vertical cavity surface-emitting devices
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 threshold, ...
8
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 ...external ...
6
High Power Pulsed Intra-Cavity Frequency Doubled Vertical Extended Cavity Blue Laser Arrays
... Surface emitting lasers can easily be arranged in a two-dimensional ...diameters devices in a hexagonal configuration with a 200 μm spacing and tested them under CW and quasi-CW operating ...~450 ...
9
Controlled propagation of spiking dynamics in vertical-cavity surface-emitting lasers : towards neuromorphic photonic networks
... intensity has to be exceed to provoke excitation and firing activity in individual neurons and neuronal circuits. Furthermore, figs. 3 and 4 also reveal that the intensity of the spiking signals obtained from both ...
8
Controllable spiking patterns in long-wavelength vertical cavity surface emitting lasers for neuromorphic photonics systems
... available devices operating at the telecom wavelength of 1310 nm offer great promise for all optical digital-to- spiking format signal conversion and photonic spiking information processing modules for use in ...
15
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 ...
6
Characterization of Vertical Cavity Surface Emitting Lasers With Electrical and Optical Derivative Spectroscopy
... distance. Devices that are packaged with a protective cover (can) limit the magnification to about 20 X due to the space between the device and the protective ...on devices with the chip exposed by removing ...
82
Control of emitted light polarization in a 1310 nm dilute nitride spin-vertical cavity surface emitting laser subject to circularly polarized optical injection
... Spin-polarized vertical-cavity surface-emitting lasers (VCSELs) form an important class of devices in the rapidly growing field of ...
5
Bistability conditions between lasing and non-lasing states for vertical-cavity surface-emitting lasers with frequency-selective optical feedback
... gain-guided devices with an aperture diameter of 15 µm from EMCORE ...external cavity is set up in Littman configuration, ...external cavity is about 31 ...
13
Femtosecond synchronously mode-locked vertical-external cavity surface-emitting laser
... A synchronously mode-locked 980 nm VECSEL has been reported. Detailed studies of the laser characteristics as a function of pump duration and cavity tuning were performed showing the potentials as well as the ...
12
Polarization properties in the transition from below to above lasing threshold in broad-area vertical-cavity surface-emitting lasers
... 40 µm [35], it can be significantly enhanced by the Petermann excess factor. The value of K depends extremely strongly on the inhomogeneities and imperfections in the construction of a particular device. The best results ...
11
Structural Analysis of InGaAs Based Vertical Cavity Surface-Emitting Quantum Well Laser
... A distributed Bragg reflector (DBR) consists of a quarter-wave length thick layer mirror. In order to ensure low threshold operation in long-wavelength VCSEL devices, both DBRs are required to provide power ...
6
Temperature dependence of spontaneous switch-on and switch-off of laser cavity solitons in vertical-cavity surface-emitting lasers with frequency-selective feedback
... For large initial detuning (low temperatures in the experiment), high-order solitons (vortex solitons in the 2D experiment, closely packed multi-humped structures in the 1D simulations) can appear as the first structure ...
19
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 ...
8
Vertical cavity surface emitting lasers: Design, characterisation and integration
... the cavity photon lifetime and carrier recombination lifetime ...large cavity (e,g, 100x100x100pm) are on the order of a few ...the cavity dimensions are reduced, in one dimension, to 1pm, ...
211
Ultrafast circular polarization oscillations in spin-polarized vertical-cavity surface-emitting laser devices
... In summary, we have investigated the polarization dynamics of an electrically pumped vertical-cavity surface-emitting laser after additional spin injection at room temperature. We could ...
10
Supermode Si/III–V lasers and circular Bragg lasers
... low-divergence surface-normal emission also facilitates output coupling and ...Although vertical cavity surface emitting lasers (VCSELs) have already been commercially available, their ...
163
Polarization dynamics in vertical-cavity surface emitting lasers
... charge-coupled devices (CCD) ...the devices, since the linear anisotropies – and hence the polarization properties – of VCSEL structures depend on mechanical stress ...
28
Circular polarization switching and bistability in an optically injected 1300 nm spin-vertical cavity surface emitting laser
... Spin-polarized vertical cavity surface emitting lasers (spin-VCSELs) have been of great interest in recent years due to their functionality and characteristics [1- ...such devices, the ...
5
Electrically-controlled neuron-like spiking regimes in vertical-cavity surface-emitting lasers at ultrafast rates
... dynamics are controllably generated in the device by encoding external perturbations (stimuli) in the VCSEL’s applied bias current while subject to constant external optical injection. Under this technique, the constant ...
7