The implementation of a 10-channel parallel optical interconnect consisting of a two-dimensional array of vertical-cavity surface-emitting lasers, a 1.35-m fiber image guide, and a metal-semiconductor-metal receiver array is described. Transmission rates of 250 Mbits/s per channel are demonstrated with an optical cross talk of less than -27 dB and a loss of -3 dB. Coupling issues associated wit...

An axion detector consisting of a tunable high-Q cavity, a superconducting magnet, and a superheterodyne receiver with an ultra-low noise pre-ampli"er has been built to search for galactic halo axions in the mass range of 1.3}13 leV. The detector instrumentation, search process, and data analysis are described. For the "rst time, this class of detector has reached su$cient sensitivity to detect...

Integrated path concentrations of ambient levels of carbon dioxide and methane have been measured during nighttime periods at NIST, Boulder (CO, USA), using a ground-based, eyesafe laser system. In this contribution, we describe the transmitter and receiver system, demonstrate measurements of CO2 and CH4 in comparison with an in situ point sensor measurement using a commercial cavity ring-down ...

Chaotic synchronization characteristics of external cavity semiconductor lasers with phase-conjugate feedback and its application to optical cryptograph communication are investigated numerically. The results indicate that the range of feedback coefficient making the system well synchronized is related to the bias current of the semiconductor laser. The robustness of the synchronization scheme ...

1. Abstract This paper presents two approaches developed at the Australian National University for modelling the transient response of a parabolic dish steam cavity receiver. Both approaches are based on a heat transfer model for a cylindrical pipe using a moving-boundary formulation, and feature the ability to model multiple phase flow that changes dynamically. A model simulation is implemente...