Carrier-carrier scattering in the gain dynamics of InxGa1-xAs/AlyGa1-yAs diode lasers.

AlxGa1-xAs/AlyGa1-yAs VISIBLE LASERS GROWN BY MOCVD

AlGaAs/AlGaAs double-heterostructure (DH) visible lasers with low threshold current densities have been grown by metalorganic chemical vapor deposition (MOCVD). Proton-isolated narrow stripe visible lasers have good performance and uniformity of the characteristics over the whole wafer is excellent. Contamination of the undoped AlGaAs depends on the partial pressure ratio of V element to 111 el...

A study of disorder effects in random „AlxGa1−xAs...n„AlyGa1−yAs...m superlattices embedded in a wide parabolic potential

Gain dynamics and ultrafast spectral hole burning in In„Ga...As self-organized quantum dots

Using a femtosecond three-pulse pump-probe technique, we investigated spectral hole-burning and gain recovery dynamics in self-organized In~Ga!As quantum dots. The spectral hole dynamics are qualitatively different from those observed in quantum wells, and allow us to distinguish unambiguously the gain recovery due to intradot relaxation and that due to carrier capture. The gain recovery due to...

Improving the Thermal Characteristics of Semiconductor Lasers Using a New Asymmetric Waveguide Structure

   Self-heating leads to a temperature rise of the laser diode and limits the output power and efficiency due to increased loss and decreased differential gain. To control device self-heating, it is required to design the laser structure with a low optical loss, while the heat flux must spread out of the device efficiently. In this study, a new asymmetric waveguide design is proposed and th...

A Novel Design of Quarter Wave-shifted Distributed Feedback Semiconductor Laser for High-power Single-mode Operation

The spatial hole burning effect has been known to limit the performance of distributed feedback semiconductor diode lasers. As the biasing current of a single quarterly-wavelength-shifted distributed feedback diode laser increase, the gain margin reduces. Therefore, the maximum single-mode output power of the quarterly-wavelength-shifted distributed feedback diode laser is restricted to a relat...