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<p>In this work, the development of a novel ultra-short laser system is presented, building upon previous research in passive mode-locking using cross-amplitude modulation (XAM). By combining XAM with cascaded second-order nonlinearity mode-locking (CSM) the system produced a stable bright-dark two-color output with picosecond pulses and a repetition rate of 275&#xa0;MHz with an average output power of 100 mW for an 808&#xa0;nm pump power of 4&#xa0;W. The experimental setup involved two Nd: YVO<sub>4</sub> lasers operating at 1064&#xa0;nm and 1342&#xa0;nm, where the two cavities were interconnected with a dichroic mirror allowing for a shared section where a periodically poled KTiOPO<sub>4</sub> (PPKTP) was introduced. In the separate sections, the independently diode-pumped laser crystals were placed. The enhanced intra-cavity intensity achieved through XAM enabled effective pulse compression via CSM. The results demonstrate the system’s ability to generate near-transform-limited pulses as short as 14 ps, offering potential for applications such as medical imaging and LIDAR.</p>

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Generation of picosecond pulses using soliton compression in a dual cavity laser

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月1日

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  • Martin Brunzell,
  • Max Widarsson,
  • Fredrik Laurell,
  • Valdas Pasiskevicius

摘要

In this work, the development of a novel ultra-short laser system is presented, building upon previous research in passive mode-locking using cross-amplitude modulation (XAM). By combining XAM with cascaded second-order nonlinearity mode-locking (CSM) the system produced a stable bright-dark two-color output with picosecond pulses and a repetition rate of 275 MHz with an average output power of 100 mW for an 808 nm pump power of 4 W. The experimental setup involved two Nd: YVO4 lasers operating at 1064 nm and 1342 nm, where the two cavities were interconnected with a dichroic mirror allowing for a shared section where a periodically poled KTiOPO4 (PPKTP) was introduced. In the separate sections, the independently diode-pumped laser crystals were placed. The enhanced intra-cavity intensity achieved through XAM enabled effective pulse compression via CSM. The results demonstrate the system’s ability to generate near-transform-limited pulses as short as 14 ps, offering potential for applications such as medical imaging and LIDAR.