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Photonics-based millimeter and terahertz wave generation using a hybrid integrated dual DBR polymer laser

: Carpintero, G.; Hisatake, S.; Felipe, D.D.; Guzman, R.; Nagatsuma, T.; Keil, N.; Gobel, T.


Lin, J. (Ed.) ; Institute of Electrical and Electronics Engineers -IEEE-:
IEEE MTT-S International Microwave Symposium, IMS 2016 : 22- 27 May 2016, San Francisco, California, USA
Piscataway, NJ: IEEE, 2016
ISBN: 978-1-5090-0698-4
ISBN: 978-1-5090-0699-1
International Microwave Symposium (IMS) <2016, San Francisco/Calif.>
Fraunhofer HHI ()

The generation of high frequency signals into the terahertz range is dominated by photonics-based systems pushing the development of ultra-broadband wireless communication links. Recently, photonic integrated circuits have been proposed to implement different photonic signal generation techniques offering different semiconductor laser structures. Here we present for the first time a dual wavelength source for optical heterodyning based on hybrid integration of active InP elements and thermo-optically tunable polymer waveguide structures. The chip integrates two external cavity lasers, each with an InP gain chip coupled to a polymer phase and Bragg gratings sections, combined with a Y-junction. Each laser has a wavelength tuning range over 20 nm, enabling the generation of signals from tenths of GHz up to several THz with MHz resolution. We demonstrate the generation of a 330-GHz free-running beat-note has a linewidth of few MHz ( â¼3 MHz).