Molecular to material design for anomalous-dispersion phase-matched second-harmonic generation

1991 ◽  
Author(s):  
Paul A. Cahill ◽  
David R. Tallant ◽  
Tony C. Kowalczyk ◽  
Kenneth D. Singer
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Material Design ◽  
Anomalous Dispersion ◽  
Dispersion Phase

Anomalous-dispersion phase-matched second-harmonic generation

1989 ◽  
Vol 14 (20) ◽  
pp. 1137 ◽  
Author(s):  
P. A. Cahill ◽  
K. D. Singer ◽  
L. A. King
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Anomalous Dispersion ◽  
Dispersion Phase

ULTRASHORT PULSE SECOND-HARMONIC GENERATION IN OPTIMIZED NONLINEAR POLYMER THIN FILM STRUCTURES

1994 ◽  
Vol 03 (04) ◽  
pp. 543-563 ◽  
Author(s):  
E. SIDICK ◽  
A. DIENES ◽  
A. KNOESEN
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Ultrashort Pulse ◽  
Second Harmonic ◽  
Short Pulse ◽  
Interaction Length ◽  
Polymer Thin Film ◽  
Dispersion Phase ◽  
Pulse Distortion

Methods to optimize the generation of ultrashort second harmonic pulses are investigated. The goal is to maximize the conversion efficiency while maintaining a short pulse. The first method exploits the effects of anomalous-dispersion phase-matching. In a nonlinear polymer we show that an optimum concentration of chromophore exists that maximizes the conversion efficiency without causing unacceptable pulse-spreading. In the second method we use unipolar and bipolar quasi-phase-matched (QPM) structures to increase the nonlinear interaction length. Unipolar and bipolar QPM structures not only provide significant enhancement in ultrashort pulse second harmonic generation but also reduce the pulse distortion.

scholarly journals Second-Harmonic Generation of Blue Light in GaN Waveguides

2018 ◽  
Vol 8 (8) ◽  
pp. 1218 ◽  
Author(s):  
Martin Rigler ◽  
Tinkara Troha ◽  
Wei Guo ◽  
Ronny Kirste ◽  
Isaac Bryan ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Chemical Vapor ◽  
Matching Condition ◽  
Dispersion Phase ◽  
Central Wavelength ◽  
Near Ir ◽  
Ridge Waveguides ◽  
Phase Matching Condition

Second-harmonic generation was studied in III-metal-polar GaN films grown on sapphire substrates by metalorganic chemical vapor deposition and formed into ridge waveguides. Broadband near-IR femtosecond pulses of an optical parametric amplifier system were injected by end-fire coupling and the nonlinear response was measured while tuning the central wavelength. A prominent peak was found at 450 nm for 1140 nm thick and 10 μm wide GaN waveguides. The measured second-harmonic peak was in agreement with the modal-dispersion phase matching condition calculated using the dispersion of the extraordinary refractive indices of GaN obtained by prism coupling.

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