This chapter provides a detailed review of the design of a three-lens resonator that can generate donut-like vortex beams directly from end-pumped solid-state lasers. The proposed resonator consists of only three simple and easily made lens elements, and is actually a conceptual combination of a laser mode selector and an astigmatic mode converter (AMC). Using the resonator, selective donut-like vortex beams generation can be achieved by "gain region control" mechanism, i.e., simply controlling the transverse pumping beam shape and transverse position on the laser crystal inserted into the resonator. Generating a donut-like vortex laser beam with a tunable ring diameter and orbital angular momentum can be achieved directly from the resonator with off-axis LD pumping. In addition to donut-like vortex beams, the proposed three-lens resonator can also produce a kind of rectangular vortex laser beams with a specified vortex number. The special phase singularity within the optical vortex cross-sectional profile embedded in vortex laser beams can be applied to optical tweezers and are widely used in research studying regarding the trapping and guiding of cold atoms, transfer of angular momentum between light and matter, rotational frequency shift, entanglement states of photons, and other topics.
|Title of host publication||Progress in Optical Fibers Research|
|Publisher||Nova Science Publishers, Inc.|
|Number of pages||21|
|Publication status||Published - 2010 Dec 1|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)