DocumentCode :
1136359
Title :
Spectrum and width of mode-locked laser pulses
Author :
Gunn, J.B.
Author_Institution :
IBM Corp., Yorktown Heights, NY, USA
Volume :
5
Issue :
10
fYear :
1969
fDate :
10/1/1969 12:00:00 AM
Firstpage :
513
Lastpage :
516
Abstract :
An analytical theory is given of the spectrum of the pulses generated by a ring laser that is mode locked by a synchronously modulated absorber. A steady-state solution is defined by requiring that, in a round trip, the joint effect of the active medium and the modulated absorber leave the pulses unchanged. The resulting integral equation is solved approximately, and the frequency spectrum of the pulses is obtained in closed form. Although the spectrum cannot be transformed analytically to obtain the pulse shape, the second moment of the shape, which gives a measure of the width, is found. The spectrum and width are found to depend on the curvature of the modulator waveform, near its maximum transmission, and on the gain and bandwidth of the active medium, which is assumed to have a Lorentzian line shape.
Keywords :
Laser mode locking; Laser theory; Optical pulse generation; Optical pulses; Pulse measurements; Pulse modulation; Ring lasers; Shape measurement; Space vector pulse width modulation; Synchronous generators;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/JQE.1969.1075686
Filename :
1075686
Link To Document :
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