Active Silicon Photonic Device Performance after 60Co Gamma Radiation
Abstract not provided.
Publications
Phase optimization of a silicon photonic two-dimensional electro-optic phased array
Optics InfoBase Conference Papers
Phase errors in large optical phased arrays degrade beam quality and must be actively corrected. Using a novel, low-power electro-optic design with matched pathlengths, we demonstrate simplified optimization and reduced sensitivity to wavelength and temperature.
Accurate photonic waveguide characterization using an arrayed waveguide structure
Optics Express
Measurement uncertainties in the techniques used to characterize loss in photonic waveguides becomes a significant issue as waveguide loss is reduced through improved fabrication technology. Typical loss measurement techniques involve environmentally unknown parameters such as facet reflectivity or varying coupling efficiencies, which directly contribute to the uncertainty of the measurement. We present a loss measurement technique, which takes advantage of the differential loss between multiple paths in an arrayed waveguide structure, in which we are able to gather statistics on propagation loss from several waveguides in a single measurement. This arrayed waveguide structure is characterized using a swept-wavelength interferometer, enabling the analysis of the arrayed waveguide transmission as a function of group delay between waveguides. Loss extraction is only dependent on the differential path length between arrayed waveguides and is therefore extracted independently from on and off-chip coupling efficiencies, which proves to be an accurate and reliable method of loss characterization. This method is applied to characterize the loss of the silicon photonic platform at Sandia Labs with an uncertainty of less than 0.06 dB/cm.
A stable ultra-high extinction silicon photonics amplitude modulator
Abstract not provided.
Characterization of Low Loss Photonic Waveguides Using An Arrayed Waveguide Structure
Abstract not provided.
Photonic Integrated Circuits for RF Electronic Systems
Abstract not provided.
Photonic Integrated Circuits for RF Electronic Systems
Abstract not provided.
Photonic design parameters for AWG-based RF channelized receivers
Optics InfoBase Conference Papers
An 11-channel 1-GHz bandwidth silicon photonic AWG was fabricated and measured in the lab. Two photonic architectures are presented: (1) RF-envelope detector, and (2) RF downconvertor for digital systems. The RF-envelope detector architecture was modeled based on the demonstrated AWG characteristics to determine estimated system-level RF receiver performance.
Photonic Integrated Circuits for RF Electronic Systems
Abstract not provided.
High Resolution Silicon Arrayed Waveguide Gratings for Photonic Signal Processing Applications
Abstract not provided.
Active phase correction of high resolution silicon photonic arrayed waveguide gratings
Optics Express
Arrayed waveguide gratings provide flexible spectral filtering functionality for integrated photonic applications. Achieving narrow channel spacing requires long optical path lengths which can greatly increase the footprint of devices. High index contrast waveguides, such as those fabricated in silicon-on-insulator wafers, allow tight waveguide bends which can be used to create much more compact designs. Both the long optical path lengths and the high index contrast contribute to significant optical phase error as light propagates through the device. Therefore, silicon photonic arrayed waveguide gratings require active or passive phase correction following fabrication. Here we present the design and fabrication of compact silicon photonic arrayed waveguide gratings with channel spacings of 50, 10 and 1 GHz. The largest device, with 11 channels of 1 GHz spacing, has a footprint of only 1.1 cm2. Using integrated thermo-optic phase shifters, the phase error is actively corrected. We present two methods of phase error correction and demonstrate state-of-the-art cross-talk performance for high index contrast arrayed waveguide gratings. As a demonstration of possible applications, we perform RF channelization with 1 GHz resolution. Additionally, we generate unique spectral filters by applying non-zero phase offsets calculated by the Gerchberg Saxton algorithm.
Silicon Photonics at Sandia National Laboratories
Abstract not provided.
Sandia Silicon Photonics MPW
Abstract not provided.
Silicon Photonics at Sandia
Abstract not provided.
Operation of high-speed silicon photonic micro-disk modulators at cryogenic temperatures
2016 Conference on Lasers and Electro-Optics, CLEO 2016
We demonstrate the operation of silicon micro-disk modulators at temperatures as low as 3.8K. We characterize the steady-state and high-frequency performance and look at the impact of doping concentration.
Active phase correction of compact, high resolution silicon photonic arrayed waveguide gratings
2016 IEEE Avionics and Vehicle Fiber-Optics and Photonics Conference, AVFOP 2016
We demonstrate compact silicon photonic arrayed waveguide gratings with channel spacing down to 1 GHz using active phase correction. The relative phase of each path within the device is directly measured using an interferometer, and two methods of phase optimization are implemented and compared.
Superconductivity in epitaxially grown self-assembled indium islands: Progress towards hybrid superconductor/semiconductor optical sources [Invited]
Journal of the Optical Society of America B: Optical Physics
Currently, superconducting qubits lead the way in potential candidates for quantum computing. At the same time, transferring quantum information over long distances typically relies on the use of photons as the elementary qubit. Converting between stationary electronic qubits in superconducting systems and traveling photonic qubits is a challenging yet necessary goal for the interface of quantum computing and communication. One promising path to achieving this goal appears to be the integration of superconductivity with optically active semiconductors, with quantum information being transferred between the two by means of the superconducting proximity effect. Obtaining good interfaces between superconductors and semiconductors is the next obvious step for improving these hybrid systems. Here, we report on our observation of superconductivity in a 2.3 m diameter self-assembled indium structure grown epitaxially on the surface of a semiconductor material.
Active Phase Correction of Compact High Resolution Silicon Photonic Arrayed Waveguide Gratings
Abstract not provided.
Results 26–43 of 43