Essays about: "photonics"

Showing result 11 - 15 of 32 essays containing the word photonics.

  1. 11. Optical Payload Mounting Interface Design for a Quantum Key Distribution CubeSat Telescope In-Orbit Demonstration

    University essay from KTH/Lättkonstruktioner

    Author : Lukas Jakas; [2020]
    Keywords : ;

    Abstract : Although free-space optical communication systems require to overcome demanding precision requirements for their optical payload, the photonics company mBryonics has taken on the challenge of designing a quantum key distribution telescope for an in-orbit demonstration mission on a CubeSat platform. A part of the task was formulated as a thesis project which is reported in this document. READ MORE

  3. 12. Physical modeling of optical modulators for optical link analysis : Optical link analysis in silicon photonics technologies

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Daniele Poggi; [2019]
    Keywords : Silicon photonics; physical modeling; ring modulator; electro-absorption modulator; optical modulator; optical link system; power consumption; Kiselfotonik; fysisk modellering; ringmodulator; elektroabsorptionsmodulator; optisk modulator; optiskt länksystem; strömförbrukning;

    Abstract : According to the 2018 Ethernet Roadmap projections, the requirements for high speed links keep increasing every year, always keeping an eye on the energy per bit consumption of the communication system. The Ethernet requirements are estimated to reach 1Tbps by 2022-2025. READ MORE

  4. 13. Automatic Measurement Setup for new Optical FPGA:s

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Tommy Lundberg; Daniel Nee; [2019]
    Keywords : silicon photonics; grating couplers; automatic testing; optical fibers;

    Abstract : Aiming to reduce research and development times in the field of silicon photonics, this paper presents a method for automatized device testing. Focus lies on automatic optical coupling between the grating couplers on a chip and optical fibers and efficient switching between devices when performing laboratory tests on silicon photonic chips. READ MORE

  5. 14. Automatic Measurement Setup for Characterization of On-Chip Tunable Grating Couplers

    University essay from KTH/Skolan för elektro- och systemteknik (EES)

    Author : Kristian Wahlqvist; Felix Caesar; [2017]
    Keywords : ;

    Abstract : Grating couplers are used for coupling betweenoptical fibers and on-chip silicon photonics waveguides. Efficientfiber-to-chip coupling is elemental in in the development ofphotonics, making the process of evaluating new grating couplerdesigns vital. READ MORE

  6. 15. High Accuracy Relative Luminescence Quantum Yield Measurements of Upconverting Nanoparticles

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

    Author : Björn Thomasson; [2016]
    Keywords : Upconverting Nanoparticles; Biomedical imaging; Luminescence tomography; Luminescence imaging; Engineering; Physics; Engineering Physics; Photonics; Cancer; Cancer detection; Cancer diagnostics; Laser Engineering; quantum yield; imaging; upconverting; Biophotonics; Single Point Tomography; Relative Luminescence Quantum Yield Measurements; Energy transfer upconversion; Nanoscience; Luminescence; Imaging of biological tissue; Upconversion; Beam profile evaluation; Beam profile; UCNP; UCNPs; Nanoparticles; Technology and Engineering;

    Abstract : The name Upconverting nanoparticles refers to a novel category of luminescence emitters that are capable of generating visible luminescence upon excitation with noncoherent and longer wavelength monochromatic near-infrared light, at excitation fluence rates as low as 1-103 W/cm2. This unique optical behaviour is of great interest to researchers as it could potentially allow for virtually autofluorescence free luminescence imaging of living tissue. READ MORE