Frequency conversion of broad-bandwidth laser light

1990 ◽  
Vol 26 (3) ◽  
pp. 580-588 ◽  
Author(s):  
R.W. Short ◽  
S. Skupsky
Keyword(s):  
Frequency Conversion ◽  
Laser Light ◽  
Broad Bandwidth

Nonlinear evolution of broad-bandwidth, laser-imprinted nonuniformities in planar targets accelerated by 351-nm laser light

1999 ◽  
Vol 6 (10) ◽  
pp. 4022-4036 ◽  
Author(s):  
V. A. Smalyuk ◽  
T. R. Boehly ◽  
D. K. Bradley ◽  
V. N. Goncharov ◽  
J. A. Delettrez ◽  
...  
Keyword(s):  
Laser Light ◽  
Nonlinear Evolution ◽  
Broad Bandwidth

Multiplex Infrared-Visible Sum-Frequency Spectrometer with a Phase-Conjugated Pulse Mixing Device for Narrow-Bandwidth Visible Probe Generation

2002 ◽  
Vol 56 (10) ◽  
pp. 1298-1302 ◽  
Author(s):  
Taka-Aki Ishibashi ◽  
Hiroshi Onishi
Keyword(s):  
Femtosecond Laser ◽  
Laser Light ◽  
Broad Band ◽  
Infrared Laser ◽  
High Signal ◽  
Broad Bandwidth ◽  
Sum Frequency ◽  
Narrow Bandwidth ◽  
Visible Laser ◽  
Frequency Mixing

We have constructed a multiplex infrared-visible sum-frequency (SF) spectrometer. Picosecond narrow-bandwidth visible laser light (full width at half-maximum (FWHM) ∼8 cm−1, 400 nm) was obtained by sum-frequency mixing of a pair of phase-conjugated broad-bandwidth pulses generated from femtosecond laser light (∼110 fs, 800 nm). Femtosecond broad-band infrared laser light (FWHM ∼280 cm−1, 3.4 μm) was obtained as a difference frequency mixing output of the signal and idler lights of an optical parametric amplifier pumped by the femtosecond laser light. Broad-bandwidth sum-frequency signal light (FWHM ∼280 cm−1) was generated by focusing the broad-bandwidth femtosecond infrared laser light and the narrow-bandwidth picosecond visible laser light onto a sample surface. The generated light was dispersed by a spectrograph and analyzed with a multichannel detector. An SF spectrum with a high signal-to-noise ratio over a 400 cm−1 spectral region with an ∼8 cm−1 resolution was obtained from an octadecanethiol self-assembled monolayer with a 60 s exposure time.

Numerical investigation of the self‐focusing of broad‐bandwidth laser light with applied angular dispersion

1994 ◽  
Vol 76 (4) ◽  
pp. 2027-2035 ◽  
Author(s):  
P. W. McKenty ◽  
S. Skupsky ◽  
J. H. Kelly ◽  
C. T. Cotton
Keyword(s):  
Numerical Investigation ◽  
Laser Light ◽  
The Self ◽  
Angular Dispersion ◽  
Broad Bandwidth ◽  
Self Focusing

Chronic Laser Exposure Effects on Rabbit Retina

1972 ◽  
Vol 30 ◽  
pp. 54-55
Author(s):  
Burton B. Silver ◽  
Theodore Lawwill
Keyword(s):  
Laser Irradiation ◽  
Laser Light ◽  
Broad Band ◽  
Argon Laser ◽  
Atropine Sulfate ◽  
Ultrastructural Changes ◽  
Laser Exposure ◽  
Rabbit Retina ◽  
Histological Changes ◽  
Threshold Doses

Dutch-belted 1 to 2.5 kg anesthetized rabbits were exposed to either xenon or argon laser light administered in a broad band, designed to cover large areas of the retina. For laser exposure, the pupil was dilated with atropine sulfate 1% and pheny lephrine 10%. All of the laser generated power was within a band centered at 5145.0 Anstroms. Established threshold for 4 hour exposures to laser irradiation are in the order of 25-35 microwatts/cm2. Animals examined for ultrastructural changes received 4 hour threshold doses. These animals exhibited ERG, opthalmascopic, and histological changes consistent with threshold damage.One month following exposure the rabbits were killed with pentobarbitol. The eyes were immediately enucleated and dissected while bathed in 3% phosphate buffered gluteraldehyde.

Estimation of the noise in TEM image recorded on “imaging plate”

1987 ◽  
Vol 45 ◽  
pp. 748-749
Author(s):  
T. Oikawa ◽  
N. Mori ◽  
T. Katoh ◽  
Y. Harada ◽  
J. Miyahara ◽  
...  
Keyword(s):  
Low Dose ◽  
Quantum Noise ◽  
Laser Light ◽  
Imaging Plate ◽  
Total System ◽  
Electron Dose ◽  
X Ray ◽  
Image Recording ◽  
Recording Material ◽  
Highly Sensitive

The “Imaging Plate”(IP) is a highly sensitive image recording plate for X-ray radiography. It has been ascertained that the IP has superior properties and high practicability as an image recording material in a TEM. The sensitivity, one of the properties, is about 3 orders higher than that of conventional photo film. The IP is expected to be applied to low dose techniques. In this paper, an estimation of the quantum noise on the TEM image which appears in case of low electron dose on the IP is reported.In this experiment, the JEM-2000FX TEM and an IP having the same size as photo film were used.Figure 1 shows the schematic diagram of the total system including the TEM used in this experiment. In the reader, He-Ne laser light is scanned across the IP, then blue light is emitted from the IP.

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