6533b81ffe1ef96bd1277147
RESEARCH PRODUCT
Continuous-wave mirrorless lasing at 221 μm in sodium vapors
Dmitry BudkerAlexander M. AkulshinFelipe Pedreros Bustossubject
Quantum PhysicsMaterials scienceMagnetometerbusiness.industrySodiumchemistry.chemical_element01 natural sciencesAspect ratio (image)Atomic and Molecular Physics and OpticsPhysics - Atomic Physicslaw.inventionMagnetic field010309 opticsOpticschemistrylawExcited state0103 physical sciencesContinuous waveSpontaneous emissionAtomic physics010306 general physicsbusinessLasing thresholddescription
We demonstrate backward-directed continuous-wave (cw) emission at 2.21 {\mu}m generated on the 4P3/2-4S1/2 population-inverted transition in Na vapors two-photon excited with resonant laser light at 589 and 569 nm. Our study of power and atom-number-density threshold characteristics shows that lasing occurs at sub-10 mW total power of the applied laser light. The observed 6 mrad divergence is defined mainly by the aspect ratio of the gain region. We find that mirrorless lasing at 2.21 {\mu}m is magnetic field and polarization dependent that may be useful for remote magnetometry. The presented results could help determine the requirements for obtaining directional return from sodium atoms in the mesosphere
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-10-22 | Optics Letters |