Nonlinear evolution of laser pulses in lithium niobate waveguide arrays

2011 ◽  
Author(s):  
Frank Setzpfandt ◽  
Andrey A. Sukhorukov ◽  
Dragomir N. Neshev ◽  
Roland Schiek ◽  
Alexander S. Solntsev ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Nonlinear Evolution ◽  
Laser Pulses ◽  
Waveguide Arrays

scholarly journals Nearly Single-Cycle Terahertz Pulse Generation in Aperiodically Poled Lithium Niobate

Photonics ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 9 ◽  
Author(s):  
Yuri Avetisyan ◽  
Masayoshi Tonouchi
Keyword(s):  
Lithium Niobate ◽  
Field Strength ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Pulse Generation ◽  
Closed Form Expression ◽  
Single Cycle ◽  
Opposite Case ◽  
Pulse Form ◽  
Domain Length

In the present work, an opportunity of nearly single-cycle THz pulse generation in aperiodically poled lithium niobate (APPLN) crystal is studied. A radiating antenna model is used to simulate the THz generation from chirped APPLN crystal pumped by a sequence of femtosecond laser pulses with chirped delays (m = 1, 2, 3 …) between adjacent pulses. It is shown that by appropriately choosing Δtm, it is possible to obtain temporal overlap of all THz pulses generated from positive (or negative) domains. This results in the formation of a nearly single-cycle THz pulse if the chirp rate of domain length δ in the crystal is sufficiently large. In the opposite case, a few cycle THz pulses are generated with the number of the cycles depending on δ. The closed-form expression for the THz pulse form is obtained. The peak THz electric field strength of 0.3 MV/cm is predicted for APPLN crystal pumped by a sequence of laser pulses with peak intensities of the separate pulse in the sequence of about 20 GW/cm2. By focusing the THz beam and increasing the pump power, the field strength can reach values in the order of few MV/cm.

Bandstructure measurements of lithium niobate waveguide arrays

2011 ◽  
Author(s):  
Frank Setzpfandt ◽  
Matthias Falkner ◽  
Roland Schiek ◽  
Falk Eilenberger ◽  
Ekaterina Pshenay-Severin ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Waveguide Arrays

scholarly journals Terahertz generation in lithium niobate driven by Ti:sapphire laser pulses and its limitations

2014 ◽  
Vol 39 (18) ◽  
pp. 5403 ◽  
Author(s):  
Xiaojun Wu ◽  
Sergio Carbajo ◽  
Koustuban Ravi ◽  
Frederike Ahr ◽  
Giovanni Cirmi ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Laser Pulses ◽  
Terahertz Generation ◽  
Ti:Sapphire Laser

Surface Modification Induced by Femtosecond Laser Pulses in Lithium Niobate

2011 ◽  
Vol 142 ◽  
pp. 134-137
Author(s):  
Hong Yun Chen ◽  
Zhen Zhu Wan ◽  
Yan Ling Han
Keyword(s):  
Surface Modification ◽  
Lithium Niobate ◽  
Femtosecond Laser ◽  
Laser Energy ◽  
Laser Pulses ◽  
Sample Surface ◽  
Femtosecond Laser Pulses ◽  
Two Dimensional ◽  
Damage Depth ◽  
Transparent Materials

The interaction between femtoseocnd laser and transparent materials has been studied intensively in recent years. When the femtosecond laser was focused onto the surface of the transparent materials, if the laser fluence applied to the sample exceeds the material’s fluence threshold, ablation occurs. In this paper, we study the surface ablation of lithium niobate by femtosecond laser. We produced a two-dimensional array of voids in the sample surface by varying the number of shots and laser energy, and analyze of the damage depth with the relation to the pulse energy and the number of the pulse. It has important reference on the microfabrication in such materials by femtosecond laser.

Ablation induced by single-and multiple-femtosecond laser pulses in lithium niobate

Laser Physics ◽  
2007 ◽  
Vol 17 (12) ◽  
pp. 1378-1381 ◽  
Author(s):  
H. Chen ◽  
X. Chen ◽  
Y. Zhang ◽  
Y. Xia
Keyword(s):  
Lithium Niobate ◽  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses
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