quantum cascade distributed feedback laser
Sample Grating Distributed Feedback Quantum Cascade Laser Array
... [1], distributed feedback quantum cascade laser (DFB-QCL) featuring narrow linewidth, high power, and simple fabrication process become extremely useful for spectroscopy [2, ...
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Stable Single Mode Operation of Distributed Feedback Quantum Cascade Laser by Optimized Reflectivity Facet Coatings
... Figure 5 shows the emission spectra of the coating DFB laser at different heat sink temperatures from 20 to 90 °C. The measurements were performed using a NI- COLET 8700 FTIR spectrometer with 0.25 cm −1 reso- ...
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Distributed feedback terahertz frequency quantum cascade lasers with dual periodicity gratings
... Figure 4(d) shows the light-current and voltage-current (LIV) characteristics of sample E. Laser action up to 110 K was achieved, corresponding to a lattice temperature of 135 K, 25,26 i.e., 45 K lower than in the ...
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Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes
... multi-mode laser with a tunable narrow-band ...19 distributed feedback lasers, photonic crystal lasers, 20 and fabricating THz QCLs with MEMS actu- ated ...
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Tapered Quantum Cascade Laser Arrays Integrated with Talbot Cavities
... Quantum cascade laser (QCL), invented in 1994, has been one of the most important light sources in mid- and far-infrared for its wavelength flexibility and portability [1 – ...crystal ...
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Dynamics of a vertical cavity quantum cascade phonon laser structure
... a distributed feedback (DFB) semiconductor SL device was the observation of a threshold when D was tuned to a high-Q cavity mode 13 and acoustic spectral line narrowing 4 ...
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Optical feedback effects on terahertz quantum cascade lasers: modelling and applications
... frequency quantum cascade lasers,” ...of feedback intensity on longitudinal mode properties and optical noise in index-guided semiconductor lasers,” IEEE ...
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Theoretical Investigation of Electronic and Optical Properties of Si/SiGe Quantum Cascade Structures
... It was established that these unipolar intersubband lasers might be realized not only in III-V semiconductors [10-13] but also in IV-IV structures [14-16]. Among semiconductors, the covalent semiconductors Si and Ge have ...
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Laser chemosensor with rapid responsivity and inherent memory based on a polymer of intrinsic microporosity
... We have demonstrated that the polymer PIM-1 is a good chemosensor for detecting low vapor pressure (~10 ppb) DNB vapor. Successful indication of the presence of the analyte, by monitoring the photoluminescence has been ...
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Fully phase-stabilized quantum cascade laser frequency comb
... based Quantum Cascade Laser combs (QCL-combs) are ideal candidates, in this respect, due to the unique possibility to tailor their spectral emission by proper nanoscale design of the quantum ...
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Line defect photonic crystal terahertz quantum cascade laser
... conventional PhC QCLs, such as increased frequency selection capa- bility and directionality, while retaining the typical low-threshold behavior of this kind of laser. Di ff erent QCLs were fabricated with a ...
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Improving the Out-Coupling of a Metal-Metal Terahertz Frequency Quantum Cascade Laser Through Integration of a Hybrid Mode Section into the Waveguide
... For laser emission measurements, the 10 kHz modulation is further modulated with a duty cycle of 50% at 10 Hz in order to match the maximum frequency response of the pyro-electric ...reached laser threshold ...
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Electric field sampling of modelocked pulses from a quantum cascade laser
... This synchronization is achieved by optical injection seeding of the THz QCL cavity us- ing a broadband THz pulse generated by focusing the 800nm reference pulse onto a biased GaAs photoconductive antenna. The injected ...
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An oligofluorene truxene based distributed feedback laser for biosensing applications
... Evanescent optical sensors are analytical devices that measure changes in refractive index at the device surface. These sensors are highly attractive medical diagnostic platforms for the following reasons: (i) they ...
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Silicon germanium materials for terahertz emission
... main quantum well size on emission frequency using an n-type Ge/SiGe on Si (001) QCL structure, and to investigate the effect of changing the size of the main quantum well on the electrical ...
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Self-consistent solutions to the intersubband rate equations in quantum cascade lasers: Analysis of a GaAs/AlxGa1-xAs device
... This is done by assuming equal carrier densities in each subband, calculating the scattering rates and then producing the next best iteration using the series of equations as illus- trated by Eq. ~5!. These new solutions ...
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Measurement of the phase and intensity profile of surface plasmon laser emission
... wave laser with a wavelength of 1064 nm through the transparent InP ...SP laser is collected in transmission on the metal side of the device with a 20 × microscope objective (NA = ...
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Density matrix superoperator for periodic quantum systems and its application to quantum cascade laser structures
... In many practical cases of interest, we need to deal with Hamil- tonians which are partitioned in the block form, and may have high degree of symmetry, especially in cases which deal with periodic systems, where the ...
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Characterizing a Quantum Cascade Tunable Infrared Laser Differential Absorption Spectrometer (QC-TILDAS) for measurements of atmospheric ammonia
... cooled quantum cascade (QC) laser (Alpes Lasers, Neucha- tel, Switzerland) operating in the pulsed mode to provide high stability and increased power output over traditional lead-salt diode lasers ...
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Simultaneous microwave and millimeter-wave signal generation with a 1310-nm quantum dot distributed feedback laser
... Abstract—S imultaneous generation of microwave and millimeter-wave (mm-wave) signals is demonstrated experimentally using a 1310-nm Quantum Dot (QD) Distributed-Feedback (DFB) Laser. The ...
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