Abstract
A new approach for analytically solving quantum nonlinear Langevin equations is proposed and applied to calculations of spectra of superradiant lasers where collective effects play an important role. We calculate lasing spectra for arbitrary pump rates and recover well-known results such as the pump dependence of the laser linewidth across the threshold region. We predict new sideband peaks in the spectrum of superradiant lasers with large relaxation oscillations as well as new nonlinear structures in the lasing spectra for weak pump rates. Our approach sheds new light on the importance of population fluctuations in the narrowing of the laser linewidth, in the structure of the lasing spectrum, and in the transition to coherent operation.
| Original language | English |
|---|---|
| Article number | 063010 |
| Journal | New Journal of Physics |
| Volume | 23 |
| Issue number | 6 |
| Number of pages | 27 |
| ISSN | 1367-2630 |
| DOIs | |
| Publication status | Published - Jun 2021 |
Bibliographical note
Funding Information:Original content from this work may be used under the terms of the . Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Danish National Research Foundation through NanoPhoton—Center for Nanophotonics DNRF147 Villum Fonden (VKR Center of Excellence NATEC-II) 8692 Otto Moensted Visiting Professorship Grant 19-12-1159 Independent Research Fund Denmark—Natural Sciences 135-00403B yes � 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft Creative Commons Attribution 4.0 licence
Publisher Copyright:
© 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
Keywords
- Laser spectra
- Nanolasers
- Superradiance