Static and dynamic performance optimisation of a 1.3 μm GaInNAs ridge waveguide laser

Abstract

In this work, we perform a multi-parameter design study to improve the performance of an uncooled directly modulated 1.3 µm GaInNAs ridge waveguide laser for high speed operation especially at high temperature. The static and dynamic performance of the improved design is analyzed using an accurate in-house 2D electro-opto-thermal laser simulator. The improved structure is shown to have a lower threshold current, higher thermal roll-over limit and higher modulation bandwidth-especially under high temperature operation. The improved structure also has a lower vertical beam divergence compared to a reference structure with a conventional design.

Optimization of active region for promising uncooled continuous wave 1.55 μm high power diode laser

“…But, the growth technique and physics of this material system are still under extensive investigation. For InGaAlAs/InP, InGaAlAs/InP laser diodes have shown better performance than conventional InGaAsP/InP lasers at 1.3 µm wavelength [11]. This is mainly attributed to the larger conduction band offset which reduces the electron leakage.…”

Design and simulation of high-speed nanophotonic electro-optic modulators

“…A dynamic 2D bipolar electrical/thermal solver [8] is bidirectionally coupled to an optical model. A complete description of problem would require a 3D FDTD-based optical model.…”

Emulation of the operation and degradation of high-power laser bars using simulation tools

“…Amplified spontaneous emission is included in the optical model, along with non-radiative recombination processes, free carrier absorption and thermal-and carrierinduced lensing. Speclase has been widely employed for the experimentally validated design and optimization of different laser diodes, including ridge waveguide, broad-area, tapered and external cavity laser diodes [8][9][10].…”