Performance characterisation of 42.65 Gbit/s dual-gate asynchronous digital optical regenerator using single MZM

The tolerance of a 42.65 Gbit/s dual-gate asynchronous digital optical regenerator using a single Mach-Zehnder modulator to optical signal-to-noise-ratio degradation and chromatic dispersion is experimentally demonstrated

40 Gbit/s asynchronous digital optical regenerator

We present the first experimental demonstration of an asynchronous digital optical regenerator at 42.67 Gbit/s. The system effectively retimes incoming asynchronous data bursts to a local clock without burst mode clock recovery and converts the signal to a desired wavelength and duty cycle

Optical TDM transport network technologies

EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Specific primary ionisation for electrons, protons and alpha particles incident on water

In order to correlate damage induced by ionising radiation in biological systems on the cellular or subcellular level with physical parameters characterising the radiation, extensive use has been made of the parameter linear energy transfer (LET). Its main limitation is that depending on the ionising particle and its energy, a substantial amount of the particle's energy is not deposited locally but it is carried away from the track of the particle by energetic secondary electrons called delta rays. A physical parameter which does not suffer from this limitation is the number of primary ionisations produced by an ionising particle per unit pathlength in an irradiated medium. This parameter is called specific primary ionisation (SPI) and its usefulness in reporting results of radiobiological experiments has already been pointed out (Cannel and Watt 1985, Watt 1985). The author calculates SPI in water for particles that are used in radiobiological experiments, using recent cross section data. The results are presented in tables so that they can be easily used by interested radiobiologists