Creating discrete cylindrical vector beams using coherently combined fiber arrays

R. Steven Kurti; Klaus Halterman; Ramesh K. Shori; Cyrus Arian; Michael J. Wardlaw

doi:10.1117/12.841588

17 February 2010 Creating discrete cylindrical vector beams using coherently combined fiber arrays

R. Steven Kurti, Klaus Halterman, Ramesh K. Shori, Cyrus Arian, Michael J. Wardlaw

Proceedings Volume 7580, Fiber Lasers VII: Technology, Systems, and Applications; 75801P (2010) https://doi.org/10.1117/12.841588
Event: SPIE LASE, 2010, San Francisco, California, United States

Abstract

A novel method is presented for beam shaping far field intensity distributions using coherently combined fiber arrays. Traditionally, coherent arrays have been composed of linearly polarized elements having their polarization vector along a common axis. In this novel method, the fibers are arranged uniformly on the perimeter of a circle, and the linearly polarized beams are oriented with their polarization vectors arranged in a cylindrical fashion such that each subsequent vector is rotated by 2π/N where N is the number of elements on the circle. The elements each have the same Gaussian intensity distribution and power. The ensemble yields a far field intensity pattern that is a good approximation to a cylindrical vector (CV) beam which is characterized by a nonuniform polarization distribution and a null in the center of the beam. These synthetically created CV beams, or discrete cylindrical vector (DCV) beams, can be represented in a closed form solution to predict the far field intensity distributions. This solution is shown to agree with experimental results where several values of N, the number of elements, were tested. In addition, some more complex geometries such as nested geometries, fractal geometries, and some nonuniform geometries have been simulated, all of which also have a central null in the beam and have a nonuniform polarization distribution. These results are in contrast to linearly polarized beams, where the intensity peaks on axis, and from traditional cylindrical vector beams, which are generated by a single laser cavity.

Citation Download Citation

R. Steven Kurti, Klaus Halterman, Ramesh K. Shori, Cyrus Arian, and Michael J. Wardlaw "Creating discrete cylindrical vector beams using coherently combined fiber arrays", Proc. SPIE 7580, Fiber Lasers VII: Technology, Systems, and Applications, 75801P (17 February 2010); https://doi.org/10.1117/12.841588

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Polarization

Chemical elements

Gaussian beams

Beam shaping

Fiber lasers

Laser resonators

Axicons

Show All Keywords

Keywords/Phrases

Search In:

Publication Years