Second harmonic generation from precise diamond blade diced ridge waveguides
Hui Xu(徐慧)1, Ziqi Li(李子琦)1,2, Chi Pang(逄驰)1, Rang Li(李让)1,3, Genglin Li(李庚霖)1, Sh. Akhmadaliev3, Shengqiang Zhou(周生强)3, Qingming Lu(路庆明)4, Yuechen Jia(贾曰辰)1,†, and Feng Chen(陈峰)1
1 School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China; 2 Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore; 3 Institute of Ion Beam and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01314, Germany; 4 School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
Abstract Carbon ion irradiation and precise diamond blade dicing are applied to fabricate Nd:GdCOB ridge waveguides. The propagation properties of the fabricated Nd:GdCOB waveguides are investigated through experiments and theoretical analysis. Micro-Raman analysis reveals that the Nd:GdCOB crystal lattice expands during the irradiation process. Micro-second harmonic spectroscopic analysis suggests that the original nonlinear properties of the Nd:GdCOB crystal are greatly enhanced within the waveguide volume. Under pulsed 1064 nm laser pumping, second harmonic generation (SHG) at 532 nm has been achieved in the fabricated waveguides. The maximum SHG conversion efficiencies are determined to be ～ 8.32 %·W-1 and ～ 22.36 %·W-1 for planar and ridge waveguides, respectively.
Fund: Project supported by the Taishan Scholars Youth Expert Program of Shandong Province and the Qilu Young Scholar Program of Shandong University, China.
Hui Xu(徐慧), Ziqi Li(李子琦), Chi Pang(逄驰), Rang Li(李让), Genglin Li(李庚霖), Sh. Akhmadaliev, Shengqiang Zhou(周生强), Qingming Lu(路庆明), Yuechen Jia(贾曰辰), and Feng Chen(陈峰) Second harmonic generation from precise diamond blade diced ridge waveguides 2022 Chin. Phys. B 31 094209
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