Investigations of high-speed digital imaging of low-light-level events using pulsed near-infrared laser light sources

1997 ◽  
Author(s):  
Connie Jantzen ◽  
Rick Slagle
Keyword(s):  
Digital Imaging ◽  
High Speed ◽  
Near Infrared ◽  
Laser Light ◽  
Light Level ◽  
Infrared Laser ◽  
Light Sources ◽  
Low Light

scholarly journals Ultrafast electro-optic light with subcycle control

Science ◽  
2018 ◽  
Vol 361 (6409) ◽  
pp. 1358-1363 ◽  
Author(s):  
David R. Carlson ◽  
Daniel D. Hickstein ◽  
Wei Zhang ◽  
Andrew J. Metcalf ◽  
Franklyn Quinlan ◽  
...  
Keyword(s):  
High Speed ◽  
Near Infrared ◽  
Continuous Wave ◽  
Mode Locking ◽  
Light Sources ◽  
Electro Optic ◽  
High Pulse ◽  
Optical Cycle ◽  
Rapid Transients ◽  
And Control

Light sources that are ultrafast and ultrastable enable applications like timing with subfemtosecond precision and control of quantum and classical systems. Mode-locked lasers have often given access to this regime, by using their high pulse energies. We demonstrate an adaptable method for ultrastable control of low-energy femtosecond pulses based on common electro-optic modulation of a continuous-wave laser light source. We show that we can obtain 100-picojoule pulse trains at rates up to 30 gigahertz and demonstrate sub–optical cycle timing precision and useful output spectra spanning the near infrared. Our source enters the few-cycle ultrafast regime without mode locking, and its high speed provides access to nonlinear measurements and rapid transients.

Periodic subwavelength ripples on lithium niobate surfaces generated by tightly focused sub-15 femtosecond sub-nanojoule pulsed near-infrared laser light

2013 ◽  
Vol 15 (5) ◽  
pp. 055601 ◽  
Author(s):  
Martin Straub ◽  
Benjamin Weigand ◽  
Maziar Afshar ◽  
Dara Feili ◽  
Helmut Seidel ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Near Infrared ◽  
Laser Light ◽  
Infrared Laser

Near-infrared laser light mediated cancer therapy by photothermal effect of Fe3O4 magnetic nanoparticles

Biomaterials ◽  
2013 ◽  
Vol 34 (16) ◽  
pp. 4078-4088 ◽  
Author(s):  
Maoquan Chu ◽  
Yuxiang Shao ◽  
Jinliang Peng ◽  
Xiangyun Dai ◽  
Haikuo Li ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Cancer Therapy ◽  
Near Infrared ◽  
Laser Light ◽  
Infrared Laser ◽  
Photothermal Effect ◽  
Fe3o4 Magnetic Nanoparticles

Periodic nanostructures on Si(100) surfaces generated by high-repetition rate sub-15 fs pulsed near-infrared laser light

2012 ◽  
Vol 37 (2) ◽  
pp. 190 ◽  
Author(s):  
Martin Straub ◽  
Maziar Afshar ◽  
Dara Feili ◽  
Helmut Seidel ◽  
Karsten König
Keyword(s):  
Repetition Rate ◽  
Near Infrared ◽  
Laser Light ◽  
Infrared Laser ◽  
High Repetition Rate ◽  
Periodic Nanostructures ◽  
High Repetition

scholarly journals MISR Calibration and Implications for Low-Light-Level Aerosol Retrieval over Dark Water

2005 ◽  
Vol 62 (4) ◽  
pp. 1032-1052 ◽  
Author(s):  
Ralph Kahn ◽  
Wen-Hao Li ◽  
John V. Martonchik ◽  
Carol J. Bruegge ◽  
David J. Diner ◽  
...  
Keyword(s):  
Optical Thickness ◽  
Near Infrared ◽  
Light Level ◽  
Single Scattering ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Aerosol Layer ◽  
Radiometric Calibration ◽  
Low Light ◽  
Vicarious Calibration

Abstract Studying aerosols over ocean is one goal of the Multiangle Imaging Spectroradiometer (MISR) and other spaceborne imaging systems. But top-of-atmosphere equivalent reflectance typically falls in the range of 0.03 to 0.12 at midvisible wavelengths and can be below 0.01 in the near-infrared, when an optically thin aerosol layer is viewed over a dark ocean surface. Special attention must be given to radiometric calibration if aerosol optical thickness, and any information about particle microphysical properties, are to be reliably retrieved from such observations. MISR low-light-level vicarious calibration is performed in the vicinity of remote islands hosting Aerosol Robotic Network (AERONET) sun- and sky-scanning radiometers, under low aerosol loading, low wind speed, relatively cloud free conditions. MISR equivalent reflectance is compared with values calculated from a radiative transfer model constrained by coincident, AERONET-retrieved aerosol spectral optical thickness, size distribution, and single scattering albedo, along with in situ wind measurements. Where the nadir view is not in sun glint, MISR equivalent reflectance is also compared with Moderate Resolution Imaging Spectroradiometer (MODIS) reflectance. The authors push the limits of the vicarious calibration method’s accuracy, aiming to assess absolute, camera-to-camera, and band-to-band radiometry. Patterns repeated over many well-constrained cases lend confidence to the results, at a few percent accuracy, as do additional vicarious calibration tests performed with multiplatform observations taken during the Chesapeake Lighthouse and Aircraft Measurements for Satellites (CLAMS) campaign. Conclusions are strongest in the red and green bands, but are too uncertain to accept for the near-infrared. MISR nadir-view and MODIS low-light-level absolute reflectances differ by about 4% in the blue and green bands, with MISR reporting higher values. In the red, MISR agrees with MODIS band 14 to better than 2%, whereas MODIS band 1 is significantly lower. Compared to the AERONET-constrained model, the MISR aft-viewing cameras report reflectances too high by several percent in the blue, green, and possibly the red. Better agreement is found in the nadir- and the forward-viewing cameras, especially in the blue and green. When implemented on a trial basis, calibration adjustments indicated by this work remove 40% of a 0.05 bias in retrieved midvisible aerosol optical depth over dark water scenes, produced by the early postlaunch MISR algorithm. A band-to-band correction has already been made to the MISR products, and the remaining calibration adjustments, totaling no more than a few percent, are planned.

Effect of red and near-infrared laser light on adenosine triphosphate (ATP) in the luciferine–luciferase reaction

2004 ◽  
Vol 168 (1-2) ◽  
pp. 59-65 ◽  
Author(s):  
Albert Amat ◽  
Josepa Rigau ◽  
Renata Nicolau ◽  
Maurice Aalders ◽  
Maria Rosa Fenoll ◽  
...  
Keyword(s):  
Adenosine Triphosphate ◽  
Near Infrared ◽  
Laser Light ◽  
Infrared Laser

Treatment of tumor in lymph nodes using near-infrared laser light-activated thermosensitive liposome-encapsulated doxorubicin and gold nanorods

2017 ◽  
Vol 10 (12) ◽  
pp. 1676-1682 ◽  
Author(s):  
Daisuke Matsuki ◽  
Oladipo Adewale ◽  
Sachiko Horie ◽  
Junnosuke Okajima ◽  
Atsuki Komiya ◽  
...  
Keyword(s):  
Lymph Nodes ◽  
Gold Nanorods ◽  
Near Infrared ◽  
Laser Light ◽  
Infrared Laser ◽  
Thermosensitive Liposome
Sign in / Sign up

Export Citation Format

Share Document