Recent research has been conducted in the area of optoelectronic interconnection and packaging technology in order to proliferate the feasibility of extremely high bandwidth and low latency optoelectronic “multi-chip modules” (OE-MCMs). Our group’s contribution to this area involves the use of rigid fiber bundle image guides serving as both interconnect and packaging for such a module. Our demo...

Pipelines are efficient, highly reliable and safe means of transportation. However, despite intensive right of way surveillance by foot, car and out of the air, pipeline leaks and illegal tappings are a reality – sometimes with catastrophic results. These events show a gap in real-time monitoring caused by the highly distributed nature of pipelines. Parts of this gap now can be closed with dist...

Phosphors based on magnesium titanate activated with Mn 4 + ions are of great interest because, when excited with blue light, they display a strong red-emitting luminescence. They are characterized by a luminescence decay which is strongly temperature dependent in the range from -50 ∘ C to 150 ∘ C, making these materials very promising for temperature sensing in the biochemical field. In this w...

Pipelines are efficient, highly reliable and safe means of transportation. However, although the number of leaks could be reduced since the early 70’s of the last century due to improved design and maintenance procedures as well as improved materials, leaks still appear. Most of these are originated by external causes such as digging excavators or slope movements despite intensive pipeline righ...

AN OPTIC FIBER SENSOR FOR PARTIAL DISCHARGE ACOUSTIC DETECTION by Xiaodong Wang Partial discharge (PD) is a very common problem in operating power transformers and is one of the factors that could lead to failure of power transformers, leading to power outage and expensive repairs. The acoustic wave induced by PD can be measured and used for monitoring, diagnosing, and locating potential failur...

Recent developments in fiber-optic sensing have involved booming research in the design and manufacturing of novel micro-structured optical fiber devices. From the conventional tapered fiber architectures to the novel micro-machined devices by advanced laser systems, thousands of micro-structured fiber-optic sensors have been proposed and fabricated for applications in measuring temperature, st...

A transflective nano-wire grid polarizer is fabricated on a single mode fiber tip by focused ion beam machining. In contrast to conventional absorptive in-line polarizers, the wire grids reflect TE-mode, while transmitting TM-mode light so that no light power is discarded. A reflection contrast of 13.7 dB and a transmission contrast of 4.9 dB are achieved in the 1,550 nm telecom band using a 20...

ponents based on wavelength-division multiplexing (WDM) technology is increasing rapidly. But many sales opportunities are missed because manufacturers can’t assemble these devices fast enough. This has led to a worldwide shortage in commercially available fiber-optic WDM components. The problem is mainly due to a lack of fully automated production lines in the optoelectronic device manufacturi...

Environmental Engineering Science, W. M. Keck Laboratories, California Institute of Technology, Pasadena, CA 91125 The design and testing of a solar-powered fiber-optic cable reactor prototype for the photocatalytic destruction of organic pollutants is presented. A concentrating collector directs sunlight into a fiber-optic cable which transmits light to a Ti02 photocatalyst immobilized on the ...