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Journal of Synthetic Crystals ›› 2026, Vol. 55 ›› Issue (1): 1-12.DOI: 10.16553/j.cnki.issn1000-985x.2025.0128

• Reviews •     Next Articles

Research Progress on Passive Q-Switched Nd3+-Doped Solid-State Lasers

PENG Zhangliang1,2(), SUN Guihua1(), ZHANG Qingli1, WANG Xiaofei1, LUO Jianqiao1   

  1. 1. Key Laboratory of Photonic Devices and Materials of Anhui Province,Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China
    2. Institute of Physical Science and Information Technology,Anhui University,Hefei 230601,China
  • Received:2025-06-16 Online:2026-01-20 Published:2026-02-05
  • Contact: SUN Guihua

Abstract: Trivalent neodymium ion (Nd3+) doped materials cover the spectral range of 0.9~1.4 μm. Based on Nd3+ doping, numerous laser materials have been developed. Near 0.9 μm band, frequency multiplier technology can convert the laser into blue light, which is used in display technology and biomedical imaging; near 1.06 μm band, the laser output belongs to a four-level system with high gain, making it easy to achieve high-power output, and being used for industrial laser cutting and laser surgery, and so on; near 1.4 μm band, it benefits from eye-safe properties, atmospheric transmission characteristics, gaining wide applications in high-precision lidar, biomedical applications and fine processing. Studies about infrared laser sources have been widely recognized over the past few decades due to their various potential applications. This review provides a detailed introduction to the pulsed laser performance of Nd3+-doped laser crystals in oxide and fluoride matrices. It also analyzes the nonlinear optical properties and application ranges of traditional saturable absorbers and emerging two-dimensional saturable absorbers. Finally, it summarizes the current research status and development trends of passive Q-switched Nd3+-doped solid-state lasers in relation to substrates and saturable absorbers and resonant cavities. We believe that this review will provide a deeper understanding of passive Q-switching Nd3+ solid lasers.

Key words: neodymium ion doping; passive Q-switching; laser crystal; saturable absorber; solid-state laser

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