Picosecond temporal contrast of Ti:Sapphire lasers (Conference Presentation)

2017 ◽  
Author(s):  
Mikhail P. Kalashnikov ◽  
Nikita Khodakovskiy
Keyword(s):  
Temporal Contrast ◽  
Ti:Sapphire Lasers

Degradation of picosecond temporal contrast of Ti:sapphire lasers with coherent pedestals

2016 ◽  
Vol 41 (19) ◽  
pp. 4441 ◽  
Author(s):  
Nikita Khodakovskiy ◽  
Mikhail Kalashnikov ◽  
Emilien Gontier ◽  
Franck Falcoz ◽  
Pierre-Mary Paul
Keyword(s):  
Temporal Contrast ◽  
Ti:Sapphire Lasers

scholarly journals High-power Ti:Sapphire lasers: Temporal contrast and spectral narrowing

2007 ◽  
Vol 25 (2) ◽  
pp. 219-223 ◽  
Author(s):  
M Kalashnikov ◽  
K Osvay ◽  
W Sandner
Keyword(s):  
Power Level ◽  
Spectral Bandwidth ◽  
Temporal Contrast ◽  
Chirped Pulse ◽  
Pulse Amplification ◽  
Ti:Sapphire Lasers ◽  
Spectral Narrowing ◽  
Chirped Pulses ◽  
Chirped Pulse Amplification ◽  
Gain Narrowing

New extensions of the chirped pulse amplification (CPA) scheme designed specially for petawatt Ti:Sapphire lasers are considered. The two new schemes support a spectral bandwidth sufficient for 20 fs pulses and a temporal contrast of 1012. The Double CPA scheme consists of two CPA stages with an intermediate temporal pulse filtering for temporal contrast improvement. The scheme of Negative–Positive CPA amplification takes advantage of consecutive saturated amplification of down chirped and up chirped pulses. This allows a suppress imprint of gain narrowing, which usually limits the spectral bandwidth at the multi-terawatt power level, and reach the bandwidth in excess of 50 nm without using any direct spectral shaping of the pulse.

scholarly journals Temporal contrast in Ti:sapphire lasers, characterization and control

1998 ◽  
Vol 4 (2) ◽  
pp. 449-458 ◽  
Author(s):  
M. Nantel ◽  
J. Itatani ◽  
An-Chun Tien ◽  
J. Faure ◽  
D. Kaplan ◽  
...  
Keyword(s):  
Temporal Contrast ◽  
Ti:Sapphire Lasers ◽  
And Control

scholarly journals Effects of mean luminance on goldfish temporal contrast sensitivity

1998 ◽  
Vol 38 (1) ◽  
pp. 55-59 ◽  
Author(s):  
Joseph Bilotta ◽  
Francesca M. Lynd ◽  
Maureen K. Powers
Keyword(s):  
Contrast Sensitivity ◽  
Temporal Contrast ◽  
Mean Luminance

scholarly journals Laser Use in Creating Orthodontic Adhesion to Ceramic Surfaces

2021 ◽  
Vol 11 (6) ◽  
pp. 2512
Author(s):  
Anca Labunet ◽  
Andreea Kui ◽  
Sorina Sava
Keyword(s):  
Hydrofluoric Acid ◽  
Surface Preparation ◽  
Good Alternative ◽  
Ceramic Surface ◽  
Ti:Sapphire Lasers ◽  
Ceramic Surfaces ◽  
Golden Standard ◽  
Laser Systems ◽  
Ceramic Crowns

Orthodontists must sometimes bond attachments to ceramic crowns, by using one of the surface preparations available, such as sandblasting or acid etching with hydrofluoric acid. Research shows that different laser systems may also be used for this purpose. The aim of this review is to determine which laser type and modality of use is the most effective in increasing shear bond strength of brackets bonded to ceramic surfaces. Two independent researchers studied the current literature 1990–2018 and selected original articles focusing on in vitro research on laser use for ceramic surface preparation for bonding metallic or ceramic attachments. Twelve articles have met the criteria and have been thoroughly revised, focusing on 2 fractional, Nd:Yag, Er:Yag, femtosecond and Ti:Sapphire lasers. There is little difference shown by the current studies between ceramic types and information on orthodontic bonding to non-feldspathic ceramics is scarce. Femtosecond laser is a good alternative to classical surface preparation with hydrofluoric acid. Nd:Yag laser is more suitable for surface preparation of ceramics than different types of Er:Yag lasers. Difference in laser power may achieve different results, but the golden standard for lasers use has not been found. Laser usage does not obtain the same results as hydrofluoric acid and cannot, so far, eliminate its application.

Temporal contrast and the word frequency effect.

1979 ◽  
Vol 33 (3) ◽  
pp. 141-147 ◽  
Author(s):  
Richard B. May ◽  
Lauren J. Cuddy ◽  
Janice M. Norton
Keyword(s):  
Word Frequency ◽  
Frequency Effect ◽  
Temporal Contrast ◽  
Word Frequency Effect
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