Sökning: "Short-wavelength infrared"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden Short-wavelength infrared.

1. 1. Analysis of atmospheric influences on ratio thermography for solar tower systems

   Master-uppsats, Linköpings universitet/Algebra, geometri och diskret matematik; Linköpings universitet/Tekniska fakulteten

   Författare :Albin Englin; [2022]
   Nyckelord :Concentrated solar power; Ratio thermography; Shortwave infrared; Gray body assumption; Atmospheric compensation;

   Sammanfattning : The knowledge of temperature and emissivity of the receiver are both critical for a solar tower power plant, in order to guarantee an efficient operation of the thermal receiver on the one hand, while monitoring any degradation of the receiver coating on the other hand. To make these measurements, a new thermographic system is currently being developed, using a multispectral camera working in the short wavelength infrared spectrum. LÄS MER

3. 2. Dispersion management and characterization of ultrashort laser pulses for the optimization of parametric processes

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

   Författare :Axel Elfving; [2019]
   Nyckelord :frequency resolved optical gating; optical parametric amplification; difference frequency generation; nonlinear optics; laser pulse compression; lasers; optics; Technology and Engineering; Physics and Astronomy;

   Sammanfattning : This thesis set out to continue the development of a short-wave infrared (SWIR) optical parametric amplifier (OPA). The system is based on a Yb-ber chirped pulse amplification (CPA) laser delivering 400 fs long pulses, centered around 1030 nm, at 200 kHz repetition rate and 40 W average power. LÄS MER

4. 3. Noncollinear optical parametric amplification of a supercontinuum

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

   Författare :Henrik Åkesson; [2019]
   Nyckelord :optical parametric amplification; supercontinuum generation; nonlinear optics; laser pulse compression; lasers; optics; Physics and Astronomy; Technology and Engineering;

   Sammanfattning : During this thesis, work has been done towards realizing a short-wave infrared (SWIR) laser source based on optical parametric amplification. It is planned that this setup should be able to produce few-cycle laser pulses at 2μm with a stable carrier-envelope phase (CEP). LÄS MER

5. 4. Compressive Sensing: Single Pixel SWIR Imaging of Natural Scenes

   Master-uppsats, Linköpings universitet/Datorseende

   Författare :Andreas Brorsson; [2018]
   Nyckelord :Compressed sensing; Compressive sensing; CS; Compressive imaging; compressed imaging; CI; SPC; Single pixel camera; single pixel imaging; SWIR; Short-wavelength infrared; IR; infrared; Natural Scenes; DMD; Digital micromirror device; FOI;

   Sammanfattning : Photos captured in the shortwave infrared (SWIR) spectrum are interesting in military applications because they are independent of what time of day the pic- ture is captured because the sun, moon, stars and night glow illuminate the earth with short-wave infrared radiation constantly. A major problem with today’s SWIR cameras is that they are very expensive to produce and hence not broadly available either within the military or to civilians. LÄS MER

7. 5. Pulse Compression of Short Wavelength Infrared Optical Parametric Amplified Pulses Using a Hollow Core Capillary

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

   Författare :Neven Ibrakovic; [2015]
   Nyckelord :HHG; pulse compression; HCF; KDP; Dispersion; few cycle; TOPAS; OPA; Nonlinear; anomalous dispersion; waveguide; Physics and Astronomy;

   Sammanfattning : In this thesis, a method for producing few-cycle short wavelength infrared pulses is presented. The pulses are created by down converting the 800 nm output of a Ti:Sapphire laser in an optical parametric amplifier to 1300 nm, and spectrally broadened in a hollow core fiber in order to obtain a short transform limited pulse duration. LÄS MER