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SLEDs operating in the wavelength range of 1300 and 1400 nm are mostly based on a bulk material and a chip structure both characterized by a low polarization dependence of the gain. On the contrary, devices operating in the 1550 and 1620 nm range make mostly use of a quantum well (QW) active region that has a strong polarization-dependent gain ...
The flashlight module can also be swapped out for a laser head which will produce a visible red laser or IR laser and can be used as a pointer or a flood IR/red visible illuminator. [2] The German Army has started to field an upgraded variant of their basic G36 rifle, which has been allocated the in-service designation G36A2. The G36A2 upgrade ...
A layer of quantum dots is sandwiched between layers of electron-transporting and hole-transporting materials. An applied electric field causes electrons and holes to move into the quantum dot layer and recombine forming an exciton that excites a QD. This scheme is commonly studied for quantum dot display. The tunability of emission wavelengths ...
A dyno torch, dynamo torch, or squeeze flashlight is a flashlight or pocket torch which generates energy via a flywheel. The user repeatedly squeezes a handle to spin a flywheel inside the flashlight, attached to a small generator/dynamo, supplying electric current to an incandescent bulb or light-emitting diode. The flashlight must be pumped ...
The building blocks of quantum computers, called "qubits", while being fast, are error-prone, making it hard to ensure quantum computers are reliable and commercial Google parent Alphabet jumps on ...
This small waterproof tool packs a bunch of life-saving essentials into it, including a 5000mAH power bank, an emergency radio with AM/FM/NOAA weather radio tuning, a flashlight, an SOS alarm.
A photograph showing two Fulton MX-991/U Flashlights, next to an unofficial reproduction and a standard angle-head flashlight. The MX-991/U Flashlight (aka GI Flashlight, Army flashlight, or Moonbeam [1]) from the TL-122 military flashlight series of 1937-1944 and is a development of the MX-99/U flashlight issued in 1963 [clarification needed].
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