title: Complex mode amplitude measurement for a six-mode optical fiber.
abstract: We propose a measurement protocol and parameter estimation algorithm to recover the powers and relative phases of each of the vector modes present at the output of an optical fiber that supports the HE₁₁, TE₀₁, HE₂₁, and TM₀₁ modes. The measurements consist of polarization filtered near-field intensity images that are easily implemented with standard off-shelf components. We demonstrate the accuracy of the method on both simulated and measured data from a recently demonstrated fiber that supports stable orbital angular momentum states.
authors.affiliation: MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02420, USA. golowich@ll.mit.edu
authors.forename: Steven
authors.initials: S
authors.lastname: Golowich
authors.forename: Nenad
authors.initials: N
authors.lastname: Bozinovic
authors.forename: Poul
authors.initials: P
authors.lastname: Kristensen
authors.forename: Siddharth
authors.initials: S
authors.lastname: Ramachandran
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000295:instrumentation* / Q000379:methods; D008029:Lighting / Q000295:instrumentation*; D055100:Optical Fibers; D012031:Refractometry / Q000295:instrumentation*