Abstract
Solid-state monolithic nonplanar ring oscillator (NPRO) is a well-known platform to generate narrow-linewidth laser sources. Light in an NPRO at the lasing wavelength is usually confined by a few total internal reflections within one round-trip. High reflection coating on one of the surfaces is often used to enable direct free-space coupling. In this communication, we present recent results on the direct generation of kHz-level linewidth Laguerre-Gaussian beams carrying orbital angular momentum (OAM) in an Nd:YAG NPRO platform. Vortex beams featuring crystal-like OAM are also generated and investigated. These results can find potential applications in optical tweezers and high-capacity optical communications.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
