quantum well vertical cavity surface emitting lasers
Spontaneous formation of vector vortex beams in vertical-cavity surface-emitting lasers with feedback
... Beams with a spatially non-uniform polarization distri- bution attracted a rapidly growing interest over the last years due to a combination of intrinsic appeal and beauty, novel fundamental aspects in quantum ...
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Controlled propagation of spiking dynamics in vertical-cavity surface-emitting lasers : towards neuromorphic photonic networks
... semiconductor lasers (SLs) have clearly dominated [12,16] given the potentials of these devices for application in information processing [15-22], optical interconnects [23] and communication networks ...and ...
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Structural Analysis of InGaAs Based Vertical Cavity Surface-Emitting Quantum Well Laser
... long-wavelength vertical- cavity surface-emitting lasers (LW-VCSELs) in order to realize reduced optical loss, as well as increasing current and optical ...
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Characterization of Vertical Cavity Surface Emitting Lasers With Electrical and Optical Derivative Spectroscopy
... The Proton VCSEL structure consists of two DBR mirrors (one on top and one on bottom, a region of proton damage, active region. The proton bombarded layer provides good current confinement but little or no optical ...
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Polarization fluctuations in vertical-cavity semiconductor lasers
... all lasers, but are exceptionally strong in semiconductor vertical-cavity surface-emitting lasers ~ VCSELs ! ...large quantum-limited laser linewidth @ 1 # ...
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Dynamics importance sampling for the collection of switching events in vertical cavity surface emitting lasers
... [14] S. Beri, R. Mannella, and P. V. E. McClintock, Dynamics importance sampling for the activation problem in nonequilibrium continuous systems and maps in Noise in Complex Systems and Stochastic Dynamics II, edited by ...
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Electrically-controlled neuron-like spiking regimes in vertical-cavity surface-emitting lasers at ultrafast rates
... fibre lasers [10,11], semiconductor optical amplifiers (SOAs) [12,13], optical modulators [14,15] and semiconductor lasers (SLs) ...micro-disk lasers [16], micro-pillar lasers [17-19] and ...
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Dynamic modelling of electrooptically modulated vertical compound cavity surface emitting semiconductor lasers
... shallow surface etching of the top mirror reflectivity can also improve the direct modu- lation (Westbergh et al 2010, ...the cavity as an alternative to current modulation; see ...semiconductor ...
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Femtosecond synchronously in-well pumped vertical-external-cavity surface-emitting laser
... Vertical-external-cavity surface-emitting lasers (VECSELs) have been demonstrated to produce high continuous wave (CW) average output powers with excellent beam quality ...multiple ...
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Femtosecond synchronously mode-locked vertical-external cavity surface-emitting laser
... a well known phenomenon in dye and color center lasers [11, ...increasing cavity length (shown in ...center lasers, where the separation between pulses increases for increasing cavity ...
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Vertical external cavity semiconductor lasers
... and the dispersion of the cavity. These authors found that stable near-transform-limited pulses can circulate in such a laser, provided that the negative phase shifts arising from saturation are compensated by the ...
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Bistability conditions between lasing and non-lasing states for vertical-cavity surface-emitting lasers with frequency-selective optical feedback
... For the strongest achievable feedback (nominally 7%) and a suitable detuning condition, there is an abrupt switch-on, after some shoulder. The appearance of the shoulder can be interpreted in two ways: First, the ...
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Polarization dynamics in vertical-cavity surface emitting lasers
... Figure 1: Scheme of the setup that was used for the experiments on the polarization dynamics of VCSELs. The abbreviations in the figure denote the different elements of the setup as follows: CL, collimation lens; λ/4, ...
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Polarization properties in the transition from below to above lasing threshold in broad-area vertical-cavity surface-emitting lasers
... Figure 1 shows the setup used for the experiments. The laser beam is collimated by a microscope objective with a numerical aperture of 0.8. VCSEL, cooling elements, and the objective are put into an air-tight box to ...
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Temperature dependence of spontaneous switch-on and switch-off of laser cavity solitons in vertical-cavity surface-emitting lasers with frequency-selective feedback
... when increasing the gain parameter in the forward scan. In Fig. 13, a double-peak structure is the first one to appear in a wide, flat trap followed progressively by structures with more and more peaks. Once the scan ...
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Analysis of spatial emission structures in vertical-cavity surface-emitting lasers with feedback from a volume Bragg grating
... shift in frequency of the VCSEL with this external cavity setup. The shift is barely noticeable, and within the accuracy range of our equipment it is not possible to quantify it. From Eq. (3) one expects to have λ ...
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Design of a LW-VCSEL Optical Source
... The vertical cavity surface emitting laser (VCSEL) is a low cost light source with attractive performance characteristics such as low power consumption, high speed capabilities at low ...
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Spin induced gigahertz polarization oscillations in vertical-cavity surface-emitting laser devices
... The study of spin-controlled optoelectronic devices has revealed a considerable application potential based on the ability of transforming and modulating spin signals efficiently. These properties might enable signal ...
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Supermode Si/III–V lasers and circular Bragg lasers
... whose surface emission is very useful for many ...these lasers would be the relative high (say, more than tens of milliwatts), single-mode optical power emitted broadside and coupled directly into a fiber ...
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Calculating Threshold Current Density and Output Power of Vertical Cavity Surface Emitting Laser
... Fig 2 shows the threshold current density with active region thickness for different transparency concentration. This concentration is required to obtain transparency current density, which effectively increase threshold ...
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