Sökning: "laser diode"

Visar resultat 1 - 5 av 33 uppsatser innehållade orden laser diode.

1. 1. Simulations and modeling of light propagation in biological tissue

   Master-uppsats, Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen; Lunds universitet/Lunds Tekniska Högskola

   Författare :Emma Hjörneby; [2023]
   Nyckelord :Technology and Engineering;

   Sammanfattning : The GASMAS technique has previously proven useful for examining and measuring the oxygen concentration in the lungs of preterm infants. GASMAS can distinguish absorption by one gas from the bulk absorption of the surrounding media, and can provide an instant, non-invasive and non-destructive way of examining lungs, and diagnosing dangerous conditions such as pneumothorax. LÄS MER

3. 2. Gas in Scattering Media Absorption Spectroscopy in Large Geometries: Towards Monitoring Oxygen in Adult Lungs

   Master-uppsats, Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen

   Författare :Anna Brandt; [2022]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : GAs in Scattering Media Absorption Spectroscopy (GASMAS) is a technique to study free gas inside strongly scattering bulk-materials. GASMAS is successful in safely measuring oxygen in lungs of neonates, with low-power tuneable diode-laser spectroscopy at 760 nm. LÄS MER

4. 3. Single Photon LSCM in the NIR Range

   Master-uppsats, KTH/Tillämpad fysik

   Författare :Klara Wallenbro; [2022]
   Nyckelord :LSCM; NIR; SNSPD; LSCM; NIR; SNSPD;

   Sammanfattning : In this thesis a near-infrared laser scanning confocal microscope (NIR-LSCM) is built to operate with optimal performance at 1550nm in combination with simultaneous LED light imaging at 970nm. For detection, a camera equipped with a complementary metal oxide semiconductor (CMOS) sensor and a superconducting nanowire single photon detector (SNSPD) are used for the LED part and the LSCM part, respectively. LÄS MER

5. 4. High temperature tribological evaluation of a self-lubricating laser cladding with and without external solid lubricant

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Författare :Cecilia Nemeth; [2020]
   Nyckelord :high temperature tribology; hot metal forming of aluminium; self-lubricating laser cladding; external solid lubricant;

   Sammanfattning : The purpose of the project work was to build knowledge of the tribological behaviour of self-lubricating laser cladding, with and without external solid lubricant during conditions relevant for hot metal forming of aluminium. The materials used during the project were plates coated with a Ni-based self-lubricating clad and a reference sample of work tool steel. LÄS MER

7. 5. Design and Fabrication of 1550 nm Photonic Crystal Surface Emitting Lasers

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :João Martins de Pina; [2018]
   Nyckelord :Photonic crystal; surface-emitting laser; metal organic chemical vapour deposition; III-V semi- conductors; light emitting diode.;

   Sammanfattning : In this study, the design and fabrication of a monolithic InP-based 1550-nm photonic-crystal surfaceemitting laser (PCSEL) is reported. The device is composed by an InGaAsP multi-quantum well (MQW) active layer and InP photonic crystal (PhC) formed by metal organic chemical vapour deposition (MOCVD). LÄS MER