high power quantum cascade lasers
High order sideband generation in terahertz quantum cascade lasers
... Quantum Cascade Lasers (QCLs) are powerful intersub- band laser sources operating throughout the mid-infrared (MIR) 1 and terahertz (THz) 2 spectral ...offering high output powers, they also ...
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Planar integrated metasurfaces for highly-collimated terahertz quantum cascade lasers
... In this letter, we report the planar integration of tapered THz QCLs with metasurface structures, which are processed into SSP out-couplers by introducing periodically arranged scatterers. The resulting surface-emitting ...
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Temperature Dependent High Speed Dynamics of Terahertz Quantum Cascade Lasers
... Various approaches have been taken in dealing with this problem [19]–[22], usually by addressing either temperature- dependent or voltage-dependent device behavior in isolation. Our modeling approach, introduced in [23], ...
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Terahertz imaging using quantum cascade lasers — a review of systems and applications
... a high dynamic range can be achieved with cryogenically cooled bolometric ...THz power of 4 mW, despite the QCL being driven with low duty cycle ...source power at these ...the high ...
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Temperature dependent high speed dynamics of terahertz quantum cascade lasers
... delay and rise time are seen to increase non-linearly with increasing temperature, while the steady-state optical output power decreases and ceases altogether at ∼53 K. Because thermal effects take place on a ...
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Coupled-cavity terahertz quantum cascade lasers for single mode operation
... at high pump currents the typical lasing bandwidths of the bound-to-continuum active regions used in this work can extend up to 150 ...cavity lasers, ...
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Investigation of thermal effects in quantum-cascade lasers
... source power density) and the pulsewidth (determines how much the active region heats ...extremely high modulation frequencies in gigahertz should be possible ...achieve high frequency modulation ...
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Surface-emitting terahertz quantum cascade lasers with continuous-wave power in the tens of milliwatt range
... covered by the metallic fingers exhibit higher effective index than those without metal. As a result, the frequency of the band edge modes as a function of the ff is determined by the modal spatial distribution in the ...
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Distributed feedback terahertz frequency quantum cascade lasers with dual periodicity gratings
... The difficulty of achieving controlled spectral and spatial beam patterns from THz QCLs has recently been addressed by engineering two-dimensional photonic crystal lasers 18 and edge-emitting third-order ...
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Low Power Consumption Substrate Emitting DFB Quantum Cascade Lasers
... ultra-low power consumption substrate-emitting distributed feedback (DFB) quantum cascade laser (QCL) was ...threshold power dissipation is reduced to ...depositing high-reflectivity ...
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Accuracy Improvement of Blood Glucose Measurement System Using Quantum Cascade Lasers
... the power distribution on the prism surface was investi- gated, and it was found that some high-intensity spots appear on the prism surface due to the coherency of the laser ...inhomogeneous power ...
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The MBE growth and optimization of high performance terahertz frequency quantum cascade lasers
... output power levels from these two devices, which probably results from a slightly different injector doping level, as reflected by the different device threshold current ...
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Coherent imaging using laser feedback interferometry with pulsed-mode terahertz quantum cascade lasers
... driving power that contribute significantly to Joule heating of the ...emitted power from the device without increasing the average dissipated power and the demand on the cooling ...the high ...
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Efficient method for transport simulations in quantum cascade lasers
... Quantum cascade lasers (QCLs) are relatively new semiconductor devices ...as high optical power output, wide tuning range of the emitted radiation and room temperature ...
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Development of Terahertz Frequency Quantum Cascade Lasers for the Applications as Local Oscillators
... 2]. Quantum-cascade lasers [3] (QCLs), in particular, are promising light sources in the terahertz (THz) spectral region ...Indeed, high resolution heterodyne spectroscopy is a powerful tool ...
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Optical feedback effects on terahertz quantum cascade lasers: modelling and applications
... optical power, indicated by solid lines in Fig. 3, which contain the high frequency component of the SM ...output power without optical feedback is indicated by broken lines for ...
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High Efficiency, Low Power Consumption DFB Quantum Cascade Lasers Without Lateral Regrowth
... years, quantum cascade lasers (QCLs) have proven to be very efficient coherent light sources in the mid-infrared region with a wide variety of applications, such as trace gas sensing, ...
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Continuous-wave highly-efficient low-divergence terahertz wire lasers
... (THz) quantum cascade lasers (QCLs) have undergone rapid development since their demonstration, showing high power, broad-tunability, quantum-limited linewidth, and ...
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High power fibre lasers
... ASE power in cladding-pumped fibre lasers are also ...fibre lasers over the end pumping of single mode ...pump power absorption by the normally ytterbium-doped and neodymium-doped core of our ...
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How To Understand The Physics Of Midinfrared Light From A Laser
... Talukder, “Analytical and computational study of self-induced transparency mode-locking in quantum cascade lasers,” Computer Science and Electrical Engineering Research Review, UMBC (200[r] ...
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