern. Design companies spend significant resources on static timing analysis (STA) tool licenses with signal integrity (SI) enabled. The runtime of the STA tools in SI mode is typically large due to complex algorithms and iterative calculation of timing windows to accurately determine aggressor and victim alignments, as...
We demonstrate theoretically a silicon resonator reflector, having no free spectral range, using a distributed Bragg reflector and a contra-directional grating coupler. The spectral response of the device meets numerous commercial specifications for a clear window of 5 GHz and a channel spacing of 100 GHz.
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