optical mode

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optical mode

[′äp·tə·kəl ‚mōd]
(solid-state physics)
A type of vibration of a crystal lattice whose frequency varies with wave number only over a limited range, and in which neighboring atoms or molecules in different sublattices move in opposition to each other.
References in periodicals archive ?
This provides a natural explanation for wave-particle duality, with the transverse mode corresponding to the wave aspects of the deformations and the longitudinal mode corresponding to the particle aspects of the deformations.
As a result, other transverse modes are generated beside fundamental transverse mode which in turn degrades beam quality of the laser [4].
In our case, the unperturbed transverse mode functions for TM-modes are given by (3).
Here, two different polarizations of incident light are considered, with the wave vector k along the z-axis and the electric field E perpendicular to the chain axis (z-axis) for the transverse mode, and with k along the X-axis and E parallel to the chain axis (x-axis) for the longitudinal mode, respectively (see the inset of Figure 1(a) and Figure 2).
The effect of the collision with neutrals does not affect the instability condition of the system in both the longitudinal and transverse mode of propagation.
As it is possible to obtain a speckle noise reduction effect, regardless of transverse mode or coherent length of laser, it is possible to apply this technology to a variety of lasers.
Specifically the model shows excellent transverse mode quality ([M.
In this variant, which is the inverse of the normal magnetic mirror effect whereby energy is transferred from the longitudinal to the transverse mode when a charged particle is transported into a region of high magnetic field, nearly all the transverse energy is transferred into the longitudinal mode, an effect described as adiabatic focusing or collimation.
The devices offer single longitudinal and fundamental transverse mode performance with CW powers of 100 mW, (DL-LS2032) and 150 mW, (DL-LS2031, DL-LS2052) at a lasing wavelength of 808 nm.

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