Hydrostatic pressure applied to laser diodes allows tuning the emission wavelength to shorter wavelengths in a high tuning range. However, laser diodes are not optimized for pressure tuning, and a strong increase in threshold current with increasing pressure has been observed experimentally in red and near infrared devices.
On the other hand the change of emitting properties of laser diodes with hydrostatic pressure allows the extraction of internal material parameters. The goal of this project is to introduce the pressure dependence of material parameters into a complete diode laser model with two main applications:
- Characterization of the material properties and internal physics of laser diodes
- Modeling of pressure tuned tapered laser diodes.
This will help to understand the pressure dependence of recombination mechanisms in laser diodes and to make interpretation of experimental results, which have been previously obtained, as well as to optimize the design of pressure tunable high brightness lasers. These goals will be achieved by developing a pressure dependence module which will be introduced into an existing laser diode model, comparing the simulations with experimental results in different material systems and wavelengths, and designing new optimized tunable devices.
Previous experimental experience of the researcher on pressure dependent measurements will be combined with the expertise of the host group in laser diode modeling to produce a new characterization technique and to optimize tunable high brightness lasers.
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