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- Title
Optical Vortex Brillouin Laser.
- Authors
Xinglin Zeng; Russell, Philip St. J.; Yang Chen; Zheqi Wang; Wong, Gordon K. L.; Roth, Paul; Frosz, Michael H.; Stiller, Birgit
- Abstract
Optical vortices, which have been extensively studied over the last decades, offer an additional degree of freedom useful in many applications, such as optical tweezers and quantum control. Stimulated Brillouin scattering (SBS), providing a narrow linewidth and a strong nonlinear response, has been used to realize quasi-continuous wave lasers. Here, stable oscillation of optical vortices and acoustic modes in a Brillouin laser based on chiral photonic crystal fiber (PCF) is reported, which robustly supports helical Bloch modes (HBMs) that carry circularly polarized optical vortex and display circular birefringence. A narrow-linewidth Brillouin fiber laser that stably emits 1stand 2nd-order vortex-carrying HBMs is implemented. Angular momentum conservation selection rules dictate that pump and backward Brillouin signals have opposite topological charge and spin. Additionally, it is shown that when the chiral PCF is placed within a laser ring cavity, the linewidth-narrowing associated with lasing permits the peak of the Brillouin gain that corresponds to acoustic mode to be measured with resolution of 10 kHz and accuracy of 520 kHz. The results pave the way to a new generation of vortex-carrying SBS systems with applications in optical tweezers, quantum information processing, and vortex-carrying nonreciprocal systems.
- Subjects
OPTICAL vortices; PHOTONIC crystal fibers; RING lasers; BRILLOUIN scattering; OPTICAL tweezers; FIBER lasers; QUANTUM information science; ACTIVE medium
- Publication
Laser & Photonics Reviews, 2023, Vol 17, Issue 4, p1
- ISSN
1863-8880
- Publication type
Article
- DOI
10.1002/lpor.202200277