Enhancement of two-wave mixing gain coefficient by resonant mechanism in photorefractive semiconductor

Optik ◽  
2021 ◽  
Vol 247 ◽  
pp. 167894
Author(s):  
Yan Zhao ◽  
Chuanyi Tao ◽  
Jianjun Xiao ◽  
Hao Wang ◽  
Xuhai Jiang
Keyword(s):  
Gain Coefficient ◽  
Wave Mixing ◽  
Two Wave Mixing ◽  
Resonant Mechanism

ENERGY TRANSFER BETWEEN LIGHT WAVES IN NONLINEAR MEDIA WITH TWO DIFFERENT RESPONSE TIMES

1999 ◽  
Vol 13 (16) ◽  
pp. 541-546
Author(s):  
C. W. A. PASCHOAL ◽  
J. C. PENAFORTE ◽  
I. GUEDES
Keyword(s):  
Response Times ◽  
Dynamical Behavior ◽  
Gain Coefficient ◽  
Wave Mixing ◽  
Probe Wave ◽  
Debye Relaxation ◽  
Light Waves ◽  
Pump And Probe ◽  
Two Wave Mixing ◽  
Different Response

In this work we extend the conventional theory of the two-wave mixing in Kerr-like media, in order to take into account two different contributions to nonlinear gain. To this end, we use a modified Debye relaxation relation to obtain the dynamical behavior of the nonlinearity and consequently, derive the expressions for pump and probe wave intensities. The two-wave mixing gain coefficient Γ1 is calculated as a function of several parameters.

KLTN Self-Pumped Phase Conjugation

1993 ◽  
Vol 329 ◽  
Author(s):  
Jiangqian Wei ◽  
Qingcai Guan ◽  
Jiyang Wang ◽  
Xuefeng Yue ◽  
Zongshu Shao ◽  
...  
Keyword(s):  
Response Time ◽  
Phase Conjugation ◽  
Lithium Tantalate ◽  
Gain Coefficient ◽  
Wave Mixing ◽  
Continuous Laser ◽  
Two Wave Mixing ◽  
First Time

AbstractHomogenous tetragonal potassium lithium tantalate niobate (KLTN) crystals were grown using the flux pulling method. A two-wave-mixing gain coefficient of 0.5cm−1 has been measured using undoped KLTN. The gain coefficient can be increased to 2.7 cm−1 after doping of 0.2wt% Fe. The “cat” self-pumped phase conjugator was performed, for the first time, with KLTN:Fe crystal. We obtained a reflectivity of 14% and a response time less than 3 seconds using a frequency-doubled Nd:YAG quasi-continuous laser.

Homodyne detection of ultrasonic surface displacements using two-wave mixing in photorefractive polymers

1999 ◽  
Author(s):  
Marvin B. Klein ◽  
Gerald D. Bacher ◽  
Anders Grunnet-Jepsen ◽  
Daniel Wright ◽  
William E. Moerner
Keyword(s):  
Wave Mixing ◽  
Homodyne Detection ◽  
Surface Displacements ◽  
Photorefractive Polymers ◽  
Two Wave Mixing

Impact of donor compensation ratio on photorefractive two–wave mixing dynamics in multiple quantum wells structures

2014 ◽  
Vol 23 (03) ◽  
pp. 1450029 ◽  
Author(s):  
Błażej Jabłoński
Keyword(s):  
Quantum Wells ◽  
Concentration Ratio ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Wave Mixing ◽  
Compensation Ratio ◽  
Mixing Dynamics ◽  
Two Wave Mixing ◽  
Charge Field ◽  
The Impact

The kind of defects and their concentration have a significant impact on photorefractive phenomena taking place within the structure of semi-insulating GaAs / AlGaAs multiple quantum wells. In this paper, the impact of donor-to-acceptor concentration ratio on the grating in photorefractive two-waves mixing was examined. The formation of the space charge field for different defect concentrations as well as different external electric field intensities are analyzed.

Nondegenerate two-wave mixing in GdAlO_3:Cr^3+

1991 ◽  
Vol 16 (7) ◽  
pp. 452 ◽  
Author(s):  
J. C. Penaforte ◽  
E. A. Gouveia ◽  
S. C. Zilio
Keyword(s):  
Wave Mixing ◽  
Two Wave Mixing
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