Dynamically tailoring nonlinear Cherenkov radiation in PPLN by structured fundamental wave

2017 ◽  
Vol 26 (04) ◽  
pp. 1750041 ◽  
Author(s):  
Xiangling Fang ◽  
Haigang Liu ◽  
Xiaohui Zhao ◽  
Yuanlin Zheng ◽  
Xianfeng Chen
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Frequency Conversion ◽  
Second Harmonic ◽  
Harmonic Wave ◽  
Fundamental Wave ◽  
Nonlinear Frequency ◽  
Periodically Poled ◽  
Nonlinear Frequency Conversion ◽  
Good Agreement

We numerically and experimentally investigated the Cherenkov-type second harmonic generation of structured fundamental wave, whose phase was periodically modulated, in periodically poled nonlinear crystals. The Cherenkov-type second harmonic generation with different parameters of the structured fundamental wave was investigated. The experimental results are in good agreement with the theoretical analysis. This study provides a method of dynamically tailoring the Cherenkov-type second harmonic wave and also has potential application in other nonlinear frequency conversion processes.

scholarly journals Phase-matched nonlinear second-harmonic generation in plasmonic metasurfaces

Nanophotonics ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 607-612 ◽  
Author(s):  
S. Hamed Shams Mousavi ◽  
Robert Lemasters ◽  
Feng Wang ◽  
Ali Eshaghian Dorche ◽  
Hossein Taheri ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Frequency Conversion ◽  
Second Harmonic ◽  
Matching Condition ◽  
Phase Matching ◽  
Nonlinear Frequency ◽  
Nonlinear Frequency Conversion ◽  
Phase Matching Condition ◽  
Plasmon Modes

AbstractThe phase matching between the propagating fundamental and nonlinearly generated waves plays an important role in the efficiency of the nonlinear frequency conversion in macroscopic crystals. However, in nanoscale samples, such as nanoplasmonic structures, the phase-matching condition is often ignored due to the sub-wavelength nature of the materials. Here, we first show that the phase matching of the lattice plasmon modes at the fundamental and second-harmonic frequencies in a plasmonic nanoantenna array can effectively enhance the surface-enhanced second-harmonic generation. Additionally, a significant enhancement of the second-harmonic generation is demonstrated using stationary band-edge lattice plasmon modes with zero phase.

OPTIMAL DESIGN OF APERIODIC OPTICAL SUPERLATTICES FOR ACHIEVING PARAMETRIC AMPLIFICATION OR SECOND HARMONIC GENERATION WITH CONSIDERATION OF THE DEPLETION OF PUMPING LIGHT POWER

2005 ◽  
Vol 14 (01) ◽  
pp. 115-131 ◽  
Author(s):  
LI-MING ZHAO ◽  
BEN-YUAN GU ◽  
GUO-ZHEN YANG ◽  
YUN-SONG ZHOU
Keyword(s):  
Optimal Design ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Light Wave ◽  
Second Harmonic ◽  
Harmonic Wave ◽  
Parametric Amplification ◽  
Fundamental Wave ◽  
Light Power ◽  
Multiple Wavelength

The parametric amplification (PA) and second harmonic generation (SHG) from quasi-one-dimensional aperiodic optical superlattices (AOSs) are investigated in the cases of large, intermediate, and small signals of the pumping light wave. The optimal design of the AOSs is carried out with the use of the simulated annealing (SA) method. The numerical simulations show that the constructed AOSs can achieve multiple wavelength PA (or SHG) with identical amplification (or identical conversion efficiency) at the pre-assigned wavelengths. The variations of the normalized intensities of the PA signal (or the pumping fundamental wave (PFW)) for the PA process with the distance of propagation of the light wave from the interface of the AOSs at the pre-assigned wavelengths exhibit monotonically increasing (or decreasing) behavior. So do the variations of the normalized intensities of the second harmonic wave (SHW) (or the fundamental wave (FW)) for the SHG. This strongly supports the fact that the contribution of each individual unit domain in the constructed samples to the PA (or SHG) is constructive accumulation, favorable for the PA (or SHG) process. The saturation phenomenon of the PA (or SHG) signal is observed.

POLARIZATION INSENSITIVE QUASI-PHASE-MATCHED SECOND HARMONIC GENERATION

2011 ◽  
Vol 20 (02) ◽  
pp. 129-136 ◽  
Author(s):  
XIAO-SHI SONG ◽  
QIN WANG ◽  
ZI-YAN YU ◽  
FEI XU ◽  
YAN-QING LU
Keyword(s):  
Second Harmonic Generation ◽  
Electric Fields ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Polarization State ◽  
Induce Polarization ◽  
Fundamental Wave ◽  
Periodically Poled ◽  
Periodically Poled Lithium Niobate ◽  
Polarization Insensitive

Polarization insensitive second harmonic generation (SHG) is proposed in an electro-optic (EO) tunable periodically poled Lithium Niobate (PPLN). The PPLN consists of four sections. External electric fields could be selectively applied to them to induce polarization rotation between the ordinary and extraordinary waves. If the domain structure is well-designed, the fundamental wave with an arbitrary polarization state can be frequency doubled efficiently in this special PPLN.

EFFICIENT GENERATION OF COHERENT BLUE AND GREEN LIGHT BASED ON FREQUENCY CONVERSION IN KTiOPO4 CRYSTALS

2000 ◽  
Vol 09 (01) ◽  
pp. 21-53 ◽  
Author(s):  
YUJIE J. DING ◽  
XIAODONG MU ◽  
XINHUA GU
Keyword(s):  
Second Harmonic Generation ◽  
Blue Light ◽  
Harmonic Generation ◽  
Frequency Conversion ◽  
Second Harmonic ◽  
Green Light ◽  
Damage Threshold ◽  
Periodically Poled ◽  
Efficient Generation ◽  
Short Period

We review our recent results on efficient generation of coherent blue/green light based on different configurations and structures. We have used second-harmonic generation with forward or backward configuration in short-period periodically-poled bulk and wave-guide KTP to generate blue light. We have used backward second-harmonic generation to characterize periodically-segmented submicron KTP waveguides. By cascading second-harmonic generation and subsequent sum-frequency generation, we have generated coherent blue light in KTP and/or Ce:KTP crystals. We have also studied damage threshold of bulk KTP; we hope that we can eventually use it towards efficient generation of cw coherent green light.

scholarly journals Noise Analysis of Second-Harmonic Generation in Undoped and MgO-Doped Periodically Poled Lithium Niobate

2008 ◽  
Vol 2008 ◽  
pp. 1-10 ◽  
Author(s):  
Yong Wang ◽  
Jorge Fonseca-Campos ◽  
Wan-guo Liang ◽  
Chang-Qing Xu ◽  
Ignacio Vargas-Baca
Keyword(s):  
Lithium Niobate ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Fundamental Wave ◽  
Sh Wave ◽  
Periodically Poled ◽  
Periodically Poled Lithium Niobate ◽  
Noise Characteristics ◽  
532 Nm

Noise characteristics of second-harmonic generation (SHG) in periodically poled lithium niobate (PPLN) using the quasiphase matching (QPM) technique are analyzed experimentally. In the experiment, a0.78 μm second-harmonic (SH) wave was generated when a 1.56 μm fundamental wave passed through a PPLN crystal (bulk or waveguide). The time-domain and frequency-domain noise characteristics of the fundamental and SH waves were analyzed. By using the pump-probe method, the noise characteristics of SHG were further analyzed when a visible light (532 nm) and an infrared light (1090 nm) copropagated with the fundamental light, respectively. The noise characterizations were also investigated at different temperatures. It is found that for the bulk and waveguide PPLN crystals, the SH wave has a higher relative noise level than the corresponding fundamental wave. For the same fundamental wave, the SH wave has lower noise in a bulk crystal than in a waveguide, and in MgO-doped PPLN than in undoped PPLN. The 532 nm irradiation can lead to higher noise in PPLN than the 1090 nm irradiation. In addition, increasing temperature of device can alleviate the problem of noise in conjunction with the photorefractive effect incurred by the irradiation light. This is more significant in undoped PPLN than in MgO-doped one.

scholarly journals Second Harmonic Generation Using an All-Fiber Q-Switched Yb-Doped Fiber Laser and MgO:c-PPLN

2008 ◽  
Vol 2008 ◽  
pp. 1-6 ◽  
Author(s):  
Yi Gan ◽  
Xijia Gu ◽  
Joyce Y. C. Koo ◽  
Wanguo Liang ◽  
Chang-qing Xu
Keyword(s):  
Second Harmonic Generation ◽  
Fiber Laser ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Laser System ◽  
Average Output ◽  
Periodically Poled ◽  
Theoretical Simulation ◽  
Periodically Poled Lithium Niobate ◽  
532 Nm

We have experimentally demonstrated an efficient all-fiber passively Q-switched Yb-doped fiber laser with Samarium doped fiber as a saturable absorber. Average output power of 3.4 W at a repetition rate of 250 kHz and a pulse width of 1.1 microseconds was obtained at a pump power of 9.0 W. By using this fiber laser system and an MgO-doped congruent periodically poled lithium niobate (MgO:c-PPLN), second harmonic generation (SHG) output at 532 nm was achieved at room temperature. The conversion efficiency is around 4.2% which agrees well with the theoretical simulation.

Second-harmonic generation in a periodically poled congruent LiTaO3 sample with phase-tuned nonlinear Cherenkov radiation

2012 ◽  
Vol 100 (2) ◽  
pp. 022905 ◽  
Author(s):  
Huang Huang ◽  
Cheng-Ping Huang ◽  
Chao Zhang ◽  
Ding Zhu ◽  
Xu-Hao Hong ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Cherenkov Radiation ◽  
Second Harmonic ◽  
Periodically Poled
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