scholarly journals Spectroscopic second and third harmonic generation microscopy using a femtosecond laser source in the third near-infrared (NIR-III) optical window

2021 ◽  
Author(s):  
YUSUKE MURAKAMI ◽  
Minori Masaki ◽  
Shinichi Miyazaki ◽  
Ryosuke Oketani ◽  
Yu Hayashi ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Harmonic Generation ◽  
Near Infrared ◽  
Third Harmonic Generation ◽  
Laser Source ◽  
Optical Window ◽  
Third Harmonic ◽  
The Third ◽  
Third Harmonic Generation Microscopy

Third-harmonic generation microscopy by use of a compact, femtosecond fiber laser source

1999 ◽  
Vol 38 (36) ◽  
pp. 7393 ◽  
Author(s):  
Andrew C. Millard ◽  
Paul W. Wiseman ◽  
David N. Fittinghoff ◽  
Kent R. Wilson ◽  
Jeffrey A. Squier ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Laser Source ◽  
Third Harmonic ◽  
Third Harmonic Generation Microscopy ◽  
Femtosecond Fiber Laser

Third Harmonic Generation by Focusing Femtosecond Radiation with a Wavelength of 1032 nm in Air

2021 ◽  
pp. 35-44
Author(s):  
V.O. Gladyshev ◽  
P.P. Nikolaev ◽  
A.V. Skrabatun ◽  
E.A. Sharandin
Keyword(s):  
Laser Radiation ◽  
Femtosecond Laser ◽  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Spectral Energy ◽  
Threshold Power ◽  
Average Output ◽  
Third Harmonic ◽  
The Third ◽  
Harmonic Radiation

In open publications the results of research on the third harmonic generation in the air by femtosecond laser radiation are presented. Most of the studies have been carried out using a titanium-sapphire laser with a central emission wavelength of 800 nm. This work presents for the first time the results of studies of the third harmonic generation in the air from laser radiation with a wavelength of 1032 nm. The source of the laser radiation was an ytterbium femtosecond laser which generated pulses with duration of ~ 250 fs and a repetition rate of 1 kHz. The average output power of the laser reached 1750 mW. Maximum peak intensity of excitation laser radiation was up to 10 TW/cm2. When focusing the laser radiation its filamentation took place and was accompanied by generation of the third harmonic radiation at wavelength of 344 nm. Spectral, energy and spatial characteristics of the generated third harmonic radiation were investigated. Energy measurements were carried out up to the threshold power of pump radiation at which the competing nonlinear processes in the circuit optical elements of the experimental setup began to occur. The maximum average third harmonic emission power was 1.52 mW with a third harmonic conversion efficiency of about 0.085 %. The far-field beam pattern had a symmetric Gaussian profile with a radiation divergence of 0.11 mrad which corresponds to the diffraction quality of the beam (M2 ≈ 1)

scholarly journals Ultrafast Third-Order Nonlinear Optical Response Excited by fs Laser Pulses at 1550 nm in GaN Crystals

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3194
Author(s):  
Adrian Petris ◽  
Petronela Gheorghe ◽  
Tudor Braniste ◽  
Ion Tiginyanu
Keyword(s):  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Laser Pulses ◽  
Third Harmonic Generation ◽  
High Repetition Rate ◽  
Third Order ◽  
Third Harmonic ◽  
The Third ◽  
High Repetition ◽  
Gan Crystal

The ultrafast third-order optical nonlinearity of c-plane GaN crystal, excited by ultrashort (fs) high-repetition-rate laser pulses at 1550 nm, wavelength important for optical communications, is investigated for the first time by optical third-harmonic generation in non-phase-matching conditions. As the thermo-optic effect that can arise in the sample by cumulative thermal effects induced by high-repetition-rate laser pulses cannot be responsible for the third-harmonic generation, the ultrafast nonlinear optical effect of solely electronic origin is the only one involved in this process. The third-order nonlinear optical susceptibility of GaN crystal responsible for the third-harmonic generation process, an important indicative parameter for the potential use of this material in ultrafast photonic functionalities, is determined.

Visualization of intracellular Ca2+dynamics with third-harmonic generation microscopy

2002 ◽  
Author(s):  
R. Barille ◽  
S. Rivet ◽  
Lionel Canioni ◽  
Laurent Sarger ◽  
Pierre Vacher ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Third Harmonic ◽  
Third Harmonic Generation Microscopy

scholarly journals Efficient third-harmonic generation through tailored IR femtosecond laser pulse filamentation in air

2009 ◽  
Vol 17 (5) ◽  
pp. 3190 ◽  
Author(s):  
S. Suntsov ◽  
D. Abdollahpour ◽  
D. G. Papazoglou ◽  
S. Tzortzakis
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Harmonic Generation ◽  
Femtosecond Laser Pulse ◽  
Third Harmonic Generation ◽  
Third Harmonic

Corneal imaging by second and third harmonic generation microscopy

2008 ◽  
Author(s):  
Arnaud Brocas ◽  
Louis Jay ◽  
Eric Mottay ◽  
Isabelle Brunette ◽  
Tsuneyuki Ozaki
Keyword(s):  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Third Harmonic ◽  
Third Harmonic Generation Microscopy ◽  
Corneal Imaging
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