Fronties of Optics

14 October 2013

University of Sydney School of Physics teams led by Dr David Marpaung and PhD student Mr Yvan Paquot, from the Australian Research Council Centre of Excellence for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS), has been selected to present two prestigious post deadline papers at the Frontiers in Optics meeting organised by the Optical Society of America. The team's submissions were chosen from a highly competitive field.

From Left to right: Mr Blair Morrison, Professor Ben Eggleton, Dr David Marpaung, Dr Mark Pelusi, Dr Jochen Schroeder, Yvan Paquot. The CUDOS team and the photonics chip
From Left to right: Mr Blair Morrison, Professor Ben Eggleton, Dr David Marpaung, Dr Mark Pelusi, Dr Jochen Schroeder, Yvan Paquot. The CUDOS team and the photonics chip

One paper will present the team's ongoing contribution to on-chip optical signal processing. In this case the team has demonstrated a massive reduction in the latency, or time delay, in signal processing by 1000 times, by using combined reconfigurable optical circuits and photonic chip processing.

Detection and correction of mistaken data is a critical function in information systems. Current systems employ error management techniques based on advanced electronic digital signal processing, which can identify and correct errors introduced by transmission impairments. However, these systems come at a cost, increased latency, which is the time it takes a signal to pass through the systems. This paper presents a solution for ultra-low latency systems, such as data centres or the finance and security networks, where the time-of-flight is a crucial issue. The solution demonstrated by the CUDOS researchers allows for error detection with latency reduced by two orders of magnitude.

"It isn't about how much data we send, that's easy, it is about how quickly and accurately we can get it," said team member and CUDOS Project Leader Dr Jochen Schroeder.

"This is beautiful science, with a direct application" said Mr Paquot.

The second paper will present a photonic chip-based Radio Frequency filter with performance and efficiency that massively exceeds current capability available in electronics.

Removing unwanted signals is a key function in wireless radio communications. Using photonics technology for radio signal filtering is attractive in terms of flexibility. However, photonic filters can be limited in suppression and can consume a lot of power. With a new optical signal processing technique, the team has enabled a filter that can remove unwanted signal with 1000 times more suppression with 50 times less power compared to state-of-the-art photonic filters, therefore more efficiency and more functionality one a single photonic chip.

"The technological breakthrough here is to make low-power nanophotonic devices useful for real-life applications in radio communications." said Dr Marpaung

"This is an enabling technique, with high efficiency and high impact," said team member and PhD student Mr. Blair Morrison.

"We have filed patents to cover these inventions and look forward to developing these devices". Professor Benjamin Eggleton, Director of CUDOS.

The post deadline papers to be presented by CUDOS PhD students Yvan Paquot and Blair Morrison at the Frontiers in Optics Meeting in Orlando, Florida:

  • A tunable RF photonic notch filter with record 55 dB suppression using Sub-1 dB on-chip Brillouin gain.
  • On-chip all optical error detection for ultra-low latency communications.

These breakthroughs and more research and technology will also be presented at the CUDOS Showcase a first of its kind event on 22 November at the Australian Technology Park.

Read more about CUDOS research and the showcase

Contact: Tom Gordon

Phone: 02 9351 3201

Email: 31072e460a3624000e36761c311c0c341b54162a3367582c