Abstract
For most photonics devices and systems, loss is desperately averted, since it will increase the power consumption and degrade the performance. However, in some non-Hermitian systems, loss can induce a modal gain when the parity-time symmetry is broken, which offers a new way to manipulate the lasing of active cavities. Here we experimentally observe the counterintuitive phenomenon in a single laser cavity assisted by the polarization-dependent loss. A parity–time symmetric system is constituted by the two orthogonally polarized photonic loops in a single laser cavity, which can guarantee the consistency of two coupling loops. The measured output power of the cavity depends on the cross-polarization loss, which reveals virtually opposite relationships before and after the critical point. It provides a novel, to the best of our knowledge, understanding of polarization loss and shows great potential for lasing manipulation in a single cavity with polarization control.
Original language | English |
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Pages (from-to) | 3151-3154 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 46 |
Issue number | 13 |
Early online date | 24 Jun 2021 |
DOIs | |
Publication status | Published - Jul 2021 |
Scopus Subject Areas
- Atomic and Molecular Physics, and Optics