Millimetre-wave signal generation and modulation using DFB laser integrated on glass.

ESR:Nisrine Arab

 

Nisrine ARAB was born in Lebanon in 1991. She received two master’s degrees in physics from the Lebanese university (LASER’s Medical and Industrial applications, Lebanon) and the University of Science and Technology in Lille (Light and matter, France). She is currently working in the European project FIWIN5G as an early stage researcher (ESR), and this will allow her obtaining a PhD. Her work is done between two universities and an industry, Grenoble–INP in IMEP-LAHC laboratory in France, Universidad Carlos 3 de Madrid in Spain, and the TEEM Photonics industry in France. The main goals of her work are the design, realization and characterization of co-integrated DFB lasers on glass substrate used for millimeter wave generation.

 

Advanced communication systems will use carriers at higher frequencies than nowadays in order to transmit information at very high bit rate. Such frequencies in the millimetre range (60 GHz and higher) have some limitations explaining why we didn’t use them before: the generation is more complex than at low frequencies, some frequency ranges are strongly absorbed (60 GHz range), they can hardly been transmitted through electrical cable without high losses. To overcome these problems, optical solutions can be employed. We already explored different techniques using optical modulation or multimode model-locked lasers combined with detection systems adapted to these problems.

This Position is to investigate co-integrated DFB lasers on glass substrate used for MMW generation as a low cost option. They have a big potential, since their ultra-high coherence and low noise were already demonstrated within previous European projects. Our goal here is the integration of two laser waveguides on the same glass substrate and in a precise management of both laser phase and wavelength stability suitable for 60-100 GHz generation, with final emitting wavelength at 1550 nm. The bottlenecks to be solved are:

    • 1. Accurate control of the laser wavelength difference (design and fabrication of different cavities with frequency difference ranging from 4 GHz to 100 GHz):
    • 2. Design ofwaveguide and laser cavity in order to optimize the stability
    • 3. Study of environment sensitivity.

This work will be realized through a partnership between:

  • IMEP-LAHC laboratory, for the design and characterization of the lasers (Grenoble - France),
  • TEEM Photonics, an SME in charge of the realization of the device (Grenoble-France),
  • UC3M Laboratory, for system demonstrations at high bit rates using complex modulations (Madrid –Spain)

Host University: G-INP

Secondment: UC3M

Industrial Partner: TEEM Photonics