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Manipulation of the Phase-Amplitude Coupling Factor in Quantum Nanostructure Based Devices for On-Chip Chirp Compensation & Low-Cost Applications

january 2012 – december 2014

Development of a method for amplitude-phase coupling control in quantum dot lasers

Context
The phase-amplitude coupling factor also known as the αH–factor has a great importance for semiconductor lasers, as it is one of the main features that distinguishes their behavior with respect to other types of lasers. The αH–factor influences several fundamental aspects of diode lasers, such as the chirp under current modulation, the linewidth, the sensitivity to optical feedback and the occurrence of filamentation in broad–area devices. The nonlinear dynamics of semiconductor lasers is greatly influenced by the αH–factor, which is of particular interest for the study of injection phenomena and optical feedback effects. This research project aims to provide the building blocks for the realization of a device with a controllable and highly variable αH–factor. The manipulation of the αH–factor will be obtained by using quantum nanostructure (QN) materials coupled to optical injection.

Goals
This research project aims to provide the building blocks in order to achieve a controllable and a highly variable αH-factor in QN based lasers. The proper combination of enhanced nonlinear effects arising from the nanostructures associated to the beauty of the nonlinear dynamic provided with the injection-locking technique will allow a fine control of this key-parameter. Final goal of the research project will be to demonstrate that the manipulation of the αH parameter can lead to a compact and integrated on-chip product in order to obtain chirpless high-speed transmissions. Injection-locking studies in QN diode lasers will be conducted both under forward and backward configuration. The impact of the injection direction influence on the variations of the αH–factor, on the noise and on the laser’s dynamical properties will be analyzed in both FP and DFB QN based lasers.

Fallouts
- PHC with TUB
- collaboration with Polito (Turin) and New Mexico University

Major Results
- Appl. Phys. Lett. 105(22) 221114 (2014) [hal-01091745]
- IEEE J. Quantum Electron. 50(9) 723–731 (2014) [hal-01076769]
- IEEE J. Select. Topics Quantum Electron. 19 1900812 (2013) [hal-00827670]

Partners
USAF – Telecom ParisTech
(Foton groups : Simulation)

Coordinator
Foton (Frédéric GRILLOT)

Funding
USAF