| 1. |
- Bogaerts, W., et al.
(författare)
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Low-Power Electro-Optic Actuators for Large-Scale Programmable Photonic Circuits
- 2021
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Ingår i: 2021 Conference on Lasers and Electro-Optics, CLEO 2021 - Proceedings. - : Institute of Electrical and Electronics Engineers Inc..
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Konferensbidrag (refereegranskat)abstract
- Photonic integrated circuits are becoming increasingly more complex, especially with the emergence of programmable photonic circuits. These require many tunable photonic elements, such as electro-optic phase shifters and tunable couplers. We will discuss our progress in compact, low-power silicon photonics actuators based on heaters, liquid crystal and MEMS that can be scaled up to large circuits.
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| 2. |
- Lindell, Lina, 1977-, et al.
(författare)
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Journey to the destination: a circular tourism economy : a training program for the hospitality industry to facilitate a transition towards increased circularity in the South Baltic Region
- 2019
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Being aware of the extent of the tourism industry and that it is ever growing, which is also encouraged in many individual countries by the national and regional governments, it is evident that the tourism industry is an essential target group for introducing circular concepts and implementing circular solutions. Yet, this sector has so far received little attention in the literature and initiatives on circularity.Circular Economy (CE) goes beyond “green” or “environmental”, it includes all aspects of a community and challenges us to create solutions that are completely different from what we are used to. It also invites us to open up and interact with other stakeholders and the general public.In your hands is the first training material in circular economy specifically developed for small to medium sized companies of the tourism industry in the South Baltic Region. It is a small but important step in the direction towards circularity and a wellbeing society. Through this work we have shown that despite cultural challenges and regional differences there is a shared, common interest in making tourism more sustainable and even to work together towards a transformation of the hospitality industry. This common vision has been stronger than the challenges we faced in making this work and this is what will ensure the continued growing awareness on circularity and its integration in different sectors in our communities. In this work we have featured some of the groundbreaking experts in this field, and some of the first good practices from our regions. They are all courageous pioneers in a field that with time will become the norm. In fact, in the 10th Annual Forum of the EU strategy for the Baltic Sea Region (12-13/6/2019, Gdansk, Poland), CE was highlighted as the pathway to reach prosperity and wellbeing in the Baltic Sea Region.
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| 3. |
- Quack, N., et al.
(författare)
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Silicon photonic MEMS : Exploiting mechanics at the nanoscale to enhance photonic integrated circuits
- 2019
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Ingår i: Optics InfoBase Conference Papers. - Washington, D.C. : OSA - The Optical Society.
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Konferensbidrag (refereegranskat)abstract
- With the maturing and the increasing complexity of Silicon Photonics technology, novel avenues are pursued to reduce power consumption and to provide enhanced functionality: exploiting mechanical movement in advanced Silicon Photonic Integrated Circuits provides a promising path to access a strong modulation of the effective index and to low power consumption by employing mechanically stable and thus non-volatile states. In this paper, we will discuss recent achievements in the development of MEMS enabled systems in Silicon Photonics and outline the roadmap towards reconfigurable general Photonic Integrated Circuits.
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| 4. |
- Bogaerts, W., et al.
(författare)
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Programmable photonic circuits using silicon photonic MEMS
- 2021
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Ingår i: Optics InfoBase Conference Papers. - : The Optical Society.
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Konferensbidrag (refereegranskat)abstract
- We present a silicon photonics technology extended with low-power MEMS scalable to large circuits. This enables us to make photonic waveguide meshes that can be reconfigured using electronics and software.
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| 5. |
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| 6. |
- Edinger, Pierre, et al.
(författare)
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Silicon photonic MEMS phase shifter with µs time constant built on a foundry platform
- 2021
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Ingår i: Optics InfoBase Conference Papers. - : The Optical Society.
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Konferensbidrag (refereegranskat)abstract
- MEMS enable low power tuners in silicon photonics, but existing phase shifters lack in range, speed, and loss. We implement a 2π phase shifter with a 1.54 µs time constant and 0.5 dB insertion loss in IMEC's iSiPP50G platform.
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| 7. |
- Errando-Herranz, Carlos, 1989-, et al.
(författare)
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MEMS for Photonic Integrated Circuits
- 2020
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Ingår i: IEEE Journal of Selected Topics in Quantum Electronics. - : IEEE Press. - 1077-260X .- 1558-4542. ; 26:2, s. 1-16
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Tidskriftsartikel (refereegranskat)abstract
- The field of microelectromechanical systems (MEMS) for photonic integrated circuits (PICs) is reviewed. This field leverages mechanics at the nanometer to micrometer scale to improve existing components and introduce novel functionalities in PICs. This review covers the MEMS actuation principles and the mechanical tuning mechanisms for integrated photonics. The state of the art of MEMS tunable components in PICs is quantitatively reviewed and critically assessed with respect to suitability for large-scale integration in existing PIC technology platforms. MEMS provide a powerful approach to overcome current limitations in PIC technologies and to enable a new design dimension with a wide range of applications.
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| 8. |
- Errando-Herranz, Carlos, et al.
(författare)
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Transfer-Printed Single-Photon Detectors on Arbitrary Photonic Substrates
- 2023
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Ingår i: 2023 Conference on Lasers and Electro-Optics, CLEO 2023. - : Institute of Electrical and Electronics Engineers Inc..
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Konferensbidrag (refereegranskat)abstract
- We demonstrate the integration of superconducting single-photon detectors onto arbitrary photonic substrates via transfer printing. Using this method, we show single-photon detection in a lithium niobate on insulator photonic circuit.
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| 9. |
- Fallenius, Bengt E. G., et al.
(författare)
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Experimental study on the effect of pulsating inflow to an enclosure for improved mixing
- 2013
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Ingår i: International Journal of Heat and Fluid Flow. - : Elsevier. - 0142-727X .- 1879-2278. ; 44, s. 108-119
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Tidskriftsartikel (refereegranskat)abstract
- Optimal control of inlet jet flows is of broad interest for enhanced mixing in ventilated rooms. The general approach in mechanical ventilation is forced convection by means of a constant flow rate supply. However, this type of ventilation may cause several problems such as draught and appearance of stagnation zones, which reduces the ventilation efficiency. A potential way to improve the ventilation quality is to apply a pulsating inflow, which has been hypothesised to reduce the stagnation zones due to enhanced mixing. The present study aims at testing this hypothesis, experimentally, in a small-scale two-dimensional water model using Particle Image Velocimetry with an in-house vortex detection program. We are able to show that for an increase in pulsation frequency or alternatively in the flow rate the stagnation zones are reduced in size and the distribution of vortices becomes more homogeneous over the considered domain. The number of vortices (all scales) increases by a factor of four and the swirl-strength by about 50% simply by turning on the inflow pulsation. Furthermore, the vortices are well balanced in terms of their rotational direction, which is validated by the symmetric Probability Density Functions of vortex circulation (Γ) around Γ= 0. There are two dominating vortex length scales in the flow, namely 0.6 and 0.8 inlet diameters and the spectrum of vortex diameters become broader by turning on the inflow pulsation. We conclude that the positive effect for enhanced mixing by increasing the flow rate can equally be accomplished by applying a pulsating inflow.
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| 10. |
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