High-Power, Large-Mode 1.3-μm Lasers Based on Supermode Screening

A high-power, single-mode laser structure based on screening of supermodes in vertically coupled waveguides is proposed and demonstrated in the
$1.3 \mu \text{m}$
wavelength range. This supermode-screening (SuMoS) laser operates in a single large mode with low ellipticity that is ideal for optical coupling and high optical power at the facet. Fabricated Fabry-Pérot lasers demonstrated low loss (
$\sim $
1 cm
$^{-1}$
), high power (
$>$
500 mW), reasonable power conversion efficiency (
$>$
20%), and good coupling to a lensed optical fiber (
$>$
80%).