caa a22 4500 445867620 CHVBK 20180317145502.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1140/epjd/e2010-10220-2 doi (NATIONALLICENCE)springer-10.1140/epjd/e2010-10220-2 Modulation transfer in Doppler broadened Λ system and its application to frequency offset locking [Elektronische Daten] [Y. B. Kale, A. Ray, N. Singh, Q. V. Lawande, B. N. Jagatap] Abstract.: We investigate modulation transfer through pump induced atomic coherence in pump-probe spectroscopy of Doppler broadened medium of cesium atoms. The mechanism of modulation transfer is discussed for a three level Λ configuration under slow frequency modulation. Modulation transfer is demonstrated by performing frequency modulation spectroscopy (FMS) on a sub-natural linewidth (<2MHz) electromagnetically induced transparency (EIT) signal. Here the pump laser is modulated by acousto-optic frequency modulation and the modulation is transferred to the probe laser through atomic coherence. Finally the probe laser is locked on the first derivative spectrum of EIT signal. Such atomic frequency offset locking system totally removes the necessity of direct modulation of laser frequency, so that the spectral resolution is limited only by the practical linewidth of the laser systems. Moreover it provides a novel way to eliminate the additional frequency and intensity noise associated with direct frequency dithering, which may limit the experimental resolution. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2010 Kale Y. B. Laser & Plasma Technology Division, Bhabha Atomic Research Centre, 400 085, Mumbai, India aut Ray A. Laser & Plasma Technology Division, Bhabha Atomic Research Centre, 400 085, Mumbai, India aut Singh N. Homi Bhabha National Institute, Bhabha Atomic Research Centre, 400 085, Mumbai, India aut Lawande Q. V. Theoretical Physics Division, Bhabha Atomic Research Centre, 400 085, Mumbai, India aut Jagatap B. N. Homi Bhabha National Institute, Bhabha Atomic Research Centre, 400 085, Mumbai, India aut The European Physical Journal D Springer-Verlag 61/1(2011-01-01), 221-229 1434-6060 61:1<221 2011 61 10053 https://doi.org/10.1140/epjd/e2010-10220-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2010-10220-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kale Y. B. Laser & Plasma Technology Division, Bhabha Atomic Research Centre, 400 085, Mumbai, India aut NATIONALLICENCE 700 1- Ray A. Laser & Plasma Technology Division, Bhabha Atomic Research Centre, 400 085, Mumbai, India aut NATIONALLICENCE 700 1- Singh N. Homi Bhabha National Institute, Bhabha Atomic Research Centre, 400 085, Mumbai, India aut NATIONALLICENCE 700 1- Lawande Q. V. Theoretical Physics Division, Bhabha Atomic Research Centre, 400 085, Mumbai, India aut NATIONALLICENCE 700 1- Jagatap B. N. Homi Bhabha National Institute, Bhabha Atomic Research Centre, 400 085, Mumbai, India aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 61/1(2011-01-01), 221-229 1434-6060 61:1<221 2011 61 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer