项目介绍

2025年5月15日

We are seeking a talented and motivated young researcher to join our team as a PhD student and tackle the exciting scientific challenges of our open position. The project is primarily experimental, complemented by numerical modeling, and will be carried out within the “Fiber Optics, Devices, and Nonlinear Effects” group at DTU Electro. 

As a PhD student, you will be part of a dynamic research environment with strong expertise in the design, characterization, and application of optical fibers supporting higher-order modes. You will also benefit from close collaboration and synergies with other ongoing projects in the group, as well as interdisciplinary activities across the department, all centered on advancing the understanding and application of higher-order mode propagation in optical fibers.

Responsibilities and qualifications
The basic principle of a laser is to convert low utility pump beams into a coherent high quality laser beam, referred to as brightness enhancement. Fiber lasers are often the preferred solution compared to bulky tabletop, as fiber lasers provide high beam quality, high repetition rate, and narrow spectral linewidth. One shortcoming of fiber lasers is the limited available wavelength regions, since brightness enhancement is typically realized by doping the fibers with certain rare-earth elements, offering lasing around 1, 1.5, and 2 µm. In the proposed project you will develop a new platform based on higher order modes and the Raman effect to demonstrate high-power fiber lasers and amplifiers at arbitrary wavelength. The project will among others consist of the following:

• Numerical simulation of multimode Raman interaction
• Mode excitation in optical fibers
• Characterize the modal purity of a multimode Raman amplifier
• Develop and implement spatial mode filters 
• Demonstrate brightness enhancement in a higher order mode Raman fiber laser

You must have a two-year master’s degree (120 ECTS points) or a similar degree with an academic level equivalent to a two-year master’s degree.

Approval and Enrolment 
The scholarship for the PhD degree is subject to academic approval, and the candidate will be enrolled in one of the general degree programmes at DTU. For information about our enrolment requirements and the general planning of the PhD study programme, please see DTU’s rules for the PhD education. 

We offer
DTU is a leading technical university globally recognized for the excellence of its research, education, innovation and scientific advice. We offer a rewarding and challenging job in an international environment. We strive for academic excellence in an environment characterized by collegial respect and academic freedom tempered by responsibility.

Salary and appointment terms
The appointment will be based on the collective agreement with the Danish Confederation of Professional Associations. The allowance will be agreed upon with the relevant union. 

The period of employment is 3 years. The expected starting date is 1 September 2025.

You can read more about career paths at DTU here.

Further information
Further information may be obtained from Lars Rishøj, DTU Electro, lris@dtu.dk.  

You can read more about DTU Electro at www.electro.dtu.dk. 

If you are applying from abroad, you may find useful information on working in Denmark and at DTU at DTU – Moving to Denmark. Furthermore, you have the option of joining our monthly free seminar “PhD relocation to Denmark and startup “Zoom” seminar” for all questions regarding the practical matters of moving to Denmark and working as a PhD at DTU. 

Application procedure 
Your complete online application must be submitted no later than 15 June 2025 (23:59 Danish time). applications must be submitted as one PDF file containing all materials to be given consideration. To apply, please open the link “Apply now”, fill out the online application form, and attach all your materials in English in one PDF file. The file must include:

• A letter motivating the application (cover letter)
• Curriculum vitae 
• Grade transcripts and BSc/MSc diploma (in English) including official description of grading scale

You may apply prior to ob­tai­ning your master’s degree but cannot begin before having received it. 

Applications received after the deadline will not be considered.

All interested candidates irrespective of age, gender, disability, race, religion or ethnic background are encouraged to apply. As DTU works with research in critical technology, which is subject to special rules for security and export control, open-source background checks may be conducted on qualified candidates for the position.

Technology for people
DTU develops technology for people. With our international elite research and study programmes, we are helping to create a better world and to solve the global challenges formulated in the UN’s 17 Sustainable Development Goals. Hans Christian Ørsted founded DTU in 1829 with a clear mission to develop and create value using science and engineering to benefit society. That mission lives on today. DTU has 13,500 students and 6,000 employees. We work in an international atmosphere and have an inclusive, evolving, and informal working environment. DTU has campuses in all parts of Denmark and in Greenland, and we collaborate with the best universities around the world.