Publications

The transmitter proper comprises a crystalcontrolled radio-frequency exciter unit, delivering an output of 500 W to the modulated amplifier, with a complete duplicate: an audio-frequency exciter un

We discuss extensions to the Session Initiation Protocol (SIP) to enable a rich set of services between the cellular Public Switched Telephone Network (PSTN) and the Internet.

In the design of digital communication links, various reasons exist for the removal of low-frequency components during or prior to transmission of a pulse train.

O N l i important problem which frequently arises in wave-lilter design is that of obtaining a terminal wave-filter impedance which is approximately a constant resistance at all frequencies in the

Wavelength insensitive operation of a Fabry-Perot laser integrated with a Mach-Zehnder modulator is demonstrated in an external fibre grating configuration from 1540 to 1560 nm.

Wavelength insensitive operation of a Fabry-Perot laser integrated with a Mach-Zchnder modulator is demonstrated, in an external fibre grating configuration from 1540 to 1560nm.

We report for the first demonstration of long period gratings (LPG) written in a novel air-clad fiber.

A new instrument has been designed, built, and tested for high performance Fourier transform ion cyclotron resonance mass spectrometry which allows operation at gas pressures of up to ~20 torr in t

High-brightness single laser diodes based on the taper design have demonstrated output powers of a few watts with a single transverse mode operation.

An external-cavity laser using an integrated two-segment design allows broad and continuous wavelength tuning with independent control of power and wavelength.