Academic Terminology
Laser Threshold
The threshold of a laser is a state in which the small-signal gain is just equal to the resonator loss so …
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Academic Terminology
Threshold Pump Power
The threshold pump power of a laser refers to the pump power value at which the laser threshold is just re …
Laser Components
Laser Gain Medium
In the context of laser physics, a laser gain medium is a medium capable of amplifying the power of light, …
Laser Components
Laser Oscillator
A laser oscillator is essentially a combination of two basic components: an optical amplifier and an optic …
Academic Terminology
Matrix Material
Solid matrix materials can be broadly divided into two categories: crystalline and glass. The body must ha …
Academic Terminology
Four-Level System
The figure above shows a four-level laser system unique to rare earth ions in glass or crystalline matrix …
Academic Terminology
Three-Level System
The first ruby laser is a three-level system, and there are three energy levels in the ruby matrix: E0, E1 …
Academic Terminology
Light Magnification
Atomic systems, such as atoms, ions, and molecules, exist only in discrete energy states. The change from …
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Grades and nomenclature of optical glass
According to the scope of application, optical glass is generally divided into colorless optical glass and …
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Nomenclature of tinted optical glass
Colored optical glass, because of its functions of cut-off absorption, selective absorption, ultraviolet t …