Vertical-external-cavity surface-emitting-laser
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 ...The ...
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Operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser
... Ti:sapphire laser was again used as the pump source. The laser beam was focused onto the sample to give a spot size of roughly 500 m in ...front surface of the ...the cavity axis can be ...
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Quantum modeling of semiconductor gain materials and vertical-external-cavity surface-emitting laser systems
... Corresponding to the emission intensity, the carrier temperatures and the steady-state carrier density show a strong wavelength dependence, as shown in Fig. 20 (b). The carrier temperatures are defined as the ...
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Femtosecond synchronously mode-locked vertical-external cavity surface-emitting laser
... The appearance of multiple pulses can be explained by the rather long time it takes to build up the gain after the pump pulse because the carriers need to relax into the quantum wells. Hence, the effective pumping time ...
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Vector cavity solitons in broad area Vertical-Cavity Surface-Emitting lasers
... an external cavity diode laser in Littrow configuration (Sacher Lasertechnik TEC100-960-60), isolated from the rest of the setup by an optical ...
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Bistability conditions between lasing and non-lasing states for vertical-cavity surface-emitting lasers with frequency-selective optical feedback
... with external filtered optical feedback from a distant diffraction ...the laser parameters and some drawbacks inherent both in the experiment and in the theory, a more exact comparison is difficult and a ...
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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 ...the ...
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Electrically-controlled neuron-like spiking regimes in vertical-cavity surface-emitting lasers at ultrafast rates
... optically-injected vertical-cavity surface-emitting laser (VCSEL) operating at the telecom wavelength of 1300 ...to external stimuli (with controlled strengths and temporal ...
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Control of emitted light polarization in a 1310 nm dilute nitride spin-vertical cavity surface emitting laser subject to circularly polarized optical injection
... Fig1. (a) Setup used in this work to study the effect of polarized optical injection in an optically-pumped 1300 nm spin-VCSEL sample. (b) Optical spectrum of the spin-VCSEL. (c) The L-I curve under LCP pumping for the ...
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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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Characterization of Vertical Cavity Surface Emitting Lasers With Electrical and Optical Derivative Spectroscopy
... The laser cavity was formed by cleaved or polished semiconductor surfaces providing the optical feedback, and the p-n junction was forward biased for external ...edge emitting stripe geometry ...
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Circular polarization switching and bistability in an optically injected 1300 nm spin-vertical cavity surface emitting laser
... In summary, this contribution reports the experimental observation of optical power circular polarization switching (PS) and polarization bistability (PB) in a 1300 nm spin-VCSEL subject to circularly polarized ...
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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
... localized structures that appear in traps in VCSELs with frequency-selective feedback. The investigations clear show that the decisive effect of the device temperature is to control the detuning between VCSEL and VBG ...
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Vertical-Cavity Surface-Emitting Lasers for Ultra-High Speed Photonics
... VCSELs have small size, are low cost, have high‐speed operation, have low power consumption, and can be fabricated into arrays [1,2]. These advantages cause VCSELs to attract much attention for use in photonics, e.g. ...
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Spatially Resolved Absorption Spectroscopy on a Microhollow Cathode Helium Plasma Using a Vertical-Cavity Surface-Emitting Laser
... the laser diode was set at ...the laser light fre- quency, we modulated the diode current by the voltage ap- plied to the external input of a current controller (Thorlabs, LDC202C) from a function ...
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Design of a LW-VCSEL Optical Source
... The most important aspect of the laser structure design is the active region with strained QWs. When simulating the band structure of strained QWs several factors need to be considered. The transition energy ...
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Unit3_LED_LASER_PPT.pdf
... Gives high efficiency and high output capabilities compared to DFB and DBR laser due to small active region... Vertical cavity surface emitting laser (VCSEL)[r] ...
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Controlled propagation of spiking dynamics in vertical-cavity surface-emitting lasers : towards neuromorphic photonic networks
... experimentally the duration of the encoded perturbations, single or multiple spiking patterns can be generated from the first VCSEL-neuron in the system (T-VCSEL). The bottom plots (in red) in figs. 3(e-g) show in turn ...
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Controllable spiking patterns in long-wavelength vertical cavity surface emitting lasers for neuromorphic photonics systems
... In summary, we have reported on the achievement of controllable and reproducible spiking patterns in a 1310nm-VCSEL subject to different polarized optical injection (parallel and orthogonal). Single and multiple spiking ...
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Vertical external cavity semiconductor lasers
... this laser used no post-growth processing of any kind to reduce thermal impedance: the back surface of the intact substrate of the gain structure was made to contact a Peltier cooler using thermally ...
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