Research

I am a Forrest Fellow in the International Centre for Radio Astronomy Research where I am working on developing laser systems for high-precision measurement and high-bandwidth communications between spacecraft and ground stations.

Previously, I was a Postdoctoral Fellow in the Department of Quantum Science at the Australian National University, as part of the Centre of Excellence for Engineered Quantum Systems. I worked on developing  optical phased arrays and other laser systems for metrology and communication.

My PhD research involved the development of stabilized reference frequency transfer systems for the Square Kilometre Array telescope. Stabilized transmission systems are required to synchronize the thousands of radio antennas in the array to the ultra-high precision required for them to act together as one giant telescope, and be able to peer deeper into the cosmos than ever before, allowing astronomers to study the first stars and galaxies that formed in our universe.

You can read about my PhD research here, or listen to me talking about my work on 3-Minute Thesis, ABC Radio National, and The Naked Scientists.

Publications

• Gozzard, D. R., Spollard, J. T., Roberts, L. E., Sibley, P. G. & Shaddock, D. A. (2020). Optical vortex beams with controllable orbital angular momentum using an optical phased array. OSA Continuum.
• Gozzard, D. R., Roberts, L. E., Spollard, J. T., Sibley, P. G. & Shaddock, D. A. (2020). Fast beam steering with and optical phased array. Opt. Lett.
• Dix-Matthews, B. P., Schediwy, S. W., Gozzard, D. R., Driver, S., Schreiber, K. U., Carmann, R. & Tobar, M. (2020). Methods for coherent optical Doppler orbitography. JoG.
• Schediwy, S. W., Gozzard, D. R., Gravestock, C., Stobie, S., Whitaker, R., Malan, J. A., Boven, P. & Grainge, K. (2019). The Mid-Frequency Square Kilometre Array Phase Synchronisation System. PASA
• Gozzard, D. R., Schediwy, S. W., Stone, B., Messineo, M. & Tobar, M. (2018). Stabilized free-space optical frequency transfer. PRApp
• Gozzard, D. R., Schediwy, S. W., Wallace, B., Gamatham, R. & Grainge, K. (in prep). Stabilized modulated photonic signal transfer over 186 km of aerial fiber.
• Gozzard, D. R., Schediwy, S. W., Whitaker, R. & Grainge, K. (2018). Simple stabilized radio-frequency transfer with optical phase actuation. IEEE PTL.
• Gozzard, D. R., Schediwy, S. W. & Grainge, K. (2018). Simultaneous transfer of stabilized optical and microwave frequencies over fiber. IEEE PTL.
• Gozzard, D. R., Schediwy, S. W., Dodson, R., Rioja, M., Hill, M., Lennon, B., McFee, J., Mirtschin, P., Stevens, J. & Grainge, K. (2017). Astronomical verification of a stabilized frequency reference transfer system for the Square Kilometre Array. AJ.
• Gozzard, D. R., Schediwy, S. W., Wallace, B., Gamatham, R. & Grainge, K. (2017). Characterization of optical frequency transfer over 154 km of aerial fiber. Opt. Lett.
• Schediwy, S. W., Gozzard, D. R., Stobie, S. Malan, J. A. & Grainge, K. (2017). Stabilized microwave-frequency transfer using optical phase sensing and actuation. Opt. Lett.
• Grainge, K., Alachkar, B., Amy, S. et al. (2017). Square Kilometre Array: the radio telescope of the XXII century. Astron. Rep.
• Gozzard, D. & Schediwy, S. (2015). Stabilized frequency transfer for the Square Kilometre Array. Journal of the Royal Society of Western Australia.
• Schediwy, S. W., Gozzard, D. Baldwin, K. G. H. Orr, B. J. Warrington, R. B. Aben, G. & Luiten, A. N. (2013). High-precision optical-frequency dissemination on branching optical-fiber networks. Opt. Lett.

Invited talks and colloquia

Slides for my invited talks and colloquia are available here.

• Stabilized frequency transfer for radio astronomy and space science – Australian Centre for Liquefied Natural Gass Futures (July 2020)
• Stabilized frequency transfer for radio astronomy and space science applications – University of Western Australia, Perth (Apr 2018)
• Stabilized frequency transfer for the SKA – CSIRO Australia Telescope National Facility colloquium, Marsfield (Feb 2017)

Media releases

• Moon to Earth: WA to host space communications station
• Synchronisation System Designs Chosen For SKA Telescopes
• ICRAR researchers’ precision on point
• Synchronization System Designs Chosen for SKA Telescopes
• What to do when your atomic clock just isn’t accurate enough
• Australian Researchers Have Developed Ultra-Accurate Synchronisation Tech for Largest Telescope
• West Australian Innovation Could Save SKA Millions

Technical reports and other research output

• Schediwy, S. W., Gozzard, D. R., (2018). SAT.STFR.FRQ (UWA) Detail Design Report, SKA-TEL-SADT-0000390, Square Kilometre Array Organization.
• Gozzard, D. R., (2016). Notes on calculating the relationship between coherence loss and Allan deviation, Memo, SKA-TEL-SADT-0000619, Square Kilometre Array Organization.
• Gozzard, D. R. & Schediwy, S. W., (2016). STFR.FRQ.UWA astronomical verification, Tech. Rep. SKATEL-SADT-0000524, Square Kilometre Array Organization.
• Schediwy, S. W. & Gozzard, D. R., (2015). UWA South African SKA site long-haul overhead fibre field trial report, Tech. Rep. SKA-TEL-SADT-0000109, Square Kilometre Array Organization.