vertical cavity quantum well lasers
Dynamics of a vertical cavity quantum cascade phonon laser structure
... high-Q cavity mode 13 and acoustic spectral line narrowing 4 ...In lasers this is achieved for light by increasing the effective path length in the gain medium by placing it within an optical cavity, ...
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Vertical external cavity semiconductor lasers
... a quantum well SESAM structure, the saturation fluence is an order of magnitude ...long cavity, with repetition rate of 328 MHz, in which the absorber had time to recover within the round trip ...of ...
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Structural Analysis of InGaAs Based Vertical Cavity Surface-Emitting Quantum Well Laser
... long-wavelength vertical- cavity surface-emitting lasers (LW-VCSELs) in order to realize reduced optical loss, as well as increasing current and optical ...
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Femtosecond synchronously in-well pumped vertical-external-cavity surface-emitting laser
... surface-emitting lasers (VECSELs) have been demonstrated to produce high continuous wave (CW) average output powers with excellent beam quality ...multiple quantum well (MQW) based semiconductor ...
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Investigating Scaling Effects on The Static Characteristics of Long-Wavelength Vertical Cavity Lasers (VCSELs)
... wavelength vertical-cavity surface-emitting laser (VCS EL) lasing at 1550 nm have been studied based on the influence of the oxide aperture ...external quantum efficiency have been ...
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Dynamics importance sampling for the collection of switching events in vertical cavity surface emitting lasers
... [14] S. Beri, R. Mannella, and P. V. E. McClintock, Dynamics importance sampling for the activation problem in nonequilibrium continuous systems and maps in Noise in Complex Systems and Stochastic Dynamics II, edited by ...
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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 ...
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Dynamic modelling of electrooptically modulated vertical compound cavity surface emitting semiconductor lasers
... the cavity as an alternative to current modulation; see ...semiconductor lasers involving direct modulation of the photon lifetime promise better dynamic properties than lasers with current ...
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Characterization of Vertical Cavity Surface Emitting Lasers With Electrical and Optical Derivative Spectroscopy
... The Proton VCSEL structure consists of two DBR mirrors (one on top and one on bottom, a region of proton damage, active region. The proton bombarded layer provides good current confinement but little or no optical ...
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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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Polarization fluctuations in vertical-cavity semiconductor lasers
... all lasers, but are exceptionally strong in semiconductor vertical-cavity surface-emitting lasers ~ VCSELs ! ...large quantum-limited laser linewidth @ 1 # ...
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Population inversion in optically pumped asymmetric quantum well terahertz lasers
... examined more closely in Fig. 6. Here lies the ultimate con- clusion for an optically pumped three-level laser based on a single stepped quantum well and operating in the terahertz or far-infrared region of ...
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Quantum dot micropillar lasers subject to coherent time delayed optical feedback from a short external cavity
... exhibit the case where either the strong or the weak mode are in phase while its counterpart is out of phase. Both scenarios lead to a significant decrease in bunching as in both cases one mode is stabilized, which ...
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Delay-differential-equation modeling of mode-locked vertical-external-cavity surface-emitting lasers in different cavity configurations
... Time-delayed model We consider last an alternative, and so far hypothetic, case of the central chip being the SESAM, with the gain chip and the mirror m terminating the cavity, which is [r] ...
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Optical Gain and Confinement in Gaas/Algaas Structure Quantum Well Lasers
... multiple quantum wells as active region will provokes the optical gain expansion as the maximum gain get on higher standard according to the quantum well structures wells ...
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Gain optimization in optically pumped AlGaAs unipolar quantum-well lasers
... of quantum-well (QW) structures, in respect to maximizing the stim- ulated gain in optically pumped intersubband ...supersymmetric quantum mechanics (SUSYQM) to an initial Hamiltonian, in order to ...
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Polarization switches in vertical cavity surface emitting lasers
... energy is then smaller than that calculated using the simplified double-well model. From the physical point of view, the behavior of the activation energy can be justified as follow. When the system is close to ...
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Design of linear and star shaped macromolecular organic semiconductors for photonic applications
... lower threshold for ampli fi ed spontaneous emission (ASE, which is a process closely related to lasing but the ampli fi ed emission does not involve a resonant cavity or DFB structure). By altering the thickness of ...
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Operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser
... cial. First, the absorption can be further enhanced by optimizing the overlap integral of the pump field over QWs together with grouping QWs. Second, the ab- sorption per QW as well as the number of QWs can be ...
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Theory of terahertz intervalence band polaritons and antipolaritons
... Terahertz time domain spectroscopy (THz-TDs) has application in Chem istry and Biochemistry, security, imaging in medicine, communications as well as manufacturing processes [39-41]. The system involves directing ...
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