| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Energy scaling and extended tunability of a ring cavity terahertz parametric oscillator based on KTiOPO4 crystal |
| Yuye Wang(王与烨)1,2, Yuchen Ren(任宇琛)1,2, Degang Xu(徐德刚)1,2, Longhuang Tang(唐隆煌)1,2, Yixin He(贺奕焮)1,2, Ci Song(宋词)3, Linyu Chen(陈霖宇)1,2, Changzhao Li(李长昭)1,2, Chao Yan(闫超)1,2, Jianquan Yao(姚建铨)1,2 |
1 Institute of Laser and Optoelectronics, School of Precision Instruments and Optoelectronic Engineering, Tianjin University, Tianjin 300072, China;
2 Key Laboratory of Optoelectronic Information Science and Technology(Ministry of Education), Tianjin University, Tianjin 300072, China;
3 College of Computer and Information Engineering, Tianjin Agricultural University, Tianjin 300384, China |
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Abstract A wide terahertz tuning range from 0.96 THz to 7.01 THz has been demonstrated based on ring-cavity THz wave parametric oscillator with a KTiOPO4 (KTP) crystal. The tuning range was observed intermittently from 0.96 THz to 1.87 THz, from 3.04 THz to 3.33 THz, from 4.17 THz to 4.48 THz, from 4.78 THz to 4.97 THz, from 5.125 THz to 5.168 THz, from 5.44 THz to 5.97 THz, and from 6.74 THz to 7.01 THz. The dual-Stokes wavelengths resonance phenomena were observed in some certain tuning angle ranges. Through the theoretical analysis of the dispersion curve of the KTP crystal, the intermittent THz wave tuning range and dual-wavelength Stokes waves operation during angle tuning process were explained. The theoretical analysis was in good agreement with the experiment results. The maximum THz output voltage detected by Golay cell was 1.7 V at 5.7 THz under the pump energy of 210 mJ, corresponding to the THz wave output energy of 5.47 μJ and conversion efficiency of 2.6×10-5.
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Received: 03 July 2018
Revised: 30 July 2018
Accepted manuscript online:
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PACS:
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42.55.Tv
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(Photonic crystal lasers and coherent effects)
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42.60.By
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(Design of specific laser systems)
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42.60.Fc
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(Modulation, tuning, and mode locking)
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| Fund: Project supported by the National Basic Research Program of China (Grant Nos. 2015CB755403 and 2014CB339802), the National Key Research and Development Program of China (Grant No. 2016YFC0101001), the National Natural Science Foundation of China (Grant Nos. 61775160, 61771332, and 61471257), China Postdoctoral Science Foundation (Grant No. 2016M602954), and Postdoctoral Science Foundation of Chongqing, China (Grant No. Xm2016021). |
Corresponding Authors:
Degang Xu, Ci Song
E-mail: xudegang@tju.edu.cn;cisong@tjau.edu.cn
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Cite this article:
Yuye Wang(王与烨), Yuchen Ren(任宇琛), Degang Xu(徐德刚), Longhuang Tang(唐隆煌), Yixin He(贺奕焮), Ci Song(宋词), Linyu Chen(陈霖宇), Changzhao Li(李长昭), Chao Yan(闫超), Jianquan Yao(姚建铨) Energy scaling and extended tunability of a ring cavity terahertz parametric oscillator based on KTiOPO4 crystal 2018 Chin. Phys. B 27 114213
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