Open AccessCoherent control of two-photon absorption of Pr3+ ion by shaped ultrashort laser pulses
Author(s) -
Wenjing Cheng,
Shian Zhang,
Tianqing Jia Tianqing Jia,
Jing Ma Jing,
Donghai Feng Donghai Feng,
Zhenrong Sun Zhenrong Sun
Publication year - 2013
Publication title -
chinese optics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.617
H-Index - 37
ISSN - 1671-7694
DOI - 10.3788/col201311.041903
Subject(s) - optics , absorption (acoustics) , laser , coherent control , materials science , two photon absorption , photon , ion , physics , optoelectronics , quantum mechanics
Enhancing the photoluminescence and depressing the background emission are important problems in rare earth ion-doped materials. In this letter, the two-photon absorption (TPA) probability in a Pr3+ ion system is enhanced by a factor of 12.3 by a π-phase step scanning of ultrashort laser pulses. This level is significantly higher than that achieved by a transform-limit pulse. However, the laser intensity of shaped pulse is reduced to 37% of the initial transform-limited pulse. In this method, the TPA probability can also be reduced to 58%. Furthermore, the effect of the shift of the intermediate energy level and the bandwidth of final states on TPA probability is discussed.
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