threshold bottom emitting vertical cavity lasers
Polarization dynamics in vertical-cavity surface emitting lasers
... the threshold minimum hints to the gain dispersion mechanism proposed by Choquette et ...longitudinal cavity resonance, the HF-mode will be favored, otherwise the ...the cavity resonance shift with ...
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Bistability conditions between lasing and non-lasing states for vertical-cavity surface-emitting lasers with frequency-selective optical feedback
... feedback strength, the LI-curves show a small pedestal before the abrupt turn-on (Figure 6a). The pedestal is the remnant of high-amplitude oscillations after time averaging. The pump current corresponding to the abrupt ...
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Characterization of Vertical Cavity Surface Emitting Lasers With Electrical and Optical Derivative Spectroscopy
... laser threshold, with a vertical rise in the blue conductance curve ...After threshold both curves also start to roll over to another slope at 1650mV (~ ...
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Femtosecond synchronously mode-locked vertical-external cavity surface-emitting laser
... center lasers [11, ...the threshold might be crossed a second time (or even ...increasing cavity length (shown in ...center lasers, where the separation between pulses increases for increasing ...
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Spontaneous formation of vector vortex beams in vertical-cavity surface-emitting lasers with feedback
... the threshold current and thus the available mate- rial gain at threshold is much lower for these quasi-scalar vortices ...the threshold is only 200 mA at 46 ◦ C ...
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Electrically-controlled neuron-like spiking regimes in vertical-cavity surface-emitting lasers at ultrafast rates
... In particular, VCSELs have attracted great research interest for use in neuromorphic photonics, given their inherent advantages, such as ultra-small footprint, low manufacturing cost, high-speed, potential for large ...
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Polarization properties in the transition from below to above lasing threshold in broad-area vertical-cavity surface-emitting lasers
... Let us turn our attention to the general case of the nonlinear Eq. (4). We can simplify the analysis by neglecting the joint fluctuation of the term I E and replace the intensity with its mean value I in this term. This ...
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Analysis of spatial emission structures in vertical-cavity surface-emitting lasers with feedback from a volume Bragg grating
... for vertical-cavity surface-emitting lasers (VCSELs), both for medium-sized devices emitting Gaussian modes [4,5] and for broad-area devices emitting Fourier modes ...at ...
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Controlled propagation of spiking dynamics in vertical-cavity surface-emitting lasers : towards neuromorphic photonic networks
... a threshold in perturbation’s intensity needs to be exceeded to obtain and propagate a spiking response through our photonic neuronal circuit (as it is the case in biological ...
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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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Polarization switches in vertical cavity surface emitting lasers
... the threshold and the nonlinear anisotropies can be neglected, an increase in the pumping current means an increase of the photons in the lasing mode according to ...
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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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Physical insight into the polarization dynamics of semiconductor vertical-cavity lasers
... semiconductor vertical-cavity surface- emitting lasers ~ VCSELs ! is an interesting subject to ...these lasers to be indifferent to the polarization ...
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Free-space optics mode-wavelength division multiplexing system using LG modes based on decision feedback equalization
... A FSO MWDM system of seven Laguerre-Gaussian (LG) modes based on DFE has been simulated in OptSim [26] and exhibited illustratively in Fig. 1. The FSO MWDM system consists of three parts; transmitter, FSO channel, and ...
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Research on Photoelectric Characteristics of VCSEL
... the Vertical Cavity Surface Emitting Laser (VCSEL), we adopted the simplex method to determine the optimal solution of the model parameters on the basis of experimental ...
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Operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser
... overlap between pump and QWs. Indeed, by model- ing the pump electric field distribution, the absorp- tion at each QW inside the current sample was also examined. It is found that three QWs located in the central part of ...
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Polarization fluctuations in vertical-cavity semiconductor lasers
... Next we have measured the correlation between the po- larization noise in f and x , which, according to Sec. IV and @ 11 # , should be noticeable as a rotation of the elliptical noise cloud on the Poincare´ sphere. For ...
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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 currents, and a ...
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Femtosecond synchronously in-well pumped vertical-external-cavity surface-emitting laser
... different cavity lengths were also investigated. We refer to the optimal cavity position (mismatch 0) as the cavity length, where the highest net gain is seen by the laser pulse and the maximum ...
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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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