High-power 671 nm laser by second-harmonic generation with 93% efficiency in an external ring cavity

Cui Xing-Yang; Shen Qi; Yan Mei-Chen; Zeng Chao; Yuan Tao; Zhang Wen-Zhuo; Yao Xing-Can; Peng Cheng-Zhi; Jiang Xiao; Chen Yu-Ao; Pan Jian-Wei

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High-power 671 nm laser by second-harmonic generation with 93% efficiency in an external ring cavity

机译：通过二次谐波产生高功率671nm激光，在外部环腔中具有93％的效率

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Second-harmonic generation (SHG) is useful for obtaining single-frequency continuous-wave laser sources at various wavelengths for applications ranging from biology to fundamental physics. Using an external power-enhancement cavity is an effective approach to improve the frequency conversion efficiency. However, thermal effects limit the efficiency, particularly, in high-power operation. Therefore, reducing thermal effects is important when designing a cavity. This Letter reports the use of an external ring cavity for SHG, yielding a 5.2 W, 671 nm laser light with a conversion efficiency of 93.8 +/- 0.8% which, to the best of our knowledge, is a new record of conversion efficiency for an external ring cavity. It is achieved using a 10 mm length periodically poled potassium titanyl phosphate crystal and a 65 mu m radius beam waist in the cavity so as to minimize thermal dephasing and thermal lensing. Furthermore, a method is developed to determine a conversion efficiency more accurately based on measuring the pump depletion using a photodiode detector and a maximum pump depletion up to 97% is recorded. In this method, the uncertainty is much less than that achieved in a common method by direct measuring with a power meter. (C) 2018 Optical Society of America

机译：二次谐波产生（SHG）可用于在各种波长下获得单频连续波激光源，用于从生物学到基本物理学的应用。使用外部电力增强腔是提高频率转换效率的有效方法。然而，热效应限制了效率，特别是在大功率操作中。因此，在设计腔时，减少热效应是重要的。这封信报告了使用外部环形腔的SHG，产生5.2 W，671个M激光，转换效率为93.8 +/- 0.8％，这是我们的知识，是一种新的转换效率的记录外环腔。使用10mm长度定期抛光钾钛基磷酸盐晶体和腔中的65μm半径梁腰部实现，以便最小化热除颤和热透镜。此外，开发了一种方法以基于测量使用光电二极管检测器的泵耗尽来确定转换效率，并且记录最大泵耗竭97％。在该方法中，不确定度远小于通过用功率计直接测量的常用方法实现。（c）2018年光学学会

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来源
《Optics Letters》 |2018年第8期|共4页
作者
Cui Xing-Yang; Shen Qi; Yan Mei-Chen; Zeng Chao; Yuan Tao; Zhang Wen-Zhuo; Yao Xing-Can; Peng Cheng-Zhi; Jiang Xiao; Chen Yu-Ao; Pan Jian-Wei;
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作者单位

Univ Sci &

Technol China Natl Lab Phys Sci Microscale Shanghai Branch Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Natl Lab Phys Sci Microscale Shanghai Branch Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Natl Lab Phys Sci Microscale Shanghai Branch Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Natl Lab Phys Sci Microscale Shanghai Branch Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Natl Lab Phys Sci Microscale Shanghai Branch Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Natl Lab Phys Sci Microscale Shanghai Branch Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Natl Lab Phys Sci Microscale Shanghai Branch Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Natl Lab Phys Sci Microscale Shanghai Branch Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Natl Lab Phys Sci Microscale Shanghai Branch Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Natl Lab Phys Sci Microscale Shanghai Branch Hefei 230026 Anhui Peoples R China;

Univ Sci &

Technol China Natl Lab Phys Sci Microscale Shanghai Branch Hefei 230026 Anhui Peoples R China;

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正文语种 eng
中图分类计量学;光学;
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1. High-power 671 nm laser by second-harmonic generation with 93% efficiency in an external ring cavity [J] . Cui Xing-Yang, Shen Qi, Yan Mei-Chen, Optics Letters . 2018,第8期

机译：通过二次谐波产生高功率671nm激光，在外部环腔中具有93％的效率
2. Second-harmonic generation of 405-nm light using periodically poled KTiOPO_4 pumped by external-cavity laser diode with double grating feedback [J] . E. SAMSOE, P.M. PETERSEN, S. ANDERSSON-ENGELS, Applied physics. B, Lasers and optics . 2005,第7期

机译：使用具有双光栅反馈的外腔激光二极管泵浦的周期性极化KTiOPO_4二次谐波产生405 nm光
3. Single-pass UV generation at 222.5 nm based on high-power GaN external cavity diode laser [J] . Ruhnke N., Mueller A., Eppich B., Optics Letters . 2015,第9期

机译：基于高功率GaN外腔二极管激光器的222.5 nm单程紫外光产生
4. Generation of more than 300 mW diffraction-limited light at 405 nm by second-harmonic generation of a tapered diode laser with external cavity feedback [C] . Ole Bjarlin Jensen, Jesper Holm, Bemd Sumpf, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VI; Proceedings of SPIE-The International Society for Optical Engineering; vol.6455 . 2007

机译：通过二次谐波产生带有外腔反馈的锥形二极管激光器，在405 nm处产生超过300 mW的衍射极限光
5. Novel cavities and functionality in high-power highbrightness semiconductor vertical external cavity surface emitting lasers. [D] . Hessenius, Chris. 2013

机译：大功率高亮度半导体垂直外腔表面发射激光器中的新型腔体和功能。
6. Spectrally narrowed external-cavity high-power stack of laser diode arrays [O] . H. Zhu, I. C. Ruset, F. W. Hersman -1

机译：光谱缩小的外腔大功率激光二极管阵列堆栈
7. Generation of more than 300 mW diffraction-limited light at 405 nm by second-harmonic generation of a tapered diode laser with external cavity feedback [O] . Jensen Ole Bjarlin, Holm J., Sumpf B., 2007

机译：通过具有外腔反馈的锥形二极管激光器的二次谐波产生，在405nm处产生超过300mW的衍射限制光

High-power 671 nm laser by second-harmonic generation with 93% efficiency in an external ring cavity

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