XY1 Optoelectronic sensing technology for applications in gas ...

XY1 Optoelectronic sensing technology for applications in gas monitoring
and non-invasive detection of diseases.
There is an increasing demand for real time gas monitoring and detection in
biomedical, environmental and industrial applications using optoelectronic sensor.
The photonic based sensing technology offers sensors with relative immunity to
electromagnetic interference, weight savings and safety improvement as the
detector does not need to directly interact with the sensed material. The sensors are
completely passive and only the sample cell and related components are directly
exposed to the material.
In this project we propose to use optoelectronic sensors for applications in gas
monitoring and non-invasive detection of diseases. We target to design high
sensitive and robust sensor for air pollution monitoring, hazard gas leak detection,
and biocheminstry parameter moniotring. The project involves several key
experimental aspects including gas cell design, optical source design, circuit design
sensor implementation and system integration. Simulation software will be
provided during the project.
Students required: 3~4
Assumed knowledge: ELEC3404 Electronic circuit design or ELEC3405
Communication Electronics and Photonics
XY2 Optically controlled phased array antenna.
Phased array antennas have attracted great interests due to their capability to
provide much flexibility that is difficult to achieve with non array antenna systems.
The use of optics to control phased array antenna compares favourably with
conventional electronics in terms of loss, weight, size, bandwidth, and
susceptibility to electromagnetic interference. The key component for optically
controlled phased array antenna is the photonic beam forming network which
provides individual control of phase and magnitude for each of the array elements.
The project focuses on the techniques to establish adaptive photonic beam forming
network which is capable of supporting RF signals within a wide bandwidth, with
large coverage and strong robustness. Optical techniques to achieve time delay and

phase control will be investigated in the project. Investigation of optimal
configurations of photonic beam forming network will also be involved with the
consideration of new optical devices and subsystems.
Industry-standard simulation software maybe provided during the project.
Students required: 2
Assumed knowledge: ELEC2302 Signals and Systems, ELEC3405
Communication Electronics and Photonics or ELEC5511 Optical Communication
Systems
XY 3 (Engineering Project ELEC 5220/5221, Honours Thesis ELEC 4712/4713)
Fiber optic sensing technology for monitoring the civil engineering structures
To ensure the safety of buildings, bridges, railways and to make their maintenance
more effective and efficient, there is a growing interest of using new technologies
for structure health monitoring. Fiber optic sensing technology has superior
advantages over traditional techniques, which opens up new applications not
previously possible. Fiber optic sensors can be used for harsh environment as they
are immune to electromagnetic interference. They also have the remote sensing
ability as optical light can transmit information several kilometres from the point
of sensing. Additionally, using various spectral and interferometric techniques, fibe
sensors can achieve very high sensitivities.
In this project we will apply fiber optic sensors for accurate and precise detection
of crack damage in civil structures. Various approaches used fiber optic sensors
will be studied and evaluated in the project. The project involves several key
aspects including data acquisition, signal processing, and measurement. Simulation
software and experimental facilities will be provided during the project.
It is a joint project between School of Aerospace, Mechanical and Mechatronic
Engineering (Prof Lin Ye), and School of Electrical and Information Engineering
(Dr Xiaoke Yi).
Students required: 2
Assumed knowledge: ELEC2302 Signals and Systems, or ELEC3404 Electronic
circuit design or ELEC3405 Communication Electronics and Photonics.