1.5 /spl mu/m vertical cavity surface emitting lasers
Polarization properties in the transition from below to above lasing threshold in broad-area vertical-cavity surface-emitting lasers
... III. DISTRIBUTION OF SPONTANEOUS EMISSION AND THE TRANSITION THROUGH THRESHOLD We consider two nominally identical devices from the design and growth process that show however rather different behavior. The near-field ...
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GaInNAs-based Hellish-vertical cavity semiconductor optical amplifier for 1.3 mu m operation
... /2 cavity length, is done in order to pro- vide optical gain (Figure ...= 1 × 10 17 cm -3 ) on the bottom side, and C-doped ( p = 1 × 10 17 cm -3 ) on the top ...
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Electrically-controlled neuron-like spiking regimes in vertical-cavity surface-emitting lasers at ultrafast rates
... Fig. 1: (1) using directly an electrical signal generator (SG) whose output is connected to the Bias Tee or (2) converting an incoming amplitude-modulated optical signal to the electrical domain using a ...
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Femtosecond synchronously mode-locked vertical-external cavity surface-emitting laser
... 220 m long fibre with coupling efficiency of 55% to ...laser cavity was slightly lengthened beyond the switching ...Fig. 5(b) is the compressed pulse with a width of 925 fs (FWHM) corresponding to a ...
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High frequency continuous birefringence-induced oscillations in spin-polarized vertical-cavity surface-emitting lasers
... ns −1 to obtain the best fit with the experimental findings. For direct comparison, the calculated RF amplitude is plotted with the same colour-coded method used for the experimental plot. The theoretical and ...
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Femtosecond synchronously in-well pumped vertical-external-cavity surface-emitting laser
... laser cavity was shortened from +4 µm to 0 µm, the FWHM of the autocorrelation first narrowed from 12 ps to ...to 5 ps ...from 5 ps to 2 ps. Further cavity shortening only resulted in a drop ...
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Vector cavity solitons in broad area Vertical-Cavity Surface-Emitting lasers
... eqs 1–4 as a function of optical injection power E I is plotted in Fig. 5, in the bistable ...eqs 1–4 have been integrated in two-dimensional settings for the same parameters as in ...Fig. 5 ...
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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 optics and ...
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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
... by Ohmic losses as (dT /dI ≈ 0.053 K/mA). Finding the inverse of this yields dI/dT ≈ 18.9 mA/K. This rate is very close to the one measured for the change in switch-on current and still very close to the rate of change ...
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Polarization dynamics in vertical-cavity surface emitting lasers
... mated using an aspheric antireflection coated lens. After passing through a half-wave plate, the orthogonal polarized components of the VCSEL output are split by a Wollaston prism. For projection onto circular polarized ...
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Design of a LW-VCSEL Optical Source
... [13]Arnob Islam, SamihaIshrat Islam, Saiful Islam, “Designing an all epitaxial 1,550 nm intra-cavity VCSEL using GaInAsN/AlGaInAs in the active region and AlGaAsSb/AlAsSb in top and bottom DBRs”, Optical and ...
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Operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser
... VECSEL sample for near-normal incidence and at a 45° angle of incidence for the pump light. For this experiment, a tunable cw Ti:sapphire laser was used as a pump source. The PL was detected perpendicular to the VECSEL ...
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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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Vertical external cavity semiconductor lasers
... central cavity mode multiplied by the cavity photon ...large cavity mode volume, is therefore a particularly sensi- tive semiconductor laser architecture for ...the 1-µm ...short cavity ...
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Calculating Threshold Current Density and Output Power of Vertical Cavity Surface Emitting Laser
... The working principle of VCSEL is explained by the physics of Bragg reflection. Kavokin analyzed the effect of light absorption [5] using transfer matrix method in multilayer semiconductor devices. Brovelli showed ...
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Free-space optics mode-wavelength division multiplexing system using LG modes based on decision feedback equalization
... Furthermore, in order to make FSO more feasible in respect to high capacity performance, photonic and electronic equalization schemes need to be integrated and explored, which will scale FSO better than through being ...
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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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Structural Analysis of InGaAs Based Vertical Cavity Surface-Emitting Quantum Well Laser
... nm lasers are based on the InGaAsP or InGaAlAs quantum-well (QW) active material system on an InP ...diode lasers suffer poor lasing performance at high temperature operation ...such lasers are poor ...
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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 ! ...@ 1 # ...
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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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