cutoff wavelength

cutoff wavelength

[′kət‚ȯf ′wāv‚leŋkth]
(electromagnetism)
The ratio of the velocity of electromagnetic waves in free space to the cutoff frequency in a uniconductor waveguide.
The wavelength corresponding to the cutoff frequency.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
However, in actual design, the absorption outside the cutoff wavelength cannot be exactly zero, so the selection of the absorber's cut-off wavelength must give consideration to both the absorption and energy loss.
The device exhibited a peak response at a wavelength of 340 nm, which is in the UV-A region, with a 3dB bandwidth of 26 nm and a cutoff wavelength of 353 nm.
Because the corresponding cutoff wavelength [[lambda].sub.c] (nm) = 1240/[E.sub.g] = 1240/2.0 [approximately equal to] 620 nm, the enhanced short-wavelength responses within 400~700 nm were thought to be resulting from the light-absorption of NPS layers.
When [[lambda].sub.c] refers to the cutoff wavelength of the dominant mode ([TE.sub.10]) in rectangular waveguides, i.e., [[lambda].sub.c] = 2[a.sub.1], the cutoff wavelength ratio in waveguides with and without ridges is:
where [k.sub.c] = [omega] [square root of ([mu][epsilon])] = 2[pi]/[[lambda].sub.c] is the cutoff wavenumber with [OMEGA] denoting the angular frequency and [[lambda].sub.c] being the cutoff wavelength. [OMEGA] is a simply or multiply connected domain with boundary [partial derivative][OMEGA].
The types of measurements discussed included attenuation/ loss, chromatic dispersion, cross talk, cutoff wavelength, effective area, effective index, four-wave mixing efficiency, index of refraction profile, mode-field diameter, non-linear coefficients, polarization dependent loss and polarization-mode dispersion.
The cutoff wavelength effect caused by the fictitiously created waveguide can be observed.
It can easily be seen that under the same conditions, relative to without Ti[Cl.sub.4] pretreatment, the absorbance of ZnO films increased after Ti[Cl.sub.4] pretreatment and light absorption cutoff wavelength presented a remarkable red shift, effectively broadening the range of ZnO on the absorption of sunlight.
In general, m and p have the same value; however, when the guided modes are near to the cutoff wavelength, m and p can be different.