Short Pulse Optical Parametric Processes with Group velocity Mismatch and Quasi-Phase Matching

2002 ◽  
Author(s):  
Bedros B. Afeyan ◽  
M. M. Fejer
Keyword(s):  
Group Velocity ◽  
Short Pulse ◽  
Phase Matching ◽  
Optical Parametric ◽  
Group Velocity Mismatch ◽  
Quasi Phase Matching ◽  
Parametric Processes ◽  
Velocity Mismatch

Numerical Analysis of Short Pulse Optical Parametric Amplification Using Type I Phase Matching

2004 ◽  
Vol 9 (1) ◽  
pp. 39-53 ◽  
Author(s):  
A. Dement’ev ◽  
O. Vrublevskaja ◽  
V. Girdauskas ◽  
R. Kazragytė
Keyword(s):  
Numerical Analysis ◽  
Second Harmonic ◽  
Short Pulse ◽  
Phase Matching ◽  
Optical Parametric Amplification ◽  
Type I ◽  
Axially Symmetric ◽  
Optical Parametric ◽  
Group Velocity Mismatch ◽  
Velocity Mismatch

The possibilities of efficient amplification and additional shortening of faster moving short fundamental harmonic pulses by the more slowly moving longer second harmonic pulses for type I phase matching are numerically analyzed for initially collimated axially symmetric beams, taking into account diffraction, group velocity mismatch and dispersion of the pulses.

scholarly journals Lumped Dissipation Induced Quasi-Phase Matching for Broad and Flat Optical Parametric Processes

2019 ◽  
Vol 11 (6) ◽  
pp. 1-8
Author(s):  
Hanwen Hu ◽  
Lei Zhang ◽  
Chi Zhang ◽  
Yuntian Chen ◽  
Jing Xu ◽  
...  
Keyword(s):  
Phase Matching ◽  
Optical Parametric ◽  
Quasi Phase Matching ◽  
Parametric Processes

ULTRA-SHORT PULSE NONLINEAR OPTICS: SECOND HARMONIC GENERATION AND SUM FREQUENCY GENERATION WITHOUT GROUP VELOCITY MISMATCH BROADENING

1996 ◽  
Vol 05 (03) ◽  
pp. 477-494 ◽  
Author(s):  
Y.B. BAND ◽  
M. TRIPPENBACH ◽  
C. RADZEWICZ ◽  
J.S. KRASINSKI
Keyword(s):  
Group Velocity ◽  
Second Harmonic ◽  
Short Pulse ◽  
Extraordinary Wave ◽  
Nonlinear Frequency ◽  
Interferometric Technique ◽  
Rutile Crystal ◽  
Group Velocity Mismatch ◽  
Frequency Generation ◽  
Velocity Mismatch

The propagation of short pulses in nonisotropic nonlinear optical media involves new phenomena not encountered in the propagation of longer pulses. We describe two such phenomena here. Specifically, (a) we demonstrate a new method of nonlinear frequency generation for femtosecond light pulses that alleviates group velocity mismatch broad-ening in the generation of second harmonic pulses that are shorter than the input fundamental pulses. The method relies on non-collinear phase-matching and group-velocity-matching. Using our method, we generated 28 fs second harmonic pulses from 33 fs 800 nm fundamental pulses. (b) We show that an optical wavepacket propagating as an extraordinary wave in a non-isotropic dispersive medium experiences a rotation (or tilt) about an axis perpendicular to the propagation vector. We measured the tilting of a femtosecond laser wavepacket in a birefringent rutile crystal. The measurements were carried out using a linear interferometric technique which, in contrast to nonlinear correlation techniques, allows measurement at very low power. A 23 fs delay between the left and right parts of a 30 fs, 800 nm wavepacket was measured for a 1 mm thick rutile crystal.

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