A temperature-stable semiconductor laser based on coupled waveguides

Harmonic mode-locking in quantum dot lasers with tunnel-coupled waveguides

“…This feature creates new opportunities for designing optical systems with multi fiber coupling. Another advantage of this waveguide is increased tem perature stability of the lasing wavelength [5].…”

“…Different designs of broadened waveguides includ ing tunnel coupled ones [5] are considered to be one of the methods reducing light beam divergence, which is critical for optical fiber coupling. Furthermore, in broadened waveguides optical modes have smaller optical confinement factor, which causes stronger gain 2 saturation and reduces spontaneous noise fraction in the lasing mode.…”