Laser emission at 428 nm in N2+: Competition between two- and three-level amplification-Reference-Cited by-同舟云学术

Laser emission at 428 nm in N2+: Competition between two- and three-level amplification

Published:2023-03-13 Issue:11 Volume:122 Page:
ISSN:0003-6951
Container-title:Applied Physics Letters
language:en
Short-container-title:

Author:

Danylo R.¹^ORCID,Zhang X.¹²^ORCID,Lisova A.¹³,Houard A.¹^ORCID,Liu Y.²⁴^ORCID,Tikhonchuk V.⁵⁶^ORCID,Mysyrowicz A.¹^ORCID

Affiliation:

1. Laboratoire d'Optique Appliquée, ENSTA Paris, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris 1 , 828 Boulevard des Maréchaux, Palaiseau Cedex 91762, France

2. Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology 2 , 516 Jungong Road, Shanghai 200093, China

3. Faculty of Physics, Taras Shevchenko National University of Kyiv 3 , 64 Volodymyrska str., Kyiv 01601, Ukraine

4. CAS Center for Excellence in Ultra-Intense Laser Science 4 , Shanghai 201800, China

5. Centre Lasers Intenses et Applications, University of Bordeaux-CNRS-CEA 5 , 351 Cours de la Liberation, Talence Cedex 33405, France

6. Extreme Light Infrastructure ERIC, ELI-Beamlines Facility 6 , Dolní Břežany 25241, Czech Republic

Abstract

Lasing of N2+ at 428 nm is studied as a function of the delay dt between two 800 nm ultrashort pumping pulses from a Ti:sapphire laser. This lasing corresponds to a population-inverted transition between levels B2Σu+(0) and X2Σg+(1) of a singly ionized nitrogen molecule. An important erasing of laser emission is observed under pumping with two consecutive pulses separated by large delays −20 ps < dt < +20 ps. From an analysis of the quenching results, we conclude that the mechanism of lasing corresponds to a coherent two-photon amplification scheme. Our results show that a two-photon process can dominate over a population-inverted one-photon amplification.

Funder

Direction Générale de l'Armement

China Scholarship Council

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

Link

https://pubs.aip.org/aip/apl/article-pdf/doi/10.1063/5.0132475/16783881/111109_1_online.pdf

Reference30 articles.

1. Femtosecond filamentation in transparent media;Phys. Rep.,2007

2. Remote creation of coherent emissions in air with two-color ultrafast laser pulses;New J. Phys.,2013

3. Self-seeded lasing in ionized air pumped by 800 nm femtosecond laser pulses;Opt. Express,2013

4. Rotational coherence encoded in an ‘air-laser’ spectrum of nitrogen molecular ions in an intense laser field;Phys. Rev. X,2013

5. Sub-10-fs population inversion in N2+ in air lasing through multiple state coupling;Nat. Commun.,2015