Second harmonic generation with surface guided waves in signal processing geometries

1983 ◽  
Vol 54 (11) ◽  
pp. 6213-6217 ◽  
Author(s):  
C. Liao ◽  
P. Bundman ◽  
G. I. Stegeman
Keyword(s):  
Signal Processing ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Guided Waves ◽  
Second Harmonic

Cumulative Second Harmonic Generation of Ultrasonic Guided Waves Propagation in Tube-Like Structure

2016 ◽  
Vol 24 (03) ◽  
pp. 1650011 ◽  
Author(s):  
Weibin Li ◽  
Mingxi Deng ◽  
Younho Cho
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Polyvinylidene Fluoride ◽  
Guided Waves ◽  
Second Harmonic ◽  
Cumulative Effect ◽  
Guided Wave ◽  
Ultrasonic Waves ◽  
Material Nonlinearity ◽  
Fundamental Wave

Second harmonic generation of ultrasonic waves propagating in unbounded media and plate-like structure has been vigorously studied for tracking material nonlinearity, however, second harmonic guided wave propagation in tube-like structures is rarely studied. Considering that second harmonics can provide sensitive information for structural health condition, this paper aims to study the second harmonic generation of guided waves in metallic tube-like structures with weakly nonlinearity. Perturbation method and modal analysis approach are used to analyze the acoustic field of second harmonic solutions. The conditions for generating second harmonics with cumulative effect are provided in present investigation. Flexible polyvinylidene fluoride comb transducers are used to measure fundamental wave modes and second harmonic ones. The work experimentally verifies that the second harmonics of guided waves in pipe have a cumulative effect with propagation distance. The proposed procedure of this work can be applied to detect material nonlinearity due to damage mechanism in tube-like structure.

Large and anisotropic second harmonic generation of V-V binary phosphorene derivative with permanent dipole

2021 ◽  
Author(s):  
Yadong Wei ◽  
Songsong Wang ◽  
Kaijuan Pang ◽  
Xiaodong Xu ◽  
Ngeywo Tolbert Kaner ◽  
...  
Keyword(s):  
Signal Processing ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
2D Materials ◽  
Optical Nonlinearity ◽  
Optical Signal ◽  
Two Dimensional ◽  
All Optical ◽  
Intense Research

Optical nonlinearity of two-dimensional (2D) materials with permanent dipole is a subject of intense research in the fields ranging from all-optical signal processing to laser nanotechnology due to the potential...

QUASI-PHASE-MATCHED SECOND-HARMONIC GENERATION IN NONLINEAR OPTICAL POLYMER WAVEGUIDE

2004 ◽  
Vol 13 (03n04) ◽  
pp. 383-389 ◽  
Author(s):  
JUNG JIN JU ◽  
SEUNG KOO PARK ◽  
JUNG YUN DO ◽  
SUNTAK PARK ◽  
MIN-SU KIM ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Guided Waves ◽  
Second Harmonic ◽  
Device Fabrication ◽  
Polymer Waveguide ◽  
Material Development ◽  
Optical Polymer ◽  
Waveguide Design ◽  
Nonlinear Optical Polymer

We address issues related to quasi-phase-matched (QPM) second-harmonic generation (SHG) in nonlinear polymer waveguide for applying at optical communication. This field of research is very challenging because the high nonlinearity of polymers leads the device to operate at low pump power levels. However, key problems to this approach include difficulty of phase matching, the high propagation losses of the guided waves, and low nonlinearity contrast in the +/0 type QPM geometry. By optimizing these points on material development, waveguide design, and device fabrication, we demonstrate a QPM SHG with the best efficiency in polymer waveguide.

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