首页> 外文会议>Frontiers in ultrafast optics: biomedical, scientific, and industrial applications XVII >Multiphoton signal increase due to repetition rate doubling in a photonic crystal rod
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Multiphoton signal increase due to repetition rate doubling in a photonic crystal rod

机译:由于光子晶体棒中重复率加倍,多光子信号增加

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Multiphoton microscopy (MPM) has benefitted dramatically from the development of fiber-based technology. Among these technologies, soliton self-frequency shift (SSFS) in photonic crystal (PC) rods uniquely combines high soliton energy (~100 nJ) and broad wavelength tuning range (>100 nm). Recently, high-energy, 1700-nm femtosecond pulses generated by SSFS in a PC rod enabled 3-photon microscopy of mouse hippocampus in vivo. Below damage threshold, acquisition speed is proportional to the repetition rate of the laser. Here we demonstrate a technique for increasing the soliton repetition rate in a PC rod. Through polarization division and polarization multiplexing, we can double the repetition rate of the optical solitons generated in a PC rod. The orthogonally polarized solitons have virtually the same spectrum, pulse width and energy. As an application, we demonstrate that compared with single-polarization soliton, imaging signals are increased by two fold in MPM using our technology, corresponding to the repetition rate doubling of the optical solitons. We expect this technology will help increase the imaging speed or signal levels in MPM. Besides, this technology may overcome the signal generation limit due to the maximum available soliton energy from solid-core PC rods.
机译:多光子显微镜(MPM)从基于纤维的技术发展中受益匪浅。在这些技术中,光子晶体(PC)棒中的孤子自频移(SSFS)独特地结合了高孤子能量(〜100 nJ)和宽波长调谐范围(> 100 nm)。最近,由PCFS棒中的SSFS产生的高能1700 nm飞秒脉冲使小鼠海马体内的3光子显微镜成为可能。低于损坏阈值,采集速度与激光器的重复率成正比。在这里,我们演示了一种增加PC棒中孤子重复率的技术。通过偏振分割和偏振复用,我们可以将PC棒中产生的光学孤子的重复率提高一倍。正交极化的孤子几乎具有相同的光谱,脉冲宽度和能量。作为一种应用,我们证明了与单偏振孤子相比,使用我们的技术在MPM中成像信号增加了两倍,相当于光学孤子的重复率增加了一倍。我们希望这项技术将有助于提高成像速度或MPM中的信号水平。此外,由于来自实芯PC棒的最大可用孤子能量,该技术可以克服信号生成限制。

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