Essays about: "DBR"

Found 3 essays containing the word DBR.

1. 1. Some Like It Hot: Pre-heating Prior to Bioreactor Treatment Enhances Nitrogen Removal From Mine Drainage

   University essay from Uppsala universitet/Luft-, vatten- och landskapslära

   Author : Laura Nina Bettoni; [2022]
   Keywords : denitrification; nitrate removal; temperature; woodchip bioreactor; waste rock leachate;

   Abstract : Ammonium-nitrate based explosives (NH4NO3) used within the operations of Kiruna iron ore mine release nitrate (NO3-) into the environment, potentially having adverse effects on local river-systems. One way of reducing NO3- impacts to the environment is through a woodchip denitrifying bioreactor (DBR). READ MORE

3. 2. Modeling a Tunable Narrow Linewidth Laser

   University essay from KTH/Skolan för teknikvetenskap (SCI)

   Author : Christoffer Ejemyr; [2020]
   Keywords : Laser; Tunable; Model; Lasing frequency; DBR;

   Abstract : In this report a model of a tunable narrow linewidth laser used for telecommunications is presented. The model uses both theoretical analysis and experimental data to create the mathematical models governing its behaviour and is aimed to be useful in a development environment with requirements on accuracy, efficient implementation and adaptability to future design. READ MORE

4. 3. Implantation isolation in AlGaAs/GaAs structures

   University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

   Author : Lucas Held; [2011]
   Keywords : ;

   Abstract : In this work the effect of implantation isolation in vertical cavity surface emitting laser (VCSEL) samples have been investigated cross sectional measurements using scanning spreading resistance microscopy (SSRM). The samples consist of two AlGaAs/GaAs Distributed Bragg Reflectors (DBR) structures with a GaAs quantum well region sandwiched in between them. READ MORE