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PHTN4662 Photonic Networks
Laboratory Program
T2 2025
From Week 2 on, we will work on lab experiments onsite. Laboratory is carried out in groups of both onsite and online students. There will be four experiments to be completed by each student – one experiment in each laboratory period. The experiments are:
Expt.1 Optical Fibre Device Characterisation - Fibre Bragg Grating
Expt.2 Optical Transmission - Erbium Doped Fibre Amplifier
Expt.3 Optical Transmission System - Performance Evaluation
Expt.4 Optical Transmission System - Wavelength Division Multiplexing
The laboratory schedule for each group is as follows:
Your lab schedule is linked to both lab session and lab group:
School of Electrical Engineering & Telecommunications
PHTN4662 Photonic Networks
Laboratory Notes
Laboratory work is fundamental to your study of this course. You are required to attend laboratory classes which will be conducted in rooms EE324.
The experiments can be completed easily in the time scheduled. To achieve this, though, it is essential to complete the preparation before you arrive at class, so that you know what you will be measuring. Prepare your laboratory notebook beforehand.
Lab Staff
Manager Ms Lucy Chen, EEG15, [email protected]
Demonstrator Mr Zhaoyu Xie, EE422, [email protected]
Demonstrator Ms Qinqing Han, EE402, [email protected]
Demonstrator Mr Guanghao Li, EE402, [email protected]
1. Laboratory preparation
The experiments can be completed in the time scheduled easily if you do laboratory preparation properly. This means that all group members:
1. Go through relevant files in the lab section on Moodle (lab experiment notes, equipment manuals, and lab videos, etc) and understand
lab objectives,
experiment system and operating principles,
roles and operations of the equipment and devices involved,
experimental tasks and procedures – know what the group need to do and look for
2. Based on item 1 above, discuss and assign specific lab tasks / responsibilities among all group members.
2. On-site lab mode
All lab experiments are converted back to fully onsite mode from this term. All experimental parts are to be completed with on-site experimental processes.
3. Laboratory Safety
Engineering laboratories are potentially dangerous places, and the consequent rules regulating behaviour apply in the photonics laboratories, as they do elsewhere in the School. These standard rules are on the noticeboard and can be read at various UNSW websites.
These rules are related to generic risks.
Additionally, there are further rules pertaining to the photonics teaching laboratories associated with three specific hazards requiring special precautions.
Lasers:
Some experiments make use of a laser as a source of light. At times you may even use wavelengths not visible to human eyes, i.e. in the infra-red. Laser radiation can damage your eyes, even when invisible.
Never look into a laser.
Always ensure that your laser-beams are terminated, with a suitably nonreflective surface. Check this is the case.
Be careful to prevent accidental reflections that may send the laser beam where it was never intended to go.
Always keep any metallic objects (e.g. watches, rings, pens) and your hands, too, out of the beam.
Whenever possible, arrange the experiment so that you are not working with lasers at eye-height. In this course, this has been done.
Unattended lasers must be switched off.
Risk assessment form:
At the end of this hand-out is a form which must be completed, signed, and handed to your laboratory demonstrator before you may begin any experimental work in this course. The bottom section will be detached and returned. Then this smaller part (effectively your “license”) must be glued inside the front cover of your laboratory notebook and available for inspection any time you are in the labs. (The forms of both students working in a given pair may be glued into the same book, if you keep only one book.)
Broken glass:
When you work with silica-fibres, you are working with very thin pieces of glass. These are sharp and can enter the skin even more easily than a hypodermic. Be careful. They are also very hard to see. All off-cuts must be disposed of correctly, into the yellow waste containers provided. Be aware that fragments of glass may be present on any surface (floor, bench-tops, shelves, etc) in the rooms, so look before resting your hand, elbow, etc (another reason for the law about footwear).
4. Laboratory Notebooks
One complete, formal notebook needs to be kept by each student. The records for your experimental work should be sufficiently complete and clear that a technically competent person could replicate your experiment to see how you reach your conclusions. The following points may help you with this.
Scraps of paper must not be used for recording results at the bench. All results must be recorded directly into your laboratory notebook.
The notebook should contain a diagram of the experimental set-up used to obtain the measurements.
The notebook should detail any specific hazard associated with the experiment and the precautions taken as a consequence.
Each experiment should commence on a new page with a title, the date and the aims of the experiment.
When drawing graphs, numerical scales must be shown together with a label and units for each axis. Every graph must have a complete title and a statement of any special measurement conditions that apply.
Results should only be recorded to engineering precision.
All physical quantities should have units recorded.
Results must be recorded in ink. Pencils are only allowed for sketching curves on graphs. Additionally, liquid-paper must not be used. Any mistakes should be crossed out.
5. Laboratory Assessment
Laboratories are primarily about learning, and the laboratory assessment is designed mainly to check your knowledge as you progress through each stage of the laboratory tasks. You will be awarded a laboratory mark for this course. It will constitute 20% of your final assessment. Additionally, satisfactory completion of the laboratory program is a necessary requirement for a pass in this course.
It is essential that you complete the laboratory preparation before coming to the lab. You are required to write the aim of the experiment and draw the circuit diagram if any in your lab book. This will be verified and signed by your demonstrators in the lab. You will be recording your observations/readings in your lab book first and then completing and submitting the results sheet before leaving the lab.
Laboratory assessment is based on
Lab preparation
Understanding of lab purposes and procedures
Professional manner and practice in lab experiments
Overall attendance, participation and contribution in lab experiments
Lab tasks completed and quality as reflected in the written lab reports
You must submit a written report for each experiment that you perform. These reports will be marked and available a week later. Individual reports are to be submitted by each student. Each report must have a completed and signed cover-sheet.
6. Other Matters
1. All must be aware that engineering labs are potentially dangerous places and all the notes on risks must be carefully read, whether or not you are present in laboratory physically. Students' behaviour must conform at all times to the rules applying to the School's laboratories. Please pay attention to the documents and videos for the labs on all OHS issues. Also, when conducting your experiments you will need to be aware of any specific hazards (e.g. sharp materials) associated with them. Students are responsible for their own conduct and for the safety of themselves, others and lab equipment.
2. Lab related questions will be included in the final examination as part of the course assessment.
3. You are required to know the School's and University's policies about students' responsibilities, academic & other misconduct, special consideration, conduct of examinations, and the submission & assessment of assignments. You can find these at http://www.eet.unsw.edu.au/.