Transverse mode dynamics in vertical cavity surface emitting lasers excited by fast electrical pulses
نویسندگان
چکیده
We report measurements of the transient multimode dynamics of vertical cavity surface emitting lasers excited by short ~100–200 ps rise times, 1 ns duration! electrical pulses. Fast changes on the spatial distribution of the output power and strong mode competition are observed. Numerical simulations show that the observed dynamics are due to the partial overlap of the different transverse modes through spatial hole burning. © 1996 American Institute of Physics. @S0003-6951~96!04505-0#
منابع مشابه
Spatio-temporal dynamics in vertical cavity surface emitting lasers excited by fast electrical pulses
We have measured the time average spatial intensity distribution and the spatio-temporal evolution of the spectrally Ž . resolved radiation emitted from broad-area vertical cavity surface emitting lasers VCSEL when pumped by a fast current pulse. We show that an intrinsic symmetry break exists due to geometrical asymmetry of the device structure and that the frequency separation between differe...
متن کاملSpectral dynamics of picosecond gain-switched pulses from nitride-based vertical-cavity surface-emitting lasers
Short pulses generated from low-cost semiconductor lasers by a simple gain-switching technique have attracted enormous attention because of their potential usage in wide applications. Therein, reducing the durations of gain-switched pulses is a key technical point for promoting their applications. Therefore, understanding the dynamic characteristics of gain-switched pulses is highly desirable. ...
متن کاملNonlinear dynamics of current-modulated multitransverse mode vertical-cavity surface-emitting lasers
An analysis of the nonlinear dynamics of current modulated weakly index-guided VCSELs in a multi{transverse mode regime is performed by using a model that takes into account all the transverse modes supported by the waveguide. Nonlinear dynamical behavior is studied when applying current modulation of high frequency and large modulation depth. Chaotic behavior is obtained in the multitransverse...
متن کاملSynchronization of unidirectionally coupled multi-transverse-mode vertical-cavity surface-emitting lasers
The synchronization of unidirectionally coupled multi-transverse-mode vertical-cavity surface-emitting lasers (VCSELs) is numerically studied. It is demonstrated that synchronization can be achieved between each transverse mode of a master laser and its counterpart, a slave laser. This result opens the opportunity for multichannel chaotic communications by use of multi-transverse-mode VCSELs. I...
متن کاملSurface-structure-assisted chaotic mode lasing in vertical cavity surface emitting lasers.
We demonstrate chaotic mode lasing in vertical cavity surface emitting lasers at room temperature, with an open cavity confined laterally by the native oxide layer. Instead of introducing any defect mode, we show that suppression of lower-order cavity modes can be achieved by destroying vertical reflectors with a surface microstructure. Lasing on chaotic modes is observed directly through colle...
متن کامل