Joona J. Koponen

Director of Fiber Design, nLIGHT

https://www.nlight.net

Joona J. Koponen is director of fiber design at nLIGHT (Camas, WA).

FIGURE 1. Chirally coupled core (3C) optical fiber mode propagation (a), a 33 μm core-diameter fiber image (b), simulated modal loss vs. wavelength for the two lowest fiber modes (c), and mode beat analysis for well-aligned and offset 33 μm fibers are shown. A spectral beating analysis that looks at the magnitude of fiber mode beating as a function of misalignment of a launched signal shows effectively no beat, indicating high-purity single-mode operation.

Fiber Optics

Fiber Lasers: 3C optical fibers improve large-mode-area MOPA designs

Rob Martinsen

March 11, 2014

Chirally coupled core (3C) optical fibers allow large-mode areas, near-diffraction-limited beam quality, and effectively zero modal pointing, owing to designed-in higher-order...