44 research outputs found
Recommended from our members
Phase control and measurement of ultrashort optical pulses
We have used the Direct Optical Spectral Phase Measurement (DOSPM) technique to characterize the cubic phase tuning ability of our pulse stretcher. We have compared the measured phase to the phase determined from cross-correlation measurements
Picosecond and femtosecond Fourier pulse shape synthesis
We review our work on the synthesis of arbitrarily shaped, coherent optical pulses, by spatial filtering in a grating pulse compressor. We describe picosecond pulses shaped using a fiber and grating pulse compressor and femtosecond pulses shaped using a nondispersive grating compressor. The discussion includes generation of coherent square pulses and abruptly phase-modulated « odd » pulses, two slit temporal interference measurements of the optical phase spectrum, and ultrashort pulse encryption and decoding by phase scrambling. We conclude with a proposal for an ultrafast optical self-routing switch based upon frequency domain phase coding of ultrashort pulses.Nous passons en revue la synthÚse d'impulsions optiques cohérentes de forme arbitraire par filtrage spatial dans un compresseur d'impulsions à réseau. Nous décrivons des impulsions picosecondes mises en forme au moyen d'un compresseur d'impulsions à fibre et à réseau ainsi que des impulsions femtosecondes mises en forme au moyen d'un compresseur à réseau non dispersif. La discussion concerne la génération d'impulsions carrées cohérentes et d'impulsions « impaires » abruptement modulées en phase, des mesures par interférence temporelle à deux fentes du spectre de phase optique ainsi que l'encodage d'impulsions ultracourtes et le décodage par brouillage de phase. Nous concluons par une proposition d'interrupteur auto-directif optique ultrarapide basé sur le codage en phase dans le domaine des fréquences d'impulsions ultracourtes
Recommended from our members
Propagation of 2.5 Gb/s Asynchronous, Concurrent, Optical CDMA Signals Through a 214 Kilometer Fiber Optic Link
The propagation of optical Code Division Multiple Access (CDMA) signals was studied by computer simulation. Group velocity dispersion produces the worst impairment. With dispersion management, the decoder successfully recovers the signals, even in the presence of severe multi-access interference
Impact of transmission impairments on the teletraffic performance of wavelength-routed optical networks
Post-Roman pottery from excavations in Colchester, 1971-85
SIGLEAvailable from British Library Document Supply Centre-DSC:3295.590(7) / BLDSC - British Library Document Supply CentreGBUnited Kingdo