bottom emitting vertical cavity surface emitting lasers
Polarization dynamics in vertical-cavity surface emitting lasers
... longitudinal cavity resonance, the HF-mode will be favored, otherwise the ...the cavity resonance shift with quite different rates with temperature (about ...and cavity resonance are ...
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Analysis of spatial emission structures in vertical-cavity surface-emitting lasers with feedback from a volume Bragg grating
... If the current is increased, the inner part of the lasing aperture starts to lase also, but a certain preference for the perimeter remains (Fig. 3; upper image, right column). A blowup of a characteristic structure is ...
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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
... A glass plate with an uncoated facet at the front and an anti-reflection coated facet at the back is used as a beam sampler to couple out the light from the cavity. The reflection is relying on Fresnel reflection and ...
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Supermode Si/III–V lasers and circular Bragg lasers
... Surface-emitting lasers have been attracting people’s interest over the past two decades because of their salient features such as low threshold current, single-mode operation, and wafer-scale ...
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Polarization properties in the transition from below to above lasing threshold in broad-area vertical-cavity surface-emitting lasers
... the polarization direction for off-axis light is different below and above threshold but there is no detailed investigation. In this work, we characterize the polarization properties of off- axis below-threshold emission ...
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Controllable spiking patterns in long-wavelength vertical cavity surface emitting lasers for neuromorphic photonics systems
... of freedom in comparison to traditional edge-emitting semiconductor lasers. Furthermore, our approach uses inexpensive devices operating at the important telecom wavelength of 1300 nm and therefore totally ...
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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 ...
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Bistability conditions between lasing and non-lasing states for vertical-cavity surface-emitting lasers with frequency-selective optical feedback
... In order to integrate the model equations numerically, a forth-order variable-step method has been used. For low values of the feedback strength – i.e., σ being smaller the bistability threshold (13)–, a smooth LI-curve ...
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Structural Analysis of InGaAs Based Vertical Cavity Surface-Emitting Quantum Well Laser
... VCSELs have a number of advantages over conventional edge emitting lasers. Simpler in processing, emission in a single longitudinal mode naturally, lower divergence, and preparation in the form of large and ...
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Research on Photoelectric Characteristics of VCSEL
... many lasers, the Vertical Cavity Surface Emitting Laser (VCSEL) has attracted more attention for its characteristics of easy operation and low power ...
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Spin induced gigahertz polarization oscillations in vertical-cavity surface-emitting laser devices
... Spin-controlled vertical-cavity surface-emitting lasers (VCSELs) have been intensively studied in recent years because of the low threshold feasibility and the nonlinearity above ...
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Femtosecond synchronously mode-locked vertical-external cavity surface-emitting laser
... center lasers [11, ...increasing cavity length (shown in ...center lasers, where the separation between pulses increases for increasing cavity mismatch [14, ...dye lasers cannot be ...
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Femtosecond synchronously in-well pumped vertical-external-cavity surface-emitting laser
... the cavity was adjusted to the positions of − ...barrier-pumped lasers is difficult because the gain material (emission wavelengths) and the wafer structure were ...
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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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Vector cavity solitons in broad area Vertical-Cavity Surface-Emitting lasers
... We have also proved that the vectorial nature of the CS does not come from the background but it is inherent to the VCSEL. We first measure the s 3 parameter of a cavity soliton by inserting an iris in the ...
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Characterization of Vertical Cavity Surface Emitting Lasers With Electrical and Optical Derivative Spectroscopy
... Light derivatives show some of the same characteristics as the current derivatives. The dL/dV curve is a measure of how efficient the light output is to the amount of drive voltage. The extreme rise in the red curve ...
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Vertical-Cavity Surface-Emitting Lasers for Ultra-High Speed Photonics
... material refractive index, and f is the slowdown factor of light inside TCC. After each round trip, the laser light is injected into the VCSEL cavity with a coupling ratio η . OFB is treated as the time delay of ...
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Polarization switches in vertical cavity surface emitting lasers
... In this talk, we investigated the full nonlinear polarization dynamics of a VCSEL emitting in the fundamental transverse mode. The system of Maxwell-Bloch equations for the laser emission is reduced to a ...
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Vertical cavity surface emitting lasers: Design, characterisation and integration
... Specifically the use of optimised DBRs coupled to a graded index separate confinement heterostructure (GRINSCH) cavity is shown to improve the high power characteris[r] ...
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High frequency continuous birefringence-induced oscillations in spin-polarized vertical-cavity surface-emitting lasers
... In summary, we report theoretically and experimentally on birefringence-induced continuous oscillations in a spin-VCSEL. Stability analysis reveals Hopf bifurcations which bound regions of limit cycles yielding ...
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