Quantum dash based directly modulated lasers for long‐reach access networks

Quantum dash based directly modulated lasers for long-reach access networks

Phase-amplitude coupling characteristics in directly modulated quantum dot lasers

Theory of Main Resonances in Directly Modulated Diode Lasers

Domains of existence of the main resonances in directly modulated semiconductor lasers are obtained by application of quasi-conservative theory. The predictions are compared with numerical results coming from a direct integration of the model equations and with experimental observations reported by other groups. In both cases we find a qualitative good agreement. We consider a model that contai...

Widely tunable directly modulated sampled-grating DBR lasers

We report on the experimental results obtained for direct intensity modulation of widely tunable sampled-grating distributed Bragg-reflector (SGDBR) lasers. These devices operate in the C-band (1525 – 1562 nm range) and are directly modulated with analog and digital signals. The results obtained show a 6-GHz small-signal bandwidth, and an undistorted EyePattern for a NRZ signal modulation with ...

Design Optimization for 4.1-THZ Quantum Cascade Lasers

We present an optimized design for GaAs/AlGaAs quantum cascade lasers operating at ‎‎4.1THz. This was based on a three-well active module with diagonal radiative transition. This ‎was performed by modifying the existing model structure, to reduce the parasitic anticrossings ‎‎(leakage currents) as well as the optical gain linewidth. While the gain FWHM was reduced by ‎more than 50% the gain pea...