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Intracavity Absorption Spectroscopy with Short Pumping Pulses and Restricted Mode Competition
Author(s) -
Brunner W.,
Paul H.
Publication year - 1977
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19774890309
Subject(s) - pulse (music) , absorption (acoustics) , spectroscopy , sensitivity (control systems) , mode (computer interface) , physics , laser , optics , absorption spectroscopy , function (biology) , competition (biology) , rate equation , line (geometry) , steady state (chemistry) , atomic physics , materials science , quantum mechanics , chemistry , mathematics , geometry , ecology , electronic engineering , evolutionary biology , detector , computer science , kinetics , biology , engineering , operating system
In the numerical investigations of pulsed intracavity absorption spectroscopy performed hitherto, mechanisms ensuring mode coexistence have been disregarded. In the present paper the effect of a restriction of mode competition due to such mechanisms (e.g. an inhomogeneous contribution of the laser line width or the spatial hole burning of standing waves) on the detection sensitivity is studied by numerical analysis for short pumping pulses, starting from equations derived and solved, for steady‐state conditions, already in [7]. These equations contain a parameter v which is characteristic for the relative strength of the mechanisms responsible for mode coexistence. Our main result is that the detection sensitivity as a function of pulse duration for v ≠ 0 tends to an asymptotic value which decreases for increasing v and is approached at pulses whose length is the shorter the larger the value of v .