El principio de libertad personal y la libertad de procrear

Journal Publications

High speed synchronously pumped Raman fibre amplification,

K. C. Byron, D. Bums, R. S. Grant, G. T. Kennedy, C. I. Johnston and W. Sibbett, Electron. Lett. 27,597 (1991).

Cross-phase modulation in a semiconductor optical amplifier, R. S. Grant, G. T. Kennedy and W. Sibbett,

Electron. Lett. 27,801 (1991).

Ultrafast all-optical switching in GaAlAs integrated interferometer in 1.55 pm spectral region, K. Al-hemyari, J. S. Aitchison, C. N. Ironside, G. T. Kennedy, R. S. Grant and W. Sibbett Electron. Lett. 28,1090 (1992).

Amplitude noise reduction of a coupled-cavity mode-locked NaCl:OH~ colour centre laser by active synchronisation,

G. T. Kennedy, R. S. Grant and W. Sibbett, Opt. Lett. 18,208 (1993).

Carrier lifetimes in MBE and MOCVD InGaAs quantum wells,

J. E. Erlich, D. T. Neilson, A. C. Walker, G. T. Kennedy, R. S. Grant, W. Sibbett and M. Hopkinson, Semicond. Sci. Tech. 8,307 (1993).

All-optical modulation with ultrafast recovery at low pump energies in passive InGoAsHnGaAsP multiquantum well waveguides,

H. K. Tsang, P. A. Snow, I. E. Day, I. H. White, R. S. Grant, Z. Su, G. T. Kennedy and W. Sibbett, Appl. Phys. Lett. 62,1451 (1993).

Appendix 3 Publications 147 Ultrafast nonlinear refraction in an active MQW waveguide,

M. A. Fisher, H. Wickes, G. T. Kennedy, R. S. Grant and W. Sibbett, Electron. Lett. 29,1185 (1993).

Coupled-cavity mode locking using passive semiconductor waveguides, R. S. Grant, G. T. Kennedy, W. Sibbett and J. S. Aitchison,

To be published Opt. Lett 18,1st October (1993). Self-mode-locked NaCliOfT color-center laser, G. T. Kennedy, R. S. Grant and W. Sibbett,

Accepted for publication in Optics Letters August 1993.

Nonlinear switching in InGaAsP laser amplifier directional couplers biased at transparency,

D. A. O. Davies, M. A. Fisher, D. J. Elton, S. D. Perrin, M. J. Adams, G. T. Kennedy, R. S. Grant, P. D. Roberts and W. Sibbett,

Accepted for publication in Electronics Letters August 1993.

Optical bistability in an InGaAsHnP multiple quantum well waveguide Fabry-Perot cavity,

J. E. Ehrlich, D. T. Neilson, A. C. Walker,G. T. Kennedy, R. S. Grant, W. Sibbett and M. Hopkinson, Accepted for publication in Applied Physics Letters July 1993.

Sub-milliwatt optical bistability in a coated InGaAslInP multiple quantum well waveguide Fabry-Perot cavity,

D. T. Neilson, J. E. Ehrlich, P. Meredith, A. C. Walker, G. T. Kennedy, R. S. Grant, P. D. Roberts, W. Sibbett and M. Hopkinson,

Accepted for publication in Electronics Letters, July 1993.

Conference Publications

Soliton compression and pedestal suppression using a nonlinear fibre loop mirror, G. T. Kennedy, D. Bums, R. S. Grant, W. Sibbett and K. C. Byron,

Paper PDIO, European Quantum Electronics Conference, Edinburgh, August 1991.

Nonlinear optical properyies of a GaAS/GaAlAs integrated asymmetric Mach-Zehnder interferometer, C. N. Ironside, K. Al-Hemyari, J. S. Aitchison, G. T. Kennedy, R. S Grant and W. Sibbett,

OSA Topical Meeting on Integrated Photonics, Houston, April 1992. ! Time-domain evidence for spectrl hole burning in an InGaAsP optical amplifier, |

R. S. Grant, G. T. Kennedy and W. Sibbett,

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Appendix 3 Publications 148

Amplitude stabilisation of a coupled-cavity mode-locked NaCl:OH~ color-center laser, G. T. Kennedy, R. S. Grant and W. Sibbett,

Paper CTu60, Conference on Lasers and Electro-Optics, Anaheim, May 1992. Ultrafast switching in AlGaAs waveguide devices,

J. S. Aitchison, K. Al-Hemyari, C. N. Ironside, A. Villeneuve, G. I. Stegeman, G. T. Kennedy, R. S. Grant and W. Sibbett,

Paper Th03 (invited), OSA Annual Meeting, Albuquerque, September 1992.

Low-loss ultrafast all-optical switching in a GaAlAs integrate inteiferometer at half the bandgap, K. Al-Hemyari, J. S. Aitchison, C. N. Ironside, G. T. Kennedy, R. S. Grant and W. Sibbett, Paper Th05 , OSA Annual Meeting, Albuquerque, September 1992.

Ultrafast nonlinear refraction in an active MQW waveguide, M. A. Fisher, H. Wickes, G. T. Kennedy, R. S. Grant and W. Sibbett,

Paper PWA2, OSA Topical Meeting on Photonics in Switching, Palm Springs, March 1993. All-optical switching in AlGaAs waveguides at 1.55 pm,

J. S. Aitchison, K. Al-Hemyari, C. N. Ironside, A. Villeneuve, G. I. Stegeman, G. T. Kennedy, R. S Grant and W. Sibbett,

Invited paper, European Conference on Integrated Optics, Neuchatel, April 1993. Self-mode locking of a NaCl. OH- color-centre laser,

G. T. Kennedy, R. S. Grant, J. M. Evans and W. Sibbett,

Paper CThS82, Conference on Lasers and Electro-Optics, Baltimore, May 1993. Self-mode locking ofaNaCl:OH~ colour-centre laser,

G. T. Kennedy, R. S. Grant and W. Sibbett,

Paper, Eleventh National Quantum Electronice Conference (QE 11), Belfast, August 1993. Coupled-cavity mode locking using passive AlGaAs waveguides,

Z. Su, R. S. Grant, G. T. Kennedy, J. S. Aitchison and W. Sibbett,

Paper, Eleventh National Quantum Electronice Conference (QE 11), Belfast, August 1993. Mode-locking usng the half-bandgap nonlinearity in passive AlGaAs waveguides,

Z. Su, R. S. Grant, G. T. Kennedy, W. Sibbett and J. S. Aitchison,

Paper MA3 ,OSA Topical Meeting on Nonlinear Guided-Wave Phenomena, Cambridge, September 1993.

Appendix 3 Publications 149

Low-loss ultrafast all-optical switching in a GaAlAs integrated interferometer at the 1.55 pm spectral region without multiphoton absorption,

K. Al-hemyari, J. S. Aitchison, C. N. Ironside, G. T. Kennedy and W. Sibbett,

Paper MA5, OSA Topical Meeting on Nonlinear Guided-Wave Phenomena, Cambridge, September 1993.

Optically-induced electronic nonlinearities and passive optical bistability in InGaAslInP QW waveguides at 1.5 pm,

D. T. Neilson, J. E. Ehrlich, A. C. Walker, G. T. Kennedy, R. S. Grant, W. Sibbett, M. Hopkinson and M Pate,

Paper TuC3 ,OSA Topical Meeting on Nonlinear Guided-Wave Phenomena, Cambridge, September 1993.

High speed low power switching of a polarisation rotation gate using AlGaAs MQW waveguides, P. A. Snow, I. E. Day, I. H. White, R. V. Penty, G. T. Kennedy and W. Sibbett,

Paper TuC5, OSA Topical Meeting on Nonlinear Guided-Wave Phenomena, Cambridge, September 1993.

Femtosecond pulse generation using passive AlGaAs waveguides at half the bandgap Z. Su, R. S. Grant, G. T. Kennedy, J. S. Aitchison and W. Sibbett,

150 Acknowledgements

I would like to thank my supervisor, Professor W ilson Sibbett for encouragement, support and cheerful optimism throughout this project. I am indebted to my CASE supervisor Dr Kevin Byron for providing the fibre-loop devices (Chapter!).

I am also grateful to:

Robert Grant for help in the laboratory, Dave Bums for many late-night discussions,

Jonny Evans for help with self-mode-locking the NaCl:OH' laser, Bill Sleat for his electronic expertise,

all the other members of the 'W Squad',

and The boys of 172 South St.: Gordon, Jason, Neil and Jonny.

I am especially grateful to Lisa Bethel for proof reading this thesis, and sorting out my dangling modifier.

Thanks are due to all the members of the technical staff of the Physics Department, in particular:

Bob Mitchell for his cryogenic skills,

Andy Barman for providing a constant supply of liquid nitrogen, Reg Gavine for instruction in the student workshop,

Jimmy Lindsay and other members of the Mechanical Workshop for constmcting numerous mounts.

Finally I am grateful to the Science and Engineering Research Council for financial support.