Search for dissertations about: "bragg grating"

Showing result 1 - 5 of 28 swedish dissertations containing the words bragg grating.

  1. 1. Fibre Bragg Gratings Characterization, Realization and Simulation

    University dissertation from Stockholm : KTH

    Author : Ingemar Petermann; KTH.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Bragg gratings; optical fibres; optical fibre components; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Abstract : The main topic of this thesis is realization and characterization of fibre Bragg gratings.A novel versatile grating fabrication technique is developed and a number of gratings are realized, showing the potential of the system. READ MORE

  2. 2. Fibre Bragg Grating Components for Filtering, Switching and Lasing

    University dissertation from Stockholm : KTH

    Author : Zhangwei Yu; KTH.; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fibre Bragg grating; photosensitivity; apodization; chirp; phase-shift; microwave optical filtering; TECHNOLOGY Electrical engineering; electronics and photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik;

    Abstract : Fibre Bragg gratings (FBGs) are key components for a vast number of applications in optical communication systems, microwave photonics systems, and optical sensors, etc. The main topic of this thesis is fibre Bragg grating fabrication and applications in direct microwave optical filtering, high speed switching and switchable dual-wavelength fibre lasers. READ MORE

  3. 3. Tandem optical parametric oscillators using volume Bragg grating spectral control

    University dissertation from Stockholm : KTH

    Author : Markus Henriksson; KTH.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; optical parametric oscillators; mid-infrared; volume Bragg gratings; PPKTP; ZGP; nonlinear optics; narrowband OPO; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Abstract : This thesis describes research on near degenerate quasi phase-matched opticalparametric oscillators (OPO) where volume Bragg gratings (VBG) are used toproduce narrow oscillation bandwidth. These OPOs are then used to pump a secondOPO to generate mid-infrared radiation.The atmospheric transmission windows in the 3. READ MORE

  4. 4. Properties of Volume Bragg Gratings and Nonlinear Crystals for Laser Engineering

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Staffan Tjörnhammar; KTH.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; volume Bragg grating; VBG; thermal effects; nonlinear optics; KTiOPO4; quasi-phase matching; photochromic damage; grey-tracking; color centers; blue-light induced infrared absorption; BLIIRA; Physics; Fysik;

    Abstract : This thesis focuses on two topics: thermal limitations of volume Bragg gratings (VBGs) employed as laser-cavity mirrors and formation of color centers in KTiOPO4 and its isomorphs.To explore the mechanisms of the thermal limitations of VBGs in high power lasers, I designed and constructed a diode-pumped, solid‑state laser with a VBG as cavity mirror that had a significantly higher absorption than what is typical. READ MORE

  5. 5. Study on electroabsorption modulators and grating couplers for optical interconnects

    University dissertation from Stockholm : KTH

    Author : Yongbo Tang; KTH.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Photonic integrated circuit; optical interconnect; transmission line; traveling-wave; electro-absorption modulator; hybrid silicon evanescent platform; grating coupler; vertical coupling scheme; optical antenna; lag effect; polarization beam splitter; TECHNOLOGY Electrical engineering; electronics and photonics Photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Fotonik; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Abstract : Decades of efforts have pushed the replacement of electrical interconnects by optical links to the interconnects between computers, racks and circuit boards. It may be expected that optical solutions will further be used for inter-chip and intra-chip interconnects with potential benefits in bandwidth, capacity, delay, power consumption and crosstalk. READ MORE