51. Pre-chirp managed self-phase modulation for efficient generation of wavelength-tunable energetic femtosecond pulses
- Author
-
Runzhi Chen and Guoqing Chang
- Subjects
Materials science ,business.industry ,Statistical and Nonlinear Physics ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Pulse (physics) ,010309 optics ,Nonlinear system ,Wavelength ,0103 physical sciences ,Femtosecond ,Chirp ,Optoelectronics ,business ,Self-phase modulation ,Energy (signal processing) ,Doppler broadening - Abstract
Self-phase-modulation-enabled spectral selection (SESS) allows generation of widely tunable femtosecond pulses. We propose pre-chirp managed SESS, in which the excitation pulse is properly pre-chirped to control the fiber-optic nonlinear spectral broadening and hence generate separated spectral lobes—a feature demanded by SESS. Besides offering improved efficiency compared with conventional energy-tuned SESS, this new method is able to reshape an input pulse of unwanted shape into a bell-shaped pulse that is desired for implementing SESS. The excellent energy scalability of pre-chirp managed SESS can produce megawatt-level femtosecond pulses widely tunable in the wavelength range of 0.86–1.3 µm. Such a powerful source is well suited to drive multiphoton microscopy to achieve deep-tissue imaging.
- Published
- 2020