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We demonstrate the high resolution beam steering of a highly dispersive VCSEL-based amplifier. By using p-type GaAs substrate, the uniform current injection was carried out for 1mm long device and we obtained the maximum deflection angle of 33° and a beam divergence angle of 0.08° resulting in resolution points of over 300.
We demonstrate the high-resolution beam-steering and amplification of novel VCSEL amplifiers, exhibiting beam steering of over 25° and sharp beam divergence of 0.1°. The output power reaches at 29mW with a chip gain of 18dB.
We fabricated 850 nm transverse-coupled-cavity VCSELs using 3-inch full wafer process. The modulation bandwidth enhancement was observed in a wide temperature range over 120K thanks to an optical feedback in the coupled cavity. The result shows a possibility of high-speed VCSELs without any temperature and bias control.
We demonstrate a novel wavelength demultiplexer based on VCSEL amplifier structure, which offers demultiplexing and amplification functions simultaneously. Thanks to its high resolution beam steering operation, a wavelength resolution of 0.07nm was obtained. Also, a 1 mm-long device exhibited the maximum linear gain of 28dB and saturation power of 23dBm.
We demonstrate an ultra-compact photo-detector integrated VCSEL with laterally coupled two cavities. Output power and photo current show a similar tendency under wide temperature changes. The device could be used for monitoring the output power without a conventional photo detector mounted separately.
Modern life science automation combines laboratory automation systems and mobile transportation systems. The distributed automated workstations integrate different kinds of automatic devices to increase the throughput and quality. The mobile transportation system manages mobile robots and human laboratory assistants for transfer services between interacting automation systems. In order to combine...
A low power, small form-factor, 60-GHz radio with beam switching capability is presented. The 3mm×3mm radio IC in 32nm SOI CMOS includes the TX and RX RF front ends, mixers, basebands, PLL and LO chains. The package comprises 2 TX antennas and 2 RX antennas producing low directivity beams in two orthogonal directions to maximize spatial coverage, with an achieved angular coverage of 254°. In board...
A novel high speed (sub-gigahertz) and large deflection angle (>30°) beam switching in transverse-mode coupled cavity VCSEL is proposed and demonstrated. The record-high angular switching speed of 1.3×1011 °/s is achieved with narrow beam divergence of below 4° and extinction ratio of 8 dB.
We demonstrate a compact vortex beam emitter laterally integrated with VCSEL for OAM mode multiplexing. The device generates an azimuthally polarized vortex beam from a ring-shape waveguide laterally connected with an electrically pumped 980nm VCSEL.
Multiferroic materials are one kind of material which couples two or more of the properties of (anti) ferromagnetism, ferroelectricity, and ferroelasticity together. The coupling between the magnetic and ferroelectric order parameters may lead to the magnetoelectric effect, in which the magnetization may be controlled by an electric field, or vice versa. Multiferroic materials are currently one of...
Sr2RuO4 is a typical p-wave superconductor due to it is in close proximity to magnetic instability, which exhibits incommensurate antiferromagnetic (AFM) fluctuations. Doping with transition metal in Sr2RuO4, such as Ti, Mn, Co, etc., may evolve into static, short-range AFM order. Orbital dependent magnetism is also detected in element replacing for Sr in Sr2RuO4, such as Ca2xSrxRuO4 and Sr2 La RuO...
We report on a novel 18-TW peak power light source delivering pulses with 80-mJ energy and 4.5-fs duration. The system is based on optical parametric synthesizer principle involving multi-color optical parametric chirped pulse amplification stages.
This paper reports a hemodialysis error taxonomy system for not only providing a framework to analyze characteristics of hemodialysis incidents, but also estimating safety status in a dialysis organization. The error taxonomy system was developed by adapting a common health care error taxonomy system to hemodialysis situations. Based on the results of its application to 1,909 incident reports collecting...
Retrieving the location of a mobile device by matching a query image to a database of geo-tagged imagery is one popular application of content-based image retrieval (CBIR). Standard CBIR-based approaches exploit appearance features of the environment for the matching process. Many locations, however, are characterized by distinct structural (geometric) features. We investigate whether a standard appearance-based...
We report on the development and relevant characteristics of an optical parametric synthesizer light source delivering sub-5-fs pulses with 80 mJ energy. The first applications of the system are attosecond and relativistic laser-plasma physics.
The endeavour of generating shorter and shorter light pulses lead to the optical parametric chirped pulse amplification (OPCPA) technique, which provides considerable broader gain bandwidth corresponding to a pulse duration of one to three optical cycles. Systems with such a short duration and multi-terawatt to petawatt power levels provide a unique tool for attosecond [1] and laser-plasma physics...
We present breakthrough pulse energy performance (up to 300 μJ) from monolithic fiber-optic femtosecond laser systems that are developed for industrial materials processing. Whereas previous chirped pulse amplification (CPA) systems have implemented fiber-optic gain elements within free-space oscillator-amplifier circuits [1-3], we present monolithic fiber-optic CPA systems — where the mode-locked...
Wireless sensor network (WSN) is gaining popularity in condition monitoring (CM) fields. However, enormous datasets obtained by data acquisition systems with high sampling rate cannot be transmitted effectively via a WSN due to its limited transmission speed. This may lead to the loss of significant information for condition monitoring and fault diagnosis, hence affecting the accuracy of diagnostic...
A dual-wavelength Tm3+:ZBLAN fibre laser operating around 1480 nm is demonstrated. A linear cascaded cavity with bidirectional upconversion pumping at 1064 nm was used; alternate single wavelength and dual-wavelength operation is achieved by simple adjustment of the pump powers. A wavelength spacing of only 0.6 nm is obtained for dual-wavelength operation.
We describe femtosecond fiber laser systems optimized for high value applications in precision industrial micro-machining. Unprecedented system performance and reliability enable unique manufacturing capabilities for touch screen displays and other difficult-to-machine parts.
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