Polarization and transverse-mode selection in quantum-well vertical-cavity surface-emitting lasers: index- and gain-guided devices
نویسندگان
چکیده
منابع مشابه
Polarization and transverse mode selection in birefringent Vertical-Cavity Surface Emitting Lasers
Calculations are reported of the eeect of birefringence on the selection of polarization states for the case of a weakly index guided Vertical-Cavity Surface Emitting Laser supporting both a fundamental and a higher-order transverse mode. The innuence of the refraction index step of the waveguide on the polarization behaviour of the laser is elucidated. It is found that for large refraction ind...
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We show experimentally that polarization mode hopping in quantum dot vertical cavity surface emitting lasers (VCSELs) takes place between nonorthogonal elliptically polarized modes. In contrast to quantum well VCSELs the average dwell time decreases with injection current. This decrease is by 8 orders of magnitude: from seconds to nanoseconds and is achieved without any modifications of the VCS...
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We study the transversemode selection of aweakly index-guided vertical-cavity surface-emitting laser (VCSEL), based on an extension of the model of Valle et al. [Opt. Commun. 115 (1995) 297]. In the model we incorporate carrier capture and escape processes between the separate confinement heterostructure (SCH) layer and the quantum well (QW) active region of a VCSEL. These effects are character...
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Relative intensity noise spectra of weakly index guided VCSELs in a multi{transverse mode regime are analyzed by using a model that takes into account all the transverse modes supported by the waveguide. Several resonance peaks are obtained in the noise spectra that correspond to the relaxation oscillation frequencies of the transverse modes. In is shown that for low spatially overlapping trans...
متن کاملPolarization switching control in vertical-cavity surface-emitting lasers
Orthogonal polarizations within vertical-cavity surface-emitting lasers ~VCSEL! lase at slightly different wavelengths. We describe the use of optical feedback to confine polarization variations to reproducible injection currents. An external cavity is used to select specific wavelengths that reflect back into the VCSEL, hence, changing the cavity Q for the different polarization states. With t...
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ژورنال
عنوان ژورنال: Quantum and Semiclassical Optics: Journal of the European Optical Society Part B
سال: 1997
ISSN: 1355-5111,1361-6625
DOI: 10.1088/1355-5111/9/5/006