Journals >Frontiers of Optoelectronics
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2018
Volume: 11 Issue 2
9 Article(s)
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EDITORIAL
A special issue on Photonics Research in Canada
Jianping YAO, and Lawrence R.
Canada has a long standing history of contributions to the field of photonics. Photonics research occurs at a number of universities across the country as well as in government research labs. The Canadian photonics industry includes small start-ups to large scale corporations, many of which are involved in research. ItCanada has a long standing history of contributions to the field of photonics. Photonics research occurs at a number of universities across the country as well as in government research labs. The Canadian photonics industry includes small start-ups to large scale corporations, many of which are involved in research. It is estimated that photonics is a $6 billion industry in Canada that employs more than 24000 people. Photonics clusters can be found in Vancouver, Toronto, Ottawa, Montreal, and Quebec City—cities that are also home to universities where world renowned photonics research takes place. In this special issue, we present a highlight of recent research activities in Canada. Prominent researchers across the country have contributed papers on topics ranging from optical and wireless communications, fiber and integrated technologies, and quantum photonics..
Frontiers of Optoelectronics
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 105 (2018)
RESEARCH ARTICLE
Toward the implementation of a universal angle-based optical indoor positioning system
Mark H., Ferdinand S., Richard KLUKAS, Julian CHENG, and Jonathan F.
There is an emerging market today for indoor positioning systems capable of working alongside global navigation satellite systems, such as the global positioning system, in indoor environments. Many systems have been proposed in the literature but all of them have fundamental flaws that hold them back from widescale imThere is an emerging market today for indoor positioning systems capable of working alongside global navigation satellite systems, such as the global positioning system, in indoor environments. Many systems have been proposed in the literature but all of them have fundamental flaws that hold them back from widescale implementation. We review angle-of-arrival (AOA) and angle-differenceof-arrival (ADOA) optical indoor positioning systems which have been proven to be robust, accurate, and easily implementable. We build an AOA/ADOA optical indoor positioning system out of a simple commercial high-speed camera and white light light emitting diodes (LEDs) which operate over a working area of 1 m3, and compare its performance to other indoor positioning methods. The AOA and ADOA systems achieve positioning with low errors of 1.2 and 3.7 cm, respectively..
Frontiers of Optoelectronics
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 116 (2018)
Franson interferometry with a single pulse
Eric Y., Costantino CORBARI, Alexey V., Peter G., and Li QIAN
In classical optics, interference occurs between two optical fields when they are indistinguishable from one another. The same holds true in quantum optics, where a particular experiment, the Franson interferometer, involves the interference of a photon pair with a time-delayed version of itself. The canonical version In classical optics, interference occurs between two optical fields when they are indistinguishable from one another. The same holds true in quantum optics, where a particular experiment, the Franson interferometer, involves the interference of a photon pair with a time-delayed version of itself. The canonical version of this interferometer requires that the time delay be much shorter than the coherence length of the pump used to generate the photon pair, so as to guarantee indistinguishability. However, when this time delay is comparable to the coherence length, conventional wisdom suggests that interference visibility degrades significantly. In this work, though, we show that the interference visibility can be restored through judicious temporal post-selection. Utilizing correlated photon pairs generated by a pump whose pulsewidth (460 ps) is shorter than the interferometer’s time delay (500 ps), we are able to observe a fringe visibility of 97.44.3%. We believe this new method can be used for the encoding of high-dimensional quantum information in the temporal domain.1).
Frontiers of Optoelectronics
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 148 (2018)
Photonic properties of novel Yb3+ doped germanium-lead oxyfluoride glass-ceramics for laser cooling applications
Lauro J., Jyothis THOMAS, Yannick LEDEMI, Kummara V., Denis SELETSKIY, Younes MESSADDEQ, and Raman KASHYAP
In recent years, our research group has developed and studied new rare-earth doped materials for the promising technology of solid-state laser cooling, which is based on anti-stokes fluorescence. To the best of our knowledge, our group is the only one in Canada leading the research into the properties of nanoparticles,In recent years, our research group has developed and studied new rare-earth doped materials for the promising technology of solid-state laser cooling, which is based on anti-stokes fluorescence. To the best of our knowledge, our group is the only one in Canada leading the research into the properties of nanoparticles, glasses and glass-ceramics for optical refrigeration applications. In the present work, optical properties of 50GeO2- 30PbF2-18PbO-2YbF3 glass-ceramics for laser cooling are presented and discussed as a function of crystallization temperature. Spectroscopic results show that samples have near infrared photoluminescence emission due to the 2F5/2 – 2F7/2 Yb3+ transition, centered at ~1016 nm with an excitation wavelength of 920 nm or 1011 nm, and the highest photoluminescence emission efficiency occurs for heat-treatment for 5 h at 350°C. The internal photoluminescence quantum yield varies between 99% and 80%, depending on the temperature of heat-treatment, being the most efficient under 1011 nm excitation. The 2F5/2 lifetime increases from 1.472 to 1.970 ms for heat treatments at 330°C to 350°C, respectively, due to energy trapping and the low phonon energy of the nanocrystals. The sample temperature dependence was measured with a fiber Bragg grating sensor, as a function of input pump laser wavelength and processing temperature. These measurements show that the heating process approaches near zero for an excitation wavelength between 1020 and 1030 nm, which is an indication that phonons are removed effectivelly from the glass-ceramic materials, and they can be used for optical laser cooling applications. On the other hand, the temperature increase as a function of input laser power into samples remains constant between 920 and 980 nm wavelength excitation, a temperature variation of 36 K/W (temperature of 58°C/W) was attained under excitation at 950 nm, showing a possible use for biomedical applications to be explored.1).
Frontiers of Optoelectronics
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 189 (2018)
REVIEW ARTICLE
Broadband linearization for 5G fronthaul transmission
Xiupu ZHANG
5G is emerging, but the current fronthaul transmission technologies used for 3G and 4G may not be efficient and appropriate for 5G. It has been found that frequency division multiple access (FDMA) and timedivision multiple access (TDMA) based radio over fiber (RoF) may be considered the most appropriate for 5G fronthau5G is emerging, but the current fronthaul transmission technologies used for 3G and 4G may not be efficient and appropriate for 5G. It has been found that frequency division multiple access (FDMA) and timedivision multiple access (TDMA) based radio over fiber (RoF) may be considered the most appropriate for 5G fronthaul transmission technology. Due to analog RoF transmission, broadband linearization is required. In this work, both electrical and optical broadband linearization techniques are reviewed..
Frontiers of Optoelectronics
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 107 (2018)
Performance of coherent optical fiber transmission systems
John C.
A brief overview of recent experimental research on coherent optical fiber transmission systems at Queen’s University is presented. Exemplary results are described that exploit real-time signal processing to assess the impact of cascaded optical filtering.1)A brief overview of recent experimental research on coherent optical fiber transmission systems at Queen’s University is presented. Exemplary results are described that exploit real-time signal processing to assess the impact of cascaded optical filtering.1).
Frontiers of Optoelectronics
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 128 (2018)
On-chip frequency combs and telecommunications signal processing meet quantum optics
Christian REIMER, Yanbing ZHANG, Piotr ROZTOCKI, Stefania SCIARA, Luis Romero, Mehedi ISLAM, Bennet FISCHER, Benjamin WETZEL, Alfonso Carmelo, Sai Tak, Brent LITTLE, David MOSS, Lucia CASPANI, Jose AZANA, Michael KUES, and Roberto MORANDOTTI
Entangled optical quantum states are essential towards solving questions in fundamental physics and are at the heart of applications in quantum information science. For advancing the research and development of quantum technologies, practical access to the generation and manipulation of photon states carrying significaEntangled optical quantum states are essential towards solving questions in fundamental physics and are at the heart of applications in quantum information science. For advancing the research and development of quantum technologies, practical access to the generation and manipulation of photon states carrying significant quantum resources is required. Recently, integrated photonics has become a leading platform for the compact and costefficient generation and processing of optical quantum states. Despite significant advances, most on-chip nonclassical light sources are still limited to basic bi-photon systems formed by two-dimensional states (i.e., qubits). An interesting approach bearing large potential is the use of the time or frequency domain to enabled the scalable onchip generation of complex states. In this manuscript, we review recent efforts in using on-chip optical frequency combs for quantum state generation and telecommunications components for their coherent control. In particular, the generation of bi- and multi-photon entangled qubit states has been demonstrated, based on a discrete time domain approach. Moreover, the on-chip generation of high-dimensional entangled states (quDits) has recently been realized, wherein the photons are created in a coherent superposition of multiple pure frequency modes. The time- and frequency-domain states formed with on-chip frequency comb sources were coherently manipulated via off-the-shelf telecommunications components. Our results suggest that microcavity-based entangled photon states and their coherent control using accessible telecommunication infrastructures can open up new venues for scalable quantum information science..
Frontiers of Optoelectronics
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 134 (2018)
Fiber transmission demonstrations in vector mode space division multiplexing
Leslie A., and Sophie LAROCHELLE
Abstract Much attention has been focused on the use of scalar modes for space division multiplexing (SDM). Alternative vector mode bases offer another solution set for SDM, expanding the available trade-offs in system performance and complexity. We present two types of ring core fiber conceived and designed to explore Abstract Much attention has been focused on the use of scalar modes for space division multiplexing (SDM). Alternative vector mode bases offer another solution set for SDM, expanding the available trade-offs in system performance and complexity. We present two types of ring core fiber conceived and designed to explore SDM with fibers exhibiting low interactions between supported modes. We review demonstrations of fiber data transmission for two separate vector mode bases: one for orbital angular momentum (OAM) modes and one for linearly polarized vector (LPV) modes. The OAM mode demonstrations include short transmissions using commercially available transceivers, as well as kilometer length transmission at extended data rates. The LPV demonstrations span kilometer length transmissions at high data rate with coherent detection, as well as a radio over fiber experiment with direct detection of narrowband signals..
Frontiers of Optoelectronics
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 155 (2018)
Optical signal processing based on silicon photonics waveguide Bragg gratings: review
Saket KAUSHAL, Rui Cheng, Minglei Ma, Ajay Mistry, Maurizio Burla, Lukas Chrostowski, and Jose Azana
This paper reviews the work done by researchers at INRS and UBC in the field of integrated microwave photonics (IMWPs) using silicon based waveguide Bragg gratings (WBGs). The grating design methodology is discussed in detail, including practical device fabrication considerations. On-chip implementations of various funThis paper reviews the work done by researchers at INRS and UBC in the field of integrated microwave photonics (IMWPs) using silicon based waveguide Bragg gratings (WBGs). The grating design methodology is discussed in detail, including practical device fabrication considerations. On-chip implementations of various fundamental photonic signal processing units, including Fourier transformers, Hilbert transformers, ultrafast pulse shapers etc., are reviewed. Recent progress on WBGsbased IMWP subsystems, such as true time delay elements, phase shifters, real time frequency identification systems, is also discussed..
Frontiers of Optoelectronics
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 163 (2018)
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