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Scalable fiber-based femtosecond laser systems and applications.

机译：可扩展的基于光纤的飞秒激光系统和应用。

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摘要

Femtosecond Yb-fiber-based modelocked laser and amplifier systems are developed. Various approaches have been employed to increase the laser system's scalability in terms of repetition rate, wavelength and average power.; Passive harmonic modelocking, for the first time, is demonstrated in a modelocked Yb-doped fiber laser with up to 585 MHz scalable repetition rate. Timing jitter properties in passive harmonic modelocking are studied with optical cross-correlation technique and radio-frequency (RF) measurements. Semiconductor saturable absorbers are developed and characterized for laser modelocking. Using these devices in a novel colliding-pulse harmonic modelocking configuration, significant timing jitter suppression is achieved in passive harmonic modelocking.; Photonic crystal fibers (PCFs) have been incorporated into the laser system for wavelength scaling. Taking advantage of the unique nonlinearity and dispersion properties of the PCFs, three different approaches are implemented to increase the tunability of the fiber-based femtosecond laser system. Wavelength scaling in the ranges of 930∼1200-nm, 1100∼1300-nm and 450∼630-nm are achieved with the schemes of fiber-based optical parametric oscillator (FOPO), Raman soliton self-frequency shift and Cherenkov radiation (CR) in PCFs respectively.; The wavelength scaling capability is implemented in frequency metrology applications. The pump power dependence of the carrier-envelope-offset (CEO) frequency in modelocked Yb-fiber laser is measured. Furthermore, a fiber-based all-optical scheme for carrier-envelope phase stabilization is demonstrated for the first time.; The average power of the Yb-fiber based laser system is scaled to 350 mW with a core-pumped single-mode Yb-fiber amplifier. A cladding-pumped Yb-fiber amplifier is employed to further scale the power up to 5.5 W. Applications of these sources in femtosecond micromachining are investigated. Surface and sub-surface channels are fabricated by femtosecond-laser-assisted photochemical etching in silicon.
机译：飞秒基于Yb纤维的锁模激光器和放大器系统得到了发展。在重复率，波长和平均功率方面，已经采用了各种方法来增加激光系统的可扩展性。无源谐波锁模技术首次在具有锁模Yb掺杂的光纤激光器中得到了证明，可重复频率高达585 MHz。利用光学互相关技术和射频（RF）测量研究了无源谐波对接中的定时抖动特性。开发了半导体可饱和吸收器，并对其特性进行了激光对接。在新颖的碰撞脉冲谐波模型对接配置中使用这些器件，可以在无源谐波模型对接中实现显着的时序抖动抑制。光子晶体光纤（PCF）已被并入激光系统中以进行波长缩放。利用PCF独特的非线性和色散特性，实现了三种不同的方法来增加基于光纤的飞秒激光系统的可调谐性。通过基于光纤的光参量振荡器（FOPO），拉曼孤子自频移和切伦科夫辐射（CR）的方案，可以实现930〜1200nm，1100〜1300nm和450〜630nm范围内的波长缩放）。波长缩放功能在频率计量应用中实现。测量了锁模Yb光纤激光器中载波包络偏移（CEO）频率的泵浦功率依赖性。此外，首次展示了用于载波-信封相位稳定的基于光纤的全光方案。使用芯泵浦的单模Yb光纤放大器，基于Yb光纤的激光系统的平均功率可缩放至350 mW。采用包层泵浦的Yb光纤放大器将功率进一步缩放至5.5W。研究了这些源在飞秒微加工中的应用。表面和子表面通道是通过飞秒激光辅助的硅光化学蚀刻制成的。

著录项

  • 作者

    Deng, Yujun.;

  • 作者单位

    University of Rochester.;

  • 授予单位 University of Rochester.;
  • 学科 Physics Optics.; Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2006
  • 页码 151 p.
  • 总页数 151
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 光学;无线电电子学、电信技术;
  • 关键词

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