Optical Telecommunications - 4Virtual room: Photons Canada - 4
|Thursday, May 28|
OT-4-28-1 / Progress in quantum dot lasers and single photon sources
* Yasuhiko Arakawa, The University of Tokyo, Japan
Since we proposed semiconductor quantum dots (QDs) in 1982, the QDs have been intensively studied for both fundamental solid-state physics and advanced device applications. The quantum-confinement of electrons in QDs has enabled the realization of high-performance quantum lasers, high-sensitivity quantum dot infrared detectors, and advanced non-classical light sources. Moreover, embedding a single quantum dot inside a photonic nanocavity has provided a new platform for studying solid-state cavity quantum electronics (cavity-QED). In this presentation, we overview recent progress in quantum dot photonics, including practical implementation of quantum dot lasers and realization of single photon sources operating above room temperature. Impact of quantum dot light sources for silicon quantum integrated photonics is also discussed.
OT-4-28-2 / Millimeter-Wave Analog Radio-over-Fiber Fronthaul Systems using Optical Heterodyning
* Liam Barry, Dublin City University, Ireland
Amol Delmade, Dublin City University
Colm Browning, Dublin City University
In mm-wave systems, carrier phase noise limits the performance of analog multi-carrier signal transmission required for enhanced mobile broadband. This work outlines some of the key enabling technologies to be used in conjunction with optical heterodyning to achieve the performance requirements for future mm-wave radio-over-fiber based beyond 5G networks
OT-4-28-3 / Addressing the Challenges in V2X Visible Light Communications
* Xavier Fernando, Ryerson University, Canada
Visible Light Communications (VLC) is gaining momentum for vehicular communication with the availability of abundant bandwidth and inherent short-range confinement. However, outdoor vehicular VLC systems are exposed to multitude of challenges such as, rapidly varying channel conditions, highly directional property of light rays and the high ambient noise interference, especially from the Sun. Unipolar nature of intensity modulated VLC systems precludes directly adopting many wireless signal processing solutions. We have been investigating number of solutions in Ryerson Communications Lab to overcome these challenges.
OT-4-28-4 / Silicon photonic modulator loaded by NPN junctions
* Omid Jafari, Université Laval, Canada
Wei Shi, Université Laval
Sophie LaRochelle, Université Laval
We experimentally demonstrate an asymmetric Bragg grating modulator with a phase shifter length of 240 μm, loaded by p-n junctions. The mode conversion by the asymmetric sidewall grating allows us to operate a Bragg modulator in reflection without a circulator. Simulation results show that there is room for improving the modulator efficiency and footprint by exploiting NPN junctions instead of p-n junctions.
OT-4-28-5 / On-Chip Talbot-based Repetition-rate Multiplier
* Saket Kaushal, INRS-EMT, Canada
Jose Azana, INRS-EMT
We experimentally demonstrate 2×pulse repetition-rate multiplication of a 10-GHz pulse train by Talbot effect using waveguide Bragg grating based on-chip dispersive phase filters in silicon.
OT-4-28-6 / Temperature-dependent Gain Characteristics of InAs/InP Quantum Dash Semiconductor Optical Amplifiers
* Guocheng Liu, National Research Council Canada, Canada
Shurui Wang, National Research Council Canada
Zhenguo Lu, National Research Council Canada
Jiaren Liu, National Research Council Canada
Daniel Poitras, National Research Council Canada
Mohamed Rahim, National Research Council Canada
Pedro Barrios, National Research Council Canada
Weihong Jiang, National Research Council Canada
Grzegorz Pakulski, National Research Council Canada
Philip J. Poole, National Research Council Canada
This paper presents an InAs/InP quantum dash (QD) semiconductor optical amplifier (SOA) operating between S- and C-bands. By using this QD-SOA we systematically investigate the gain characteristics under different temperature conditions. The peak value of the gain factor decreases linearly with the temperature. It demonstrate a peak fiber-to-fiber gain of 13.35 dB. This provide insight toward the application of QD-SOAs to the field of signal amplification and signal processing for all-optical optical networks.