Ultrashort Pulses
نویسندگان
چکیده
Ultrashort pulses usually are defined as those lasting less than a nanosecond. Low-energetic ultrashort pulses can be used, for instance, as a probe for studying the dynamics of ultrafast processes. Amplifying these pulses can deliver extremely high peak power, allowing applications such as laser particle acceleration, or γ-ray generation via Compton scattering on relativistic electrons. Existing laser systems can provide pulses as brief as hundreds of attoseconds (10-18 s) and as powerful as tens of petawatts (1015 W); more advanced ones are being constructed or are planned (Corkum & Krausz, 2007, Korzhimanov et al., 2011).
منابع مشابه
Spectral Broadening of Ultrashort Optical Pulses in Nonlinear Photonic Crystal Fiber
A variety of nonlinear effects such as self – phase modulation (SPM) lead to spectral broadening of optical pulses. In the case of intense ultrashort pulses, when SPM is accompanied by other nonlinear processes such as stimulated Raman scattering and four-wave mixing, it leads to an extreme spectral broadening referred to as supercontinuum. In this paper, we demonstrate the effects of various n...
متن کاملUltrashort, Strongly Focused Laser Pulses in Free Space
Technological advances in ultrafast optics now allow the generation of laser pulses whose duration is as short as a few optical cycles of the electric field; furthermore, these pulses can be focused to a spot size comparable to the wavelength. These strongly focused, ultrashort laser pulses have found applications, for instance, in high-resolution microscopy, particle trapping and electron acce...
متن کاملNon-collinear spectral coherent combination of ultrashort laser pulses.
Non-collinear spectral coherent combining (NCSCC) of ultrashort pulses is analyzed. 2D modeling of the electromagnetic field is performed in case of NCSCC using two or three pulses with different wavelengths. In the case of two pulses, a potentially unwanted spatio-temporal structure of the field appears, corresponding to spatial and temporal modulation of the pulse. By using NCSCC of three 62 ...
متن کاملUltrashort laser pulse effects in ocular and related media.
Relatively little experimental and theoretical data exist on the retinal hazards of ultrashort laser pulses operating in the visible and near infrared spectral regions. Because of potential nonlinear effects that can occur from high-peak irradiance, ultrashort laser pulses propagate from the cornea to the retina, we have developed four projects within our Ultrashort Pulse Effects program. First...
متن کاملAmplification of ultrashort pulses in krypton fluoride at 248 nm.
Ultrashort pulses were produced at 248 nm by using a transverse-discharge KrF* excimer laser as a high-energy amplifier system. Input pulses for the amplifier system were obtained by upconverting the output of a modelocked visible dye laser to the ultraviolet by using nonlinear crystals. Pulses of up to 20 mJ; in energy with 10-30-psec duration were obtained at 10 pulses/sec. The output pulse w...
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تاریخ انتشار 2012