High‐dimensional frequency converter provides an enticing promise for establishing
frequency interfaces to connect various physical systems toward the next generation of high …

The orbital angular momentum (OAM) of light is a quantity explored for communication and
quantum technology, its key strength being a wide set of values offering a large basis for …

Directional infrared emission at 1.37 and 5.23 μm is generated in Rb vapors that are
stepwise excited by low-power cw resonant light. The radiation at 5.23 μm originating from …

We suggest a technique based on the transfer of topological charge from applied laser
radiation to directional and coherent optical fields generated in ladder-type excited atomic …

We report on experimentally observed addition, subtraction, and cancellation of orbital
angular momentum (OAM) in the process of parametric four-wave mixing that results in …

The parametric four-wave mixing (4WM) process responsible for the generation of coherent
blue light in alkali vapors is a self-seeded process which starts by population inversion and …

We report the first use of a ring cavity to both enhance the output power and dramatically
narrow the linewidth (< 1 MHz) of blue light generated by four-wave mixing in a rubidium …

We demonstrate how the orientation of the Rb cell can significantly affect the intensity and
spectral characteristics of both the frequency up-and downconverted fields generated by …

Optical vortices are widely explored in quantum optics and communication because of their
quantized orbital angular momentum, especially its applications in the frequency conversion …

Blue-violet wavelength multiplexing offers the capability to enhance the operational capacity
and efficiency in optical information processing, underwater communications, biology, and …