DocumentCode :
1421378
Title :
A new theory for the treatment of a pulsed beam propagating through a grating pair
Author :
Wang, Zhongyang ; Xu, Zhizhan ; Zhang, Zheng-quan
Author_Institution :
Inst. of Opt. & Fine Mech., Acad. Sinica, Shanghai, China
Volume :
37
Issue :
1
fYear :
2001
fDate :
1/1/2001 12:00:00 AM
Firstpage :
1
Lastpage :
11
Abstract :
A new theoretical model, without the first-order approximation of grating diffraction, has been developed for studying the propagation of a pulsed beam through a grating pair. By using our model, the astigmatic aberration of the grating pair has been analyzed in detail. It was shown that the grating pair may be a good optical element for astigmatic compensation of monochromatic optical beams. But for grating pulse compression, the astigmatic aberration affects the pulse fronts and the effects of finite beam size (FBS). These effects on the compression of ultra-broadband pulses have been studied. It was found that, due to these effects, the space-time shapes of the compressed pulse are severely distorted. The magnitude of this distortion depends not only on the astigmatic aberration, but also on the spectral bandwidth and spatial divergence of the pulse. When the input pulsed beam is collimated, the waveform distortion due to the effects of FBS can be eliminated, but the pulse front distortion remains. In addition, the spatial and temporal properties of the compressed pulse for a single-pass compressor have been studied. An analytical expression without the well-collimated condition was obtained to describe the effect of lateral frequency shift. Also, the effect of third-order dispersion on a single-pass compressor is discussed
Keywords :
aberrations; diffraction gratings; light diffraction; light propagation; optical dispersion; optical pulse compression; analytical expression; astigmatic aberration; astigmatic compensation; collimated beam; compressed pulse; compression; finite beam size; first-order approximation; grating diffraction; grating pair; input pulsed beam; lateral frequency shift; monochromatic optical beams; optical element; propagation; pulse compression; pulse front distortion; pulse fronts; pulsed beam; pulsed beam propagation; severely distorted pulses; single-pass compressor; space-time shapes; spatial properties; temporal properties; third-order dispersion; ultra-broadband pulses; waveform distortion; well-collimated condition; Diffraction gratings; Optical beams; Optical diffraction; Optical distortion; Optical propagation; Optical pulse compression; Optical pulse shaping; Optical pulses; Pulse compression methods; Shape;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/3.892718
Filename :
892718
Link To Document :
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