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发表于 2025-3-30 11:54:27
Semiconductor Lasers,emission is that it is possible to design a light source in such a way that stimulated emission of photons will predominate over both spontaneous emission and absorption. If a resonant reflecting structure such as a pair of plane, parallel end faces is provided, a lasing mode can be established and
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发表于 2025-3-30 12:35:20
Optical Amplifiers,to compensate for losses. In early lightwave systems this function was accomplished by using a photodetector to convert the lightwave signal to an electrical current waveform, amplifying it electronically, and then converting it back to an optical form with a laser or high-speed LED. This approach i
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发表于 2025-3-31 08:09:12
Quantum-Well Devices,ice. When the dimensions of the structure are reduced to the point at which they are approaching the same order of magnitude as the electron wavelength some unique properties are observed. This is the case with a class of devices that have come to be known as “quantum well” devices, which feature ve
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发表于 2025-3-31 11:34:57
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