Abstract

We present a new concept of an integrated optics component capable of measuring the complex amplitudes of the modes at the tip of a multimode waveguide. The device uses a photonic lantern to split the optical power carried by an $N$-modes waveguide among a collection of single-mode waveguides that excite a periodic array of at least $N^2$single-mode evanescently-coupled waveguides. The power detected at each output of the array is a linear combination of the products of the modal amplitudes—a relation that can, under suitable conditions, be inverted allowing the derivation of the amplitudes and relative phases of the modal mixture at the input. The expected performance of the device is discussed and its application to the real-time measurement of modal instability in high power fiber lasers is proposed.

© 2019 Optical Society of America

Photonic lantern tip/tilt detector for adaptive optics systems

Daniel Cruz-Delgado, Juan Carlos Alvarado-Zacarias, Matthew A. Cooper, Steffen Wittek, Caleb Dobias, Julian Martinez-Mercado, Jose E. Antonio-Lopez, Nicolas K. Fontaine, and Rodrigo Amezcua-Correa
Opt. Lett. 46(13) 3292-3295 (2021)

Mode discrimination in dissipatively coupled laser arrays

Jiajie Ding and Mohammad-Ali Miri
Opt. Lett. 44(20) 5021-5024 (2019)

Mode-selective amplification in a large mode area Yb-doped fiber using a photonic lantern

S. Wittek, R. Bustos Ramirez, J. Alvarado Zacarias, Z. Sanjabi Eznaveh, J. Bradford, G. Lopez Galmiche, D. Zhang, W. Zhu, J. Antonio-Lopez, L. Shah, and R. Amezcua Correa
Opt. Lett. 41(10) 2157-2160 (2016)

Beam shaping of a broad-area laser diode using 3D integrated optics

Simon Gross, David W. Coutts, Mark Dubinskiy, and Michael J. Withford
Opt. Lett. 44(4) 831-834 (2019)

Femtosecond laser written arrayed waveguide gratings with integrated photonic lanterns

G. Douglass, F. Dreisow, S. Gross, and M. J. Withford
Opt. Express 26(2) 1497-1505 (2018)