Stimulated Raman amplification of femtosecond pulses in hydrogen gas.
نویسندگان
چکیده
We report efficient amplification of weak femtosecond supercontinuum pulses by a stimulated Raman scattering process in pressurized H(2) gas excited with 350-fs-duration frequency-doubled pulses from a regenerativeamplified Ti:sapphire laser. An amplification factor of 10(9) is obtained at the wavelength of 465 nm for seed pulses produced by supercontinuum generation in glass.
منابع مشابه
Femtosecond multiple - pulse impulsive stimulated Raman scattering spectroscopy
Optical control of elementary molecular motion through impulsive stimulated Raman scattering is enhanced by means of timed sequences of femtosecond pulses that are produced by pulse-shaping techniques. In particular, terahertz-rate trains of femtosecond pulses are used for repetitive impulsive excitation of individual phonon modes in an a-perylene molecular crystal. When the pulse repetition ra...
متن کاملUnified description of ultrafast stimulated Raman scattering in optical fibers
Coupled nonlinear equations that describe the nonlinear process of stimulated Raman scattering in optical fibers are derived. These equations account in a unified manner for the Raman amplification, the Stokes generation, the induced self-frequency shift, and the interpulse stimulated Raman-scattering-induced crossfrequency shift. The equations reduce to a well-known form for relatively wide pi...
متن کاملOptical Amplification and Reshaping Based on Rogue Wave in the Femtosecond Regime
Based on the higher order nonlinear Schrödinger equation, the amplification and the reshaping of ultrashort pulses are investigated. The numerical results show that the direct amplification of femtosecond pulses can be achieved by injecting a continuous wave (CW) and filtering the CW at suitable positions in the presence of higher-order dispersion and nonlinear effects. The combination of conti...
متن کاملSpectrally tailored narrowband pulses for femtosecond stimulated Raman spectroscopy in the range 330-750 nm.
Spectral compression of femtosecond pulses by second harmonic generation in the presence of substantial group velocity dispersion provides a convenient source of narrowband Raman pump pulses for femtosecond stimulated Raman spectroscopy (FSRS). We discuss here a simple and efficient modification that dramatically increases the versatility of the second harmonic spectral compression technique. A...
متن کاملCompression of X-ray Free Electron Laser Pulses to Attosecond Duration
State of the art X-ray Free Electron Laser facilities currently provide the brightest X-ray pulses available, typically with mJ energy and several hundred femtosecond duration. Here we present one- and two-dimensional Particle-in-Cell simulations, utilising the process of stimulated Raman amplification, showing that these pulses are compressed to a temporally coherent, sub-femtosecond pulse at ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Optics letters
دوره 21 24 شماره
صفحات -
تاریخ انتشار 1996