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A torsional structure for monolithical laser beam steering is proposed. The steering part of the device is a torsional actuator and an edge emitting laser is integrated to the torsional beam. The device steers the laser beam in the... more
A torsional structure for monolithical laser beam steering is proposed. The steering part of the device is a torsional actuator and an edge emitting laser is integrated to the torsional beam. The device steers the laser beam in the direction perpendicular to the substrate. Index Terms — Optoelectronic devices, optical networks, DWDM systems, optical MEMS, laser display, optical switch.
Page 1. Low Drift and High Sensitivity Fiber Optic Gyroscope Using Tunable VCSEL as Optical Source Carlos FR Mateus, Member, IEEE, Camila D. Sardeto and Carmem Lúcia Barbosa Instituto de Estudos Avançados IEAv/CTA Rod. ...
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The polarization isolation of birefringent fiber half-couplers is locally observed and characterized when the device is submitted to the various steps of its fabrication. After stripping and aligning the fiber, the polarization is not... more
The polarization isolation of birefringent fiber half-couplers is locally observed and characterized when the device is submitted to the various steps of its fabrication. After stripping and aligning the fiber, the polarization is not affected. The mode coupling rises to the order of -40 dB after cementing and -20 dB after polishing. When the substrate is released from the jig,
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Page 1. Design of Ultra-Wide Continuously Tunable Optical Filter Using Sub-Wavelength Grating Reflectors Michael CY Huang, Carlos FR Mateus, Karen Lee, Devang Parekh, and Connie J. Chang-Hasnain Department of Electrical ...
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Page 1. Harsh Environment Temperature and Strain Sensor Using Tunable VCSEL and Multiple Fiber Bragg Gratings Carlos FR Mateus, Member, IEEE, and Carmem Lúcia Barbosa Instituto de Estudos Avançados IEAv/CTA Rod. ...
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Measurements of polarization cross-coupling in a polarization-maintaining fiber (3M FS-PM-6621) under two coiling situations are carried out by optical coherence domain polarimetry. In the first situation, it is coiled around a 25.4 mm... more
Measurements of polarization cross-coupling in a polarization-maintaining fiber (3M FS-PM-6621) under two coiling situations are carried out by optical coherence domain polarimetry. In the first situation, it is coiled around a 25.4 mm diameter piezoelectric tube and the applied voltage is increased from 0 to 900 V. In the second, the fiber is tension-coiled around a 24.6 mm diameter passive
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Page 1. Modeling of' Birefringent Fiber-optic Directional Couplers Carlos FR Mateus, AndrC C. da Silva and JosC EB Oliveira Abstract - Extending a coupled mode theory of directional couplers with parallel step index fibers, an ...
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Page 1. Low Power, High Sensitivity Temperature Sensor Using Fiber Bragg Gratings and VCSEL Carlos FR Mateus, Member, IEEE, and Carmem Lúcia Barbosa Instituto de Estudos Avançados IEAv/CTA Rod. dos Tamoios ...
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We report a label-free, highly sensitive biosensor using a vertical cavity surface emitting laser (VCSEL) based measurement system for the detection and monitoring of biomolecular interactions. The sensor system consists of a VCSEL, a... more
We report a label-free, highly sensitive biosensor using a vertical cavity surface emitting laser (VCSEL) based measurement system for the detection and monitoring of biomolecular interactions. The sensor system consists of a VCSEL, a plastic guided mode resonant (GMR) filter, and two pin detectors. The system has several advantages such as extreme compactness, high sensitivity, high throughput, fast measurements, low
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General design rules and the scaling laws with wavelength for MEMS tunable optical filters are discussed for the first time. We describe how to determine dimensions and component materials from the system requirements such as tuning... more
General design rules and the scaling laws with wavelength for MEMS tunable optical filters are discussed for the first time. We describe how to determine dimensions and component materials from the system requirements such as tuning range, central wavelength, tuning voltage, tuning speed and resolution. The systematic design allows fair comparison among different topologies such as cantilever, bridge and trampoline.
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Page 1. 202 / CLEO 2002 / TUESDAY AFTERNOON I 1 * V CTuKll Fig. 2. the receiver is shown in inset. Circuit diagram of the integrating receiver. Eye diagram for 600 Mbps operation of -a -79 -78 -77 -76 -75 -74 -73 -72 -7 I -7 Power per... more
Page 1. 202 / CLEO 2002 / TUESDAY AFTERNOON I 1 * V CTuKll Fig. 2. the receiver is shown in inset. Circuit diagram of the integrating receiver. Eye diagram for 600 Mbps operation of -a -79 -78 -77 -76 -75 -74 -73 -72 -7 I -7 Power per beam (dBm) CTuKll Fig. ...
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Page 1. Ultra broadband mirror using sub-wavelength grating Carlos FR Mateus1, Michael CY Huang1, Lu Chen2, Yuri Suzuki3 and Connie J. Chang-Hasnain1 1Department of Electrical Engineering and Computer Sciences ...
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Page 1. TuA3.3 (Invited) 2:30 pm - 3:OO pm Ultra Sensitive and Compact VCSEL-Based Biosensor for Detection of Protein Interactions and Dengue Antibodies Carlos F. R. Mateus, Michael C. Y. Huang, Devang Parekh, Connie J. Chang-Hasnain ...
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We describe the behavior of the gas between the electrodes of a capacitive accelerometer with the compressible-gas-film Reynolds equation, which relates pressure, density, viscosity and the surface velocity for the specific geometry of... more
We describe the behavior of the gas between the electrodes of a capacitive accelerometer with the compressible-gas-film Reynolds equation, which relates pressure, density, viscosity and the surface velocity for the specific geometry of bounded film. This equation assumes that inertial forces are small compared to viscous forces, and that the gap is large compared to the mean free path of the gas. Assuming a small displacement of the moving electrode, small pressure variation around the ambient pressure and under the assumption of isothermal film, the analytical solution of the pressure is obtained. The pressure has two terms: one represents the damping and one represents the spring-like behavior of the gas. The integral of the pressure over the electrodes area lead directly to expressions for damping and air spring constant coefficients. The importance of compressible effects, represented by the spring constant coefficient, can be analyzed through of the squeeze number. For a very l...