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A millimetre wave phase shifter using a 40GHz hybrid mode locked laser

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Original languageEnglish
Title of host publication4th IEEE International Conference on Emerging Technologies 2008 (ICET 2008), Rawalpindi, Pakistan
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Pages87 - 91
Number of pages5
ISBN (Print)9781424422111, 9781424422104
StatePublished - Oct 2008
Event4th International Conference on Emerging Technologies - Rawalpindi, Pakistan


Conference4th International Conference on Emerging Technologies
Period1/10/08 → …


In this paper, electrical injection locking of a mode-locked laser is used to create a millimetre wave phase shifter. The phase shift is measured directly using a vector network analyzer enabling straightforward characterization of such systems. Both magnitude and phase of the modulation response are measured and for sufficiently high RF input power a ldquoplateaurdquo is observed in the magnitude response which corresponds to the locking range of the system. Phase shifts of greater than 90deg are observed and such devices could have applications in millimetre wave radio-over-fibre phased array antenna systems.

Additional information

Rose publication type: Conference contribution Sponsorship: The Author Bilal A. Khawaja would like to acknowledge National University of Science and Technology (NUST), Pakistan for providing PhD. funding. Terms of use: Copyright © 2008 IEEE. Reprinted from 4th International Conference on Emerging Technologies, 2008 (ICET 2008). This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Research areas

  • component, injection locking, mode-locked laser, illimetre wave, phase shifter, radio-over-fibre, phased array antenna systems


4th International Conference on Emerging Technologies

Duration1 Oct 2008 → …

Event: Conference

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