Acousto-optic tunable second-harmonic Talbot effect based on periodically poled LiNbO_3 crystals

2012 ◽  
Vol 29 (12) ◽  
pp. 3325 ◽  
Author(s):  
Dongmei Liu ◽  
Yong Zhang ◽  
Zhenhua Chen ◽  
Jianming Wen ◽  
Min Xiao
Keyword(s):  
Second Harmonic ◽  
Talbot Effect ◽  
Periodically Poled

scholarly journals “Seeing Is Believing”—In-Depth Analysis by Co-Imaging of Periodically-Poled X-Cut Lithium Niobate Thin Films

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 288
Author(s):  
Sven Reitzig ◽  
Michael Rüsing ◽  
Jie Zhao ◽  
Benjamin Kirbus ◽  
Shayan Mookherjea ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Second Harmonic ◽  
Imaging Techniques ◽  
Piezoresponse Force Microscopy ◽  
Periodically Poled ◽  
Near Surface ◽  
Domain Structures ◽  
Depth Analysis ◽  
Improved Performance ◽  
Quantum Optical

Nonlinear and quantum optical devices based on periodically-poled thin film lithium niobate (PP-TFLN) have gained considerable interest lately, due to their significantly improved performance as compared to their bulk counterparts. Nevertheless, performance parameters such as conversion efficiency, minimum pump power, and spectral bandwidth strongly depend on the quality of the domain structure in these PP-TFLN samples, e.g., their homogeneity and duty cycle, as well as on the overlap and penetration depth of domains with the waveguide mode. Hence, in order to propose improved fabrication protocols, a profound quality control of domain structures is needed that allows quantifying and thoroughly analyzing these parameters. In this paper, we propose to combine a set of nanometer-to-micrometer-scale imaging techniques, i.e., piezoresponse force microscopy (PFM), second-harmonic generation (SHG), and Raman spectroscopy (RS), to access the relevant and crucial sample properties through cross-correlating these methods. Based on our findings, we designate SHG to be the best-suited standard imaging technique for this purpose, in particular when investigating the domain poling process in x-cut TFLNs. While PFM is excellently recommended for near-surface high-resolution imaging, RS provides thorough insights into stress and/or defect distributions, as associated with these domain structures. In this context, our work here indicates unexpectedly large signs for internal fields occurring in x-cut PP-TFLNs that are substantially larger as compared to previous observations in bulk LN.

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.

scholarly journals Cherenkov second-harmonic Talbot effect in one-dimension nonlinear photonic crystal

2014 ◽  
Vol 39 (20) ◽  
pp. 5885 ◽  
Author(s):  
Xiaohui Zhao ◽  
Yuanlin Zheng ◽  
Huaijin Ren ◽  
Ning An ◽  
Xianfeng Chen
Keyword(s):  
Photonic Crystal ◽  
Second Harmonic ◽  
One Dimension ◽  
Talbot Effect ◽  
Nonlinear Photonic Crystal

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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