PhD candidate on lasers dynamics for fiber sensor interrogation

1 - Working at the VUB

For more than 50 years, the Vrije Universiteit Brussel has stood for freedom, equality and solidarity, and this is very much alive on our campuses among students and staff alike. 

At the VUB, you will find a diverse collection of personalities: innovators pur sang, but above all people who are 100% their authentic selves. With some 4,000 employees, we are the largest Dutch-speaking employer, in the private sector, in Brussels; an international city with which we are only too happy to connect and where (around) our 4 campuses are located. 

Add to this our principle of free research - in which self-reflection, a critical attitude and an open, creative mind around scientific and social issues are central - and you have a university that is fundamentally groundbreaking and pioneering in education and research. In short: the VUB all over again. 

Moreover, the VUB is a member of EUTOPIA, an alliance of like-minded European universities, all ready to reinvent themselves.

2 - Position description

The Faculty of Engineering, Department Applied Physics and Photonics, is looking for a PhD-student with a doctoral grant. 

More concretely your work package, for the preparation of a doctorate, contains: 

• The construction of an experimental setup for the precise generation of ultrasonic guided waves.
• The exploration of diverse strategies for interrogating optical fibers utilizing the intricacies of laser dynamics.
• To perform a rigorous benchmark of the most promising strategies with a focus on sensitivity and speed against established techniques to ascertain performance enhancements.
• Collaboration with a second doctoral researcher to optimize the architecture of fiber sensors, fostering synergistic innovation and breakthrough advancements.

Optical fiber-based sensing stands as a cornerstone measurement and detection technology across diverse fields and disciplines, showcasing remarkable efficacy in applications ranging from structural health monitoring in civil engineering to biomedical sensing in healthcare. The detection of ultrasonic guided waves using optical fibres, which could be key enabling for structural health monitoring of aerospace structures, has so far remained out of reach. A breakthrough in terms of sensitivity and detection speed is required. To address this,  we have already explored and successfully demonstrated fiber sensing by ways of laser dynamics. Owing to the fast response time and high-sensitivity of the laser itself, we believe that this approach holds potential for significant advancements in fiber sensor interrogation.   

 
This doctoral project will take place in the frame of project LADYBIRD, funded by the Research Foundation of Flanders (Fonds Wetenschappelijk Onderzoek, FWO). The aim is to put experiment with and investigate the relevance of laser dynamics-based approaches for fiber sensing and apply the technique to the detection of ultrasonic guided waves. In this context, we are looking for an excellent PhD candidate in photonics (duration = 48 months) to join our team.

The candidate will join the Brussels Photonics (B-PHOT) research group of the Vrije Universiteit Brussel (VUB) in Belgium, www.b-phot.org. Chaired by Prof. H. Thienpont, the team composed of more than 45 internationally recognized researchers is widely known for its work in fundamental and applied photonics research covering the entire research cycle from modelling and fabrication, to characterization and Proof-Of-Concept. In the last 20 years, the group has built significant expertise in the field of optical fiber sensing applied to real-life and industrial applications, and in the field of semiconductor laser – including modelling, design and on-chip implementation of new laser structures – but also in nonlinear dynamics and chaos-based applications. The candidate will therefore have the opportunity to contribute to these fields in a multidisciplinary setting.  

For this function, our Brussels Humanities, Sciences & Engineering Campus (Elsene) will serve as your home base. 

3 - Profile

What do we expect from you?

• Candidates should possess a master’s degree in Electrical Engineering, Physics, Photonics, Applied Math or related scientific field. Interest in photonic system and light technology are necessary. 

  Candidates that have not yet acquired their master’s degree can apply and participate in the selection procedure, but need to offer proof of registration in their Masters programme and need to have complied with all diploma requirements before starting their position at VUB.

• Knowledge and experience: 

  • Knowledge about photonics, photonic integration, sensing, laser physics, nonlinear dynamics or signal processing is a strong plus;
  • Good programming skills are a strong plus. Experience with Matlab, Python or a similar language and environment is a plus. Depending on the skills of the candidate, training can be arranged in the first year of the PhD;
  • Good knowledge of numerical techniques and advanced simulation methods is a plus;
  • Knowledge of photonic circuit simulation tools such as Lumerical FDTD and Interconnect or Photon Design OmniSim and PICWave is a plus;
  • Experience with experimental optical setup and equipment such as optical fiber sensors, fiber interrogators, optical spectrum analysers, laser drivers or amplifiers is a plus;
  • The candidate is expected to be able to carry out the research activities independently and in a critical manner, whilst having excellent communication skills and a positive attitude towards collaboration;
  • Good time management skills are a must, along with the ability to meet tight deadlines and work efficiently under pressure;
  • Proficiency in both spoken and written English (typically CEFR level C1 or equivalent) is required. The candidate will have the opportunity to take evening English classes to improve his/her language skills if needed;
  • The candidates should be prepared to travel in Europe and potentially worldwide e.g. for participation in conferences or research stays at partner institutions.

   

  The available PhD position has a normal duration of 4 years in Belgium. The progress of the PhD candidate is evaluated every year.

  The candidate is expected to endorse the educational vision of the university.

• You have not performed any works in the execution of a mandate as an assistant, paid from operating resources, over a total (cumulated) period of more than 12 months.

• As a (non-)EEA national, meet the conditions for obtaining a valid permit for VUB and comply with the VUB residence requirements. More info here.

The VUB wants to be a reflection of the society where everyone's talent is valued, regardless of gender, age, religion, skin color, migration background, disability and neurodiversity.

4 - Offer

Are you going to be our new colleague?

You’ll be offered a full-time PhD-scholarship, for 12 months (extendable up to max. 48 months, on condition of the positive evaluation of the PhD activities), with planned starting date 01/05/2026. 

You’ll receive a grant linked to one of the scales set by the government.

IMPORTANT: The effective result of the doctorate scholarship is subject to the condition precedent of your enrolment as a doctorate student at the university.

At the VUB, you’re guaranteed an open, involved and diverse workplace where you are offered opportunities to (further) build on your career.

As well as this, you will also enjoy various other benefits:

• Extensive homeworking options, a telework allowance of 50 euros per month OR an internet fee of 20 euros per month;
• An open and informal working environment where attention is paid to work-life balance, and exceptional holiday arrangements with 35 days of leave (based on a fulltime contract), closure between Christmas and New Year and 3 extra leave days;
• Cost-free hospitalisation insurance;
• Full reimbursement of your home-to-work commute with public transport according to VUB-policy, and/or compensation if you come by bike; 
• A wide selection of meals in our campus restaurants at attractive prices;
• Excellent and affordable facilities for sport and exercise, a range of discounts via Benefits@Work (in  all kinds of shops, on flights, in petrol stations, amusement parks...) and Ecocheques; 
• Nursery near campus, discount on holiday camps; 
• The space to form your job content and to continuously learn through our VUB learning platforms and training courses;
• And finally: great colleagues with a healthy drive.

5 - Interested?

Is this the job you’ve been dreaming of?

Then apply, at the latest on 01/03/2026, via jobs.vub.be, and upload the following documents:

• your CV;
• your motivation letter;
• your diploma (not applicable for VUB alumni).

Our application process is as follows (subject to change):

• step 1: an initial selection based on your application file; 
• step 2: a job interview.

Do you have questions about the job content? Contact Martin Virte at martin.virte@vub.be or on +32 2 629 34 53.

Would you like to know what it’s like to work at the VUB? Go to jobs.vub.be, and find all there is to know about our campuses, benefits, strategic goals and your future colleagues.

Would you like more information about EUTOPIA? Go to eutopia-university.eu, and read more about the role of the VUB in the development of the EUTOPIA alliance.