Study of a low cost robust external cavity based speckle free diode laser – PhD Scholarship

Study of a low cost robust external cavity based speckle free diode laser

Astudiaeth laser deuod ceudod allanol cadarn cost isel heb unrhyw frychau


Project ID: 21869


PhD wedi’i gyllido yw hwn, sy’n cynnwys cyflog hael a ffioedd dysgu, gydag amgylchiadau sydd â digon o adnoddau ar gyfer ysgoloriaeth lwyddiannus. This is a funded PhD, including a generous stipend and tuition fees, with well-resourced circumstances for a successful scholarship.

Here is an exciting opportunity to study new methods of laser beam shaping which could lead to entirely new approaches in enhancing laser illumination for applications such as machine vision, metrology, and projection imaging.

The selected candidate will apply their optical simulation/experimentation skills and ambition to explore underlying physics of diode lasers with external optical feedback and their potential applications. The training and research will allow the student to develop transferable knowledge and skills in this most exciting and active field of photonics research.

This Knowledge Economy Skills Scholarship (KESS) project will be held in the Faculty of Computing, Engineering and Science at the University of South Wales. KESS is a programme funded by the European Social Fund (ESF) awarded by the Welsh European Funding Office (WEFO) in the Welsh Government. The project will focus on designing a diode laser with enhanced laser beam uniformity which can be transferred to a range of industries, from materials testing to biomedical, manufacturing to quality control.

The project is backed by Global Laser Ltd, who is a specialist designer and manufacturer of laser diode modules covering a wide range of applications, including Machine Vision, Alignment, Medical, Measurement, Positioning, Scientific and Military. The factory of Global Laser Ltd is located in an attractive area of South Wales close to the Brecon Beacons National Park and covers 9500 sq/ft of engineering laboratories, machine shops and a substantial production floor space operated by highly trained employees who have in excess of 50 years electro-optics experience.

Programme of research:

Laser speckle noise can produce inaccuracies in many laser based metrological applications due to the characteristically high temporal coherence exhibited in laser diodes (relative to that of broadband sources e.g. LEDs, SLEDs, incandescent lamps, etc). SLEDs were introduced to the illumination market to reduce speckle whilst maintaining a controllable laser-like beam, but exhibit limitations such as low output power and high cost.

In this research, the selected candidate will explore the optical feedback impact to the coherence of the diode laser using an external cavity scheme to reduce the speckle noises. Optical feedback of laser light into the laser diode has been used for enhancing the qualities of the laser in terms of its spectral linewidth but under some circumstances the linewidth can be extremely broadened which is known as coherence collapse (chaos). The candidate is expected to look into the phase and frequency modulation caused by the feedback injection through theoretical simulations and experimentations with aims to finally achieve a low cost robust speckle free laser diode for applications such as machine vision, projection, metrology etc. The candidate will be based within the Wireless and Optoelectronics Research and Innovation Centre (WORIC) group at the University of South Wales.


Ysgoloriaeth ymchwil:


Bydd yr ysgoloriaeth ymchwil yn cynnwys ffioedd ar gyfer rhaglen PhD llawn-amser am flwyddyn ac yn talu cyflog o oddeutu £14k y flwyddyn. Mae hefyd tua £9k o gostau cymorth ar gael i’r prosiect ar gyfer treuliau, teithio, mân offer, hyfforddiant (gan gynnwys Ysgol Raddedig KESS) a mynychu cynadleddau.


Mae’r swydd ar gael Ebrill 2020.


The studentship will cover the fees for a full-time PhD programme and pay a stipend of circa £14k p.a. There is also around £9k project support costs available for consumables, travel, minor equipment, training (including the KESS Grad School) and conference attendance.


The position is available from April 2020.


Cymhwyster Myfyrwyr:

I fod yn gymwys i gael ysgoloriaeth ymchwil KESS, mae’n rhaid:

·        cael cyfeiriad cartref yn yr ardal Dwyrain Cymru (manylion isod)* ar adeg cofrestru.

·        bod gennych hawl i ymgymryd â gwaith cyflogedig yn yr ardal Dwyrain Cymru* ar ôl cwblhau’r ysgoloriaeth.

·        bod y Brifysgol yn eich ystyried yn fyfyriwr ‘cartref’ neu ‘UE’ at ddibenion ffioedd dysgu yn unol â chanllawiau’r Brifysgol.

·        eich bod yn bodloni meini prawf mynediad Prifysgol De Cymru: gweler isod, cymwysterau a phrofiad a’r broses ymgeisio


*Dwyrain Cymru ardal yn cwmpasu:  Bro Morgannwg / Caerdydd / Casnewydd/ Sir Fynwy/ Powys/ Wrecsam/ Sir Y Fflint


Eligibility of Student:

To be eligible to hold a KESS studentship, you must:

·        have a home address in East Wales area (details below)* at the time of registration.

·        have the right to take up paid work in the East Wales area* on completion of the scholarship.

·        be classified by the University as ‘home’ or ‘EU’ for tuition fees purposes according to the University’s guidelines.

·        satisfy University of South Wales’s admissions criteria: see below, qualifications and experience and application process



*East Wales area covers:  Vale of Glamorgan / Cardiff/ Newport/ Monmouthshire/ Powys/ Wrexham/ Flintshire


Cymwysterau a phrofiad:

Bydd gan ymgeiswyr cymwys:

Qualifications and experience:

Eligible applicants will:


  • Have a degree (2i or higher) in an appropriate Engineering, Physics, Lasers & Optics or Photonics discipline
  • Possess a reasonable understanding of physics of diode lasers
  • Be highly self-motivated, with capacity to learn and develop laser techniques
  • Have well-developed and positively collaborative interpersonal skills
  • Have an ability to deliver technical reports and communicate findings
  • Be willing to travel and work in industrial settings


Y Broses Ymgeisio:


I lawrlwytho’r pecyn ymgeisio, ewch i:  Pecyn Ymgeisio Cyfranogwr


Am unrhyw ymholiadau ynghylch cymhwysedd, cysylltwch â:  Tîm KESS, Gwasanaethau Ymchwil ac Arloesedd, Prifysgol De Cymru: Ffôn: 01443 482578


Ar gyfer ymholiadau anffurfiol neu ragor o wybodaeth am y rhaglen, cysylltwch â: Professor/ Dr Ali Roula (


Rhagor o wybodaeth:



Application Process:


To download an application package, please visit: specific funded studentships:


For any queries on eligibility, please contact:  KESS Team at Research and Innovation Services, University of South Wales:  Tel: 01443 482578


For informal enquiries or further programme information, please contact: Dr Ali Roula (


Further information at:




Dyddiad cau ar gyfer ceisiadau: Hanner nos Dydd Sul 9 Chwefror 2020

Cynhelir cyfweliadau yn ystod yr wythnos yn dechrau (i’w gadarnhau)


Closing date for applications: midnight Sunday 9th February 2020

Interviews will be held w/c (TBC)


Mae Ysgoloriaethau Sgiliau Economi Gwybodaeth (KESS) yn fenter sgiliau lefel uwch ar draws Cymru a arweinir gan Brifysgol Bangor ar ran y sector AU yng Nghymru. Fe’i cyllidir yn rhannol gan raglen Cronfa Gymdeithasol Ewropeaidd (ESF) Llywodraeth Cymru ar gyfer Dwyrain Cymru. Knowledge Economy Skills Scholarships (KESS) is a pan-Wales higher-level skills initiative led by Bangor University on behalf of the HE sector in Wales. It is part funded by the Welsh Government’s European Social Fund (ESF) programme for East Wales.



*USW reserves the right to close the vacancy if sufficient applications are received before the deadline/

Mae PDC yn cadw’r hawl i gau’r swydd os derbynnir nifer digonol o geisiadau cyn y dyddiad cau