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optical radiation Dictionary Terms
dark current
The current that flows in a photodetector when there is no optical radiation incident on the detector and operating voltages are applied.
optoelectronic
Pertaining to a device that responds to optical power, emits or modifies optical radiation, or utilizes optical radiation...
dark noise
The noise produced in a photodetector when the photocathode is shielded from all external optical radiation and operating...
enclosed laser device
A laser or laser system positioned within an enclosure to prevent dangerous optical radiation from leaving the enclosure.
nonlinear optical crystal
An optical crystal that possesses a strong nonlinear dielectric response function to optical radiation. A material with a...
ground state
Also known as ground level. The lowest energy level of an atom or atomic system. A material in the ground state is not...
active region
The layer of material in a laser diode from which the optical radiation is emitted; light producing region
modulation frequency
Rate at which optical radiation or a signal is varied through the use of a mechanical or electronic chopper. Also called...
grating monochromator
An optical instrument used to isolate a narrow bandwidth of optical radiation using a diffraction grating as the dispersive...
(9 results found)
May 2024
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