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22 terms
Photonics Dictionary: L
Clear All Filters x
fiber optic x
L x
lightguide
->
fiber optic lightguide
A bundle of optical fibers arranged randomly for the purpose of transmitting energy, not an image.
large-core fiber
Optical fiber with a large core, often a step-index fiber; "large'' is at times defined as greater than 85 µm.
laser diode
->
diode laser
A diode laser is a type of laser that uses a semiconductor diode as the active medium to generate coherent light. Semiconductor diodes are electronic devices that conduct electricity primarily in one...
laser lithotripter
A laser device intended for crushing urinary tract stones so they can be flushed from the body. Light is introduced via fiber optic delivery. A common wavelength used is 2.1 microns produced by...
laser surgery
Laser surgery refers to a medical procedure in which a laser, or focused beam of light, is used as a precision tool to cut, vaporize, coagulate, or otherwise modify tissues for therapeutic or...
laser
A laser, which stands for "light amplification by stimulated emission of radiation," is a device that produces coherent and focused beams of light through the process of optical amplification based...
lateral load test
A method of measuring microbending losses in optical fiber by sandwiching a length of fiber between two parallel plates, with 150-grit sandpaper on the bottom plate. Different weights are placed on...
launch angle
The angle between the light input propagation vector and the optical axis of an optical fiber or fiber bundle.
lay length
In a fiber optic cable, the longitudinal length required for the transmission media, wrapped around a central member, to complete one helical wrap. Also called pitch.
LCPOF
large-core plastic optical fiber
legacy fiber
Older fiber optic cable that may not be suitable for state-of-the-art applications and that is difficult for suppliers to sell.
LFOS
ladar fiber optic sensor
light pipe
Transparent matter that usually is drawn into a cylindrical, pyramidical or conical shape through which light is channeled from one end to the other by total internal reflections. Optical fibers are...
lip
A defect in the cleaved end face of an optical fiber, in the form of a sharp protrusion at the edge of the fiber.
liquid core optical fiber
Multimode straight fiber capable of transporting linearly polarized light with any incident polarization angle, and in which no form of internal stress can develop that could lead to birefringence.
liquid lightguide
An optical fiber with a hollow core filled with a liquid material that has a higher refractive index than the solid surrounding it.
local injection detection system
A device used to evaluate the quality of fiber optic splices made in the field by injecting light into the cladding of the fiber and measuring the output at the other end of the splice.
logic-to-light device
A fiber optic component or system designed in such a way that it can be operated by people without specialized knowledge of the field.
long-wavelength system
In fiber optic communications systems, generally one that operates between 1000 and 1700 nm.
longitudinal offset loss
->
gap loss
The optical power loss caused by a space between axially aligned fibers.
loose-tube buffering
In fiber optic cable, containment of the fiber or fibers within an outer protective tube in which they can move to some extent. The interstices usually are filled with an insulating material. See...
low-loss fiber
Optical fiber that transmits a greater percentage of input light than does high-loss step-index fiber. Low-loss fiber requires higher purity materials and a more sophisticated drawing process and...
Photonics Dictionary
L
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