Surface emitting lasers
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2021 IEEE Photovoltaic Specialists Conference (PVSC)
Photovoltaic materials, devices, systems and related science and technology
The Pulsed Power Conference is held on a biannual basis and serves as the principal forum forthe exchange of information on pulsed power technology and engineering.
ECTC is the premier international conference sponsored by the IEEE Components, Packaging and Manufacturing Society. ECTC paper comprise a wide spectrum of topics, including 3D packaging, electronic components, materials, assembly, interconnections, device and system packaging, optoelectronics, reliability, and simulation.
2020 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
CVPR is the premier annual computer vision event comprising the main conference and several co-located workshops and short courses. With its high quality and low cost, it provides an exceptional value for students, academics and industry researchers.
The International Conference on Robotics and Automation (ICRA) is the IEEE Robotics and Automation Society’s biggest conference and one of the leading international forums for robotics researchers to present their work.
The IEEE Transactions on Advanced Packaging has its focus on the modeling, design, and analysis of advanced electronic, photonic, sensors, and MEMS packaging.
Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission
IEEE Computer Graphics and Applications (CG&A) bridges the theory and practice of computer graphics. From specific algorithms to full system implementations, CG&A offers a strong combination of peer-reviewed feature articles and refereed departments, including news and product announcements. Special Applications sidebars relate research stories to commercial development. Cover stories focus on creative applications of the technology by an artist or ...
The design and manufacture of consumer electronics products, components, and related activities, particularly those used for entertainment, leisure, and educational purposes
Electronics Letters, 2008
IEEE Journal of Quantum Electronics, 1998
A new type of vertical-cavity surface-emitting laser (VCSEL) is proposed and analyzed to show the possibility of optical pumping from an integrated edge- emitting laser. With this scheme, it may be possible to make VCSEL's of very small dimensions and VCSEL arrays. The laser design utilizes dopant induced intermixing of quantum wells (QW's) to provide different gain regions for the ...
IEEE Photonics Technology Letters, 1998
A two-stage multihop shuffle network is experimentally demonstrated. The system is implemented using two-dimensional multiple-plane wavelength- division-multiplexed (WDM) optical interconnections consisting of an integrated multiple-wavelength WDM transmitting vertical-cavity surface- emitting laser arrays and three wavelength-selective detector arrays. Two-hop data relay of the two-state shuffle network multihop is performed at 622 and 155 Mb/s for a two-wavelength and a three-wavelength fanout, ...
LEOS 1993 Summer Topical Meeting Digest on Optical Microwave Interactions/Visible Semiconductor Lasers/Impact of Fiber Nonlinearities on Lightwave Systems/Hybrid Optoelectronic Integration and Packagi, 1993
IEEE Journal of Selected Topics in Quantum Electronics, 1997
Multiple-wavelength vertical-cavity surface-emitting InGaAs QW laser (MW- VCSEL) arrays are fabricated using two patterned-substrate growth techniques both in conjunction with a location-resolvable in situ laser reflectometer in a molecular beam epitaxy (MBE) system. A backside pattern on the substrate is used to induce a temperature profile on the growth surface. In the first technique, we used a temperature-dependent growth rate ...
Nanotechnology For Electrical Engineers
Lighting the Way: Optical Sensors in the Life Sciences
ITRI: Technology Advances in Flexible Displays and Substrates
NeuroGrid: Recording action potentials and large-scale network activity from the surface of the brain - IEEE Brain Workshop
IMS 2011 Microapps - A Multi-Level Conductor Surface Roughness Model
Hertz-Class Brillouin Lasing with Nanokelvin Thermal Sensing - William Loh - Closing Ceremony, IPC 2018
Breaking Spectral and Performance Barriers for Diode Lasers - Plenary Speaker, Manijeh Razeghi - IPC 2018
Ching W. Tang, Stephen R. Forrest and Mark E. Thompson receive the IEEE Jun-Ichi Nishizawa Medal - Honors Ceremony 2017
An IEEE IPC Special Session with Alexander Spott of The Optoelectronics Research Group
Electrically-Pumped 1.31 μm MQW Lasers by Direct Epitaxy on Wafer-Bonded InP-on-SOI Substrate - Yingtao Hu - Closing Ceremony, IPC 2018
Quantum Computation - ASC-2014 Plenary series - 4 of 13 - Tuesday 2014/8/12
IMPASS: Intelligent Mobility Platform with Active Spoke System
Ultrafast Lasers for Multi-photon Microscopy - Plenary Speaker: Jim Kafka - IPC 2018
M. George Craford accepts the IEEE Edison Medal - Honors Ceremony 2017
IEEE Magnetics Distinguished Lecture - Yoshichika Otani
3D Body-Mapping for Severely Burned Patients - Julia Loegering - IEEE EMBS at NIH, 2019
Yasuhiko Arakawa, Pallab Bhattacharya, Dieter H. Bimberg - IEEE Jun-Ichi Nishizawa Medal, 2019 IEEE Honors Ceremony
BSIM Spice Model Enables FinFET and UTB IC Design
Lasers in Your Living Room with Mitsubishi's New LaserVue TVs
A new type of vertical-cavity surface-emitting laser (VCSEL) is proposed and analyzed to show the possibility of optical pumping from an integrated edge- emitting laser. With this scheme, it may be possible to make VCSEL's of very small dimensions and VCSEL arrays. The laser design utilizes dopant induced intermixing of quantum wells (QW's) to provide different gain regions for the surface and edge-emitting sections. The multimode rate equations are used to evaluate the possibility of such a laser and the roles of the various design parameters are discussed. It is seen that efficient surface photon emission is possible for high vertical-cavity mirror reflectivities and sufficient separation of bandgap energies for the two QW gain regions.
A two-stage multihop shuffle network is experimentally demonstrated. The system is implemented using two-dimensional multiple-plane wavelength- division-multiplexed (WDM) optical interconnections consisting of an integrated multiple-wavelength WDM transmitting vertical-cavity surface- emitting laser arrays and three wavelength-selective detector arrays. Two-hop data relay of the two-state shuffle network multihop is performed at 622 and 155 Mb/s for a two-wavelength and a three-wavelength fanout, respectively.
Multiple-wavelength vertical-cavity surface-emitting InGaAs QW laser (MW- VCSEL) arrays are fabricated using two patterned-substrate growth techniques both in conjunction with a location-resolvable in situ laser reflectometer in a molecular beam epitaxy (MBE) system. A backside pattern on the substrate is used to induce a temperature profile on the growth surface. In the first technique, we used a temperature-dependent growth rate to create MW-VCSEL's, whereas for the second, uniform growth was first performed followed by a temperature-dependent redesorption process to create the thickness gradient required for MW-VCSEL's. We achieved a record wavelength span, accurate and repeatable lasing wavelengths, and reproducible multiple-wavelength VCSEL arrays with high performance. Comparison between the two methods will be discussed.
Microcavity-induced lasing threshold reduction and modulation of the spontaneous emission coherence length with cavity length in an external-cavity resonant-periodic-gain, surface-emitting laser is reported. In contrast to comparing different epitaxial growths, external-cavity operation allows changing the cavity length without affecting material properties as well as arbitrarily long resonator lengths. The transition to the macrocavity domain is observed by extending the cavity length beyond the spontaneous emission coherence length. The maximum change in the spontaneous emission rate induced by the cavity QED effect in the presence of resonant periodic gain is calculated. As expected, for cavities longer than several wavelengths, microcavity Fabry-Perot resonance effects dominate over cavity QED in determining the cavity-normal spontaneous emission power and coherence length. A simple model of the cavity-normal spontaneous emission coherence length and spontaneous emission power emitted from a Gaussian source placed in an ideal Fabry-Perot cavity is consistent with our observations.
We report that the polarization of the emission of an optically pumped vertical-cavity surface-emitting laser (VCSEL) is sensitive to the polarization state of the pump light. By measuring this memory effect for circularly polarized pump light, we determine the normalized relaxation rate of the carrier spin, /spl Gamma//sub s/, which is a vital parameter in current theoretical models of VCSEL polarization. We find /spl Gamma//sub s/=300/spl plusmn/150, a value which is significantly larger than previously estimated. We also observe a memory effect for the orientation of linearly polarized pump light. This signals that, apart from the carrier spin, the VCSEL polarization is also determined by the carrier momentum.
We have demonstrated a GaAs (311)B vertical-cavity surface-emitting laser (VCSEL) with a threshold current as low as 250 μA, which is the lowest value ever reported for that on non-(100) oriented substrates. Also, the fabricated VCSEL shows a stable polarization state for wide during current ranges and a large polarization-mode suppression ratio over 30 dB between the  and  axis modes at 5 mA. The electrical specific resistance of 1.2×10/sup -4/ /spl Omega//spl middot/cm/sup -2/ at the threshold was reasonably low due to carbon autodoping to AlAs in a p-type distributed Bragg reflector (DBR).
Use of thin oxide apertures placed at an optical node and spatially selective oxidation allow monolithic integration of uniform, ultralow threshold surface- and substrate-emitting VCSEL's on a single epitaxial wafer for free-space interconnect systems.
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