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glossary
- Single mode fiber optic: fiber optic enabling the propagation of only one transverse mode ( the fundamental mode )
- Waist: position along the propagation axis where a laser beam has the smallest size
- Elliptical beam: a beam in which « equi-intensity » curves in a plane perpendicular to the propagation axis are elliptical
- Lens: optical component with two refractive surfaces axially symmetrical for redirecting the light in a controlled manner
- Afocal system: optical system without focal planes, so that the image of a point at infinity is also at infinity
- Transmission: ratio between transmitted radiation power (or intensity or amplitude) and incident radiation power (or intensity or amplitude)
- Spatial mode: specific spatial distribution of the electromagnetic field in a plane perpendicular to the propagation axis of a light wave possibly emitted by a laser or possibly propagating in a waveguide ( like, for instance, a fiber optic ) - also called transverse mode
- Fiber optic: long cylindrical optical component guiding light
- Effective focal length: algebraic distance from the primary/secondary principal plane of an optical system to its front/back focal plane
- Coupling efficiency ( fiber optics ): ratio between the optical power emitted by a source and the optical power effectively injected in a fiber optics