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A distributed feedback (DFB) quantum cascade laser [25] is similar to a Fabry–Pérot laser, except for a distributed Bragg reflector (DBR) built on top of the waveguide to prevent it from emitting at other than the desired wavelength. This forces single mode operation of the laser, even at higher operating currents.
A distributed-feedback laser (DFB) is a type of laser diode, quantum-cascade laser or optical-fiber laser where the active region of the device contains a periodically structured element or diffraction grating. The structure builds a one-dimensional interference grating (Bragg scattering), and the grating provides optical feedback for the laser.
Thorlabs, Inc. is an American privately held optical equipment company headquartered in Newton, New Jersey. [2] The company was founded in 1989 by Alex Cable , who serves as its current CEO . His daughter, Jennifer Cable, serves as president. [ 3 ]
Band diagram of a single stage in a typical interband cascade laser. The cascade stage is divided into an active region, electron injector, and hole injector.The groups of quantum wells that constitute each region are indicated.
However, the location of the feedback element (the grating) causes the DBR and the DFB to have distinct operational characteristics. Because the grating is distributed all along the gain region in the DFB, the grating and gain region experience similar conditions as the device is tuned with current and temperature.
Quantum Computation Language (QCL) is one of the first implemented quantum programming languages. [54] The most important feature of QCL is the support for user-defined operators and functions. Its syntax resembles the syntax of the C programming language and its classical data types are similar to primitive data types in C. One can combine ...
Alpes Lasers S.A. is a Swiss engineering company and manufacturer of Infrared lasers and electrical drivers based in St-Blaise, Canton of Neuchâtel.The company was the first to commercialize the quantum-cascade laser (QCL) for scientific, [2] [3] industrial [4] and medical [5] use. [6]
1,2-Difluorobenzene, also known as DFB, is an aromatic compound with formula C 6 H 4 F 2. This colorless flammable liquid is a solvent used in the electrochemical studies of transition metal complexes. Compared to most conventional halogenated aliphatic and aromatic solvents, it possesses an exceptionally high dielectric constant (ε 0 = 13.8 ...