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兆赫兹重复频率飞秒径向偏振涡旋激光直接写入Yb:CaF波导激光器在连续波和脉冲模式下工作。

MHz repetition rate femtosecond radially polarized vortex laser direct writing Yb:CaF waveguide laser operating in continuous-wave and pulsed regimes.

作者信息

Liu Kaixin, Dong Yue, Zhang Zihao, Duan Xinghao, Guo Ruohao, Zhai Zhongjun, Wang Junli

机构信息

School of Physics, Xidian University, Xi'An 710071, P.R. China.

State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P.R. China.

出版信息

Nanophotonics. 2023 Dec 25;13(1):9-18. doi: 10.1515/nanoph-2023-0396. eCollection 2024 Jan.

DOI:10.1515/nanoph-2023-0396
PMID:39633991
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11501691/
Abstract

In this paper, we report the use of femtosecond radially polarized vortex laser with MHz repetition rate for direct writing of cladding waveguides (WGs) and realization of waveguide laser oscillations in ytterbium-doped calcium fluoride crystal. The negative refractive index modification in Yb:CaF crystal is fabricated by the homemade all-fiber laser amplifier. At 976 nm pump wavelength, these Yb:CaF WGs can achieve continuous-wave (CW) laser oscillation. The length of resonant cavity is 4 mm, and the minimum laser threshold is 116 mW, corresponding to the propagation loss of 0.85 dB/cm, the center wavelength of 1045.2 nm, and the maximum output power of 91 mW. In addition, a saturable absorber mirror (SAM) was prepared by depositing ReSSe on the reflective surface of a dichroic mirror to realize Q-switched waveguide laser output. The output Q-switched pulses with a tunable repetition rate in the range of 125-692.5 kHz, and the shortest pulse duration is 513 ns.

摘要

在本文中，我们报道了使用具有兆赫兹重复率的飞秒径向偏振涡旋激光直接写入包层波导（WG）以及在掺镱氟化钙晶体中实现波导激光振荡。通过自制的全光纤激光放大器在Yb:CaF晶体中制造负折射率改性。在976nm泵浦波长下，这些Yb:CaF波导可实现连续波（CW）激光振荡。谐振腔长度为4mm，最小激光阈值为116mW，对应于0.85dB/cm的传播损耗、1045.2nm的中心波长以及91mW的最大输出功率。此外，通过在二向色镜的反射表面沉积ReSSe制备了可饱和吸收镜（SAM），以实现调Q波导激光输出。输出的调Q脉冲具有125 - 692.5kHz范围内的可调重复率，最短脉冲持续时间为513ns。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/34e7c4cf8934/j_nanoph-2023-0396_fig_011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/53b0839ca6e2/j_nanoph-2023-0396_fig_001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/16b7bd56624f/j_nanoph-2023-0396_fig_002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/8396bb66662a/j_nanoph-2023-0396_fig_003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/3bbdb987b985/j_nanoph-2023-0396_fig_004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/39d826228178/j_nanoph-2023-0396_fig_005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/556d62694b85/j_nanoph-2023-0396_fig_006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/67800500ab81/j_nanoph-2023-0396_fig_007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/01b7e17b850c/j_nanoph-2023-0396_fig_008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/efc76c76b241/j_nanoph-2023-0396_fig_009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/a1a1f3e4a050/j_nanoph-2023-0396_fig_010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/34e7c4cf8934/j_nanoph-2023-0396_fig_011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/53b0839ca6e2/j_nanoph-2023-0396_fig_001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/16b7bd56624f/j_nanoph-2023-0396_fig_002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/8396bb66662a/j_nanoph-2023-0396_fig_003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/3bbdb987b985/j_nanoph-2023-0396_fig_004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/39d826228178/j_nanoph-2023-0396_fig_005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/556d62694b85/j_nanoph-2023-0396_fig_006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/67800500ab81/j_nanoph-2023-0396_fig_007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/01b7e17b850c/j_nanoph-2023-0396_fig_008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/efc76c76b241/j_nanoph-2023-0396_fig_009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/a1a1f3e4a050/j_nanoph-2023-0396_fig_010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51ab/11501691/34e7c4cf8934/j_nanoph-2023-0396_fig_011.jpg

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本文引用的文献

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Opt Express. 2019 Oct 14;27(21):30941-30951. doi: 10.1364/OE.27.030941.
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Ytterbium calcium fluoride waveguide laser.镱钙氟化物波导激光器。
Opt Express. 2019 Apr 29;27(9):12647-12658. doi: 10.1364/OE.27.012647.
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Comparative study of Yb:KYW planar waveguide lasers Q-switched by direct- and evanescent-field interaction with carbon nanotubes.镱钾钇铝石榴石平面波导激光器通过与碳纳米管的直接和倏逝场相互作用实现调Q的对比研究。
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