Propagating of partially coherent laser beam in the near-resonant atomic gas

• Published in: Optics communications Vol. 399; pp. 73 - 76
• Main Authors: Kong, Delong, Wang, Zhaoying, Fang, Feiyun, Shi, Congquan, Lin, Qiang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.09.2017
• Subjects: Absorbing; Coherence degree; Optical spectrum; Partially coherent laser; Coherence degree; Partially coherent laser; Absorbing; Optical spectrum
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2017.04.061

The characteristics of the light with various degrees of spatial coherence traveling in near-resonant atomic gas are investigated both experimentally and theoretically. The experimental results show that the coherence of partially coherent beams can get better after interaction with atoms under some certain conditions compared with that before interaction. The experimental results are explained theoretically by the method of spectroscopy absorption. Furthermore, partially coherent light has a better environmental adaptability than fully coherent light. •We use a lithium niobate crystal to produce partially coherent light.•Coherence of partially coherent beams can get better after interaction with atoms.•Absorption changes optical spectrum and reforms the degree of coherence.•Verify that partially coherent light has a better environmental adaptability.