Multimode Resonators with a Small Fresnel Number (Lowest-Order Eigenmodes)

The Fabry-Pèrot Interferometer, the confocal and the spherical resonator systems are investigated. The lowest-order traveling-wave type eigenmodes are calculated. Numerical values for the diffraction losses are given. The smallest diffraction losses are obtained for the general-type eigenmode of a confocal resonator system. The eigenfunctions of an open-walled resonator show a point of inflection as their characteristic feature. They are complex if the Fresnel Number is finite. When calculate over appropriate surfaces, their imaginary part, in the region close to the axis, decreases as F increases. In that region the waves resonate between the reflectors. Towards the rim of the system the imaginary part increases rapidly as do the diffracted waves associated with the imaginary part.

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Amplified spontaneous emission and gain characteristics of Fabry-Perot and traveling wave type semiconductor laser amplifiers

IEEE Journal of Quantum Electronics ◽

10.1109/3.7080 ◽

1988 ◽

Vol 24 (8) ◽

pp. 1532-1537 ◽

Cited By ~ 22

Author(s):

L. Thylen

Keyword(s):

Semiconductor Laser ◽

Spontaneous Emission ◽

Traveling Wave ◽

Amplified Spontaneous Emission ◽

Wave Type ◽

Laser Amplifiers ◽

Fabry Perot ◽

Type Semiconductor ◽

Semiconductor Laser Amplifiers

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The Confocal Resonator System with a Large Fresnel Number (V-Type Eigenmodes) (Correspondence)

IEEE Transactions on Microwave Theory and Techniques ◽

10.1109/tmtt.1964.1125859 ◽

1964 ◽

Vol 12 (4) ◽

pp. 482-483 ◽

Cited By ~ 5

Author(s):

H. Lotsch

Keyword(s):

Fresnel Number ◽

Resonator System ◽

Confocal Resonator

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ANALYSIS AND SYNTHESIS OF RADIATION PATTERNS FROM CIRCULAR APERTURES

Canadian Journal of Physics ◽

10.1139/p60-009 ◽

1960 ◽

Vol 38 (1) ◽

pp. 78-99 ◽

Cited By ~ 4

Author(s):

A. Ishimaru ◽

G. Held

Keyword(s):

Radiation Pattern ◽

Traveling Wave ◽

Design Method ◽

Source Distribution ◽

Circular Aperture ◽

Narrow Beam ◽

Wave Type ◽

Numerical Examples ◽

Analysis And Synthesis ◽

Improved Design

Part I considers the problem of determining the source distribution over a circular aperture required to produce a prescribed radiation pattern. In particular, the problem of optimizing the narrow broadside pattern from a circular aperture is discussed in detail and an improved design method over Taylor's for line source is devised. Numerical examples are given.Part II deals with the analysis of the radiation pattern from a circular aperture from γ1 to γ2 with the traveling wave type source functions. Expressions suitable to the analysis and the synthesis are obtained and the narrow-beam and shaped-beam synthesis are discussed.

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Application of superconducting striplines to traveling-wave type LiNbO/sub 3/ optical modulator

IEEE Transactions on Applied Superconductivity ◽

10.1109/77.233502 ◽

1993 ◽

Vol 3 (1) ◽

pp. 2792-2795 ◽

Cited By ~ 7

Author(s):

K. Yoshida ◽

K. Ikeda ◽

K. Saito ◽

Y. Kanda

Keyword(s):

Traveling Wave ◽

Optical Modulator ◽

Wave Type

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Measurement of the temperature of pipes with low dielectric losses in traveling-wave type microwave devices

Measurement Techniques ◽

10.1007/s11018-009-9326-z ◽

2009 ◽

Vol 52 (6) ◽

pp. 673-675

Author(s):

D. A. Loik ◽

A. V. Mamontov ◽

I. V. Nazarov ◽

V. N. Nefedov ◽

T. A. Potapova

Keyword(s):

Traveling Wave ◽

Microwave Devices ◽

Dielectric Losses ◽

Wave Type ◽

Low Dielectric

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Interference and Coherence

Modern Optics Simplified ◽

10.1093/oso/9780198842859.003.0004 ◽

2019 ◽

pp. 92-158

Author(s):

B. D. Guenther

Keyword(s):

Optical Feedback ◽

Superposition Principle ◽

Michelson Interferometer ◽

Orthogonal Polarization ◽

Antireflection Coatings ◽

Multiple Reflections ◽

Optical Coherence Imaging ◽

Fabry Perot ◽

Coherence Imaging ◽

The Waves

The superposition principle states that the sum of solutions of the wave equation is also a solution. Linearity forbids scattering of one photon by another and waves with orthogonal polarization will not interfer and if no interference is observed the light is said to be incoherent. There is no record carried by any of the waves to indicate outside of the overlap region that the waves ever commingled. Interference involve dielectric layers can produce antireflection coatings. Michelson interferometer, temporal coherence and its use in spectroscopy. The interferometer coupled with a light source with well defined coherence properties are currently used in optical coherence imaging. With multiple reflections a Fabry Perot interferometer can be created to provide optical feedback in a laser. Young’s two slits interferometer can be used to measure the size of distant stars.

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Climatology of planetary wave type oscillations with periods of 2–20 days derived from O<sub>2</sub> atmospheric and OH(6-2) airglow observations at mid-latitude with SATI

Annales Geophysicae ◽

10.5194/angeo-27-3645-2009 ◽

2009 ◽

Vol 27 (9) ◽

pp. 3645-3662 ◽

Cited By ~ 21

Author(s):

M. J. López-González ◽

E. Rodríguez ◽

M. García-Comas ◽

V. Costa ◽

M. G. Shepherd ◽

...

Keyword(s):

Sierra Nevada ◽

Planetary Wave ◽

Lower Thermosphere ◽

Maximum Activity ◽

Energy Propagation ◽

Wave Type ◽

Winter Solstice ◽

The Waves ◽

Maximum Occurrence ◽

Dissipation Processes

Abstract. The presence of planetary wave type oscillations at mid-latitudes in the mesosphere/lower thermosphere region has been investigated using airglow observations. The observations were taken with a Spectral Airglow Temperature Imager (SATI) installed at Sierra Nevada Observatory (37.06° N, 3.38° W) at 2900 m height. Airglow data of the column emission rate of the O2 Atmospheric (0-1) band and of the OH Meinel (6-2) band and deduced rotational temperatures from 1998 to 2007 have been used in this study. From these observations a climatology of planetary wave type oscillations at this location is inferred. It has been found that the planetary wave type oscillations of 5-day period is predominant in our data throughout the year, with activity greater than 50% during March/April and October/November months. The planetary wave type oscillations of 2-day period is predominant during both solstices, being predominant during winter solstice in O2 while a 10-day oscillation appears throughout the year with activity around 20% and with maximum activity during spring and autumn equinoxes. The 16-day oscillation has maximum occurrence during autumn-winter while its activity is almost disappeared during spring-summer. No clear seasonal dependence of the amplitude of the planetary wave type oscillations was observed in the cases considered in this study. The waves simultaneously detected in the rotational temperatures deduced from both OH and O2 emissions usually show an upward energy propagation and are affected by dissipation processes.

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