Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q4876189> ?p ?o }
Showing triples 1 to 38 of
38
with 100 triples per page.
- Q4876189 subject Q6468189.
- Q4876189 subject Q7213725.
- Q4876189 subject Q8411330.
- Q4876189 subject Q8790102.
- Q4876189 abstract "The beam propagation method (BPM) is an approximation technique for simulating the propagation of light in slowly varying optical waveguides. It is essentially the same as the so-called parabolic equation (PE) method in underwater acoustics. Both BPM and the PE were first introduced in the 1970s. When a wave propagates along a waveguide for a large distance (larger compared with the wavelength), rigorous numerical simulation is difficult. The BPM relies on approximate differential equations which are also called the one-way models. These one-way models involve only a first order derivative in the variable z (for the waveguide axis) and they can be solved as "initial" value problem. The "initial" value problem does not involve time, rather it is for the spatial variable z.The original BPM and PE were derived from the slowly varying envelope approximation and they are the so-called paraxial one-way models. Since then, a number of improved one-way models are introduced. They come from a one-way model involving a square root operator. They are obtained by applying rational approximations to the square root operator. After a one-way model is obtained, one still has to solve it by discretizing the variable z. However, it is possible to merge the two steps (rational approximation to the square root operator and discretization of z) into one step. Namely, one can find rational approximations to the so-called one-way propagator (the exponential of the square root operator) directly. The rational approximations are not trivial. Standard diagonal Padé approximants have trouble with the so-called evanescent modes. These evanescent modes should decay rapidly in z, but the diagonal Padé approximants will incorrectly propagate them as propagating modes along the waveguide. Modified rational approximants that can suppress the evanescent modes are now available. The accuracy of the BPM can be further improved, if you use the energy-conserving one-way model or the single-scatter one-way model.".
- Q4876189 wikiPageExternalLink ee5390cem.htm.
- Q4876189 wikiPageExternalLink Poster_BPM.pdf.
- Q4876189 wikiPageExternalLink optibpm.
- Q4876189 wikiPageExternalLink bpm.php.
- Q4876189 wikiPageExternalLink rsoft-passive-device-beamprop.html.
- Q4876189 wikiPageWikiLink Q1417308.
- Q4876189 wikiPageWikiLink Q1826712.
- Q4876189 wikiPageWikiLink Q203989.
- Q4876189 wikiPageWikiLink Q2068418.
- Q4876189 wikiPageWikiLink Q220184.
- Q4876189 wikiPageWikiLink Q273163.
- Q4876189 wikiPageWikiLink Q29175.
- Q4876189 wikiPageWikiLink Q3191702.
- Q4876189 wikiPageWikiLink Q3198.
- Q4876189 wikiPageWikiLink Q3749103.
- Q4876189 wikiPageWikiLink Q466686.
- Q4876189 wikiPageWikiLink Q48297.
- Q4876189 wikiPageWikiLink Q51501.
- Q4876189 wikiPageWikiLink Q5157313.
- Q4876189 wikiPageWikiLink Q5348910.
- Q4876189 wikiPageWikiLink Q588725.
- Q4876189 wikiPageWikiLink Q597069.
- Q4876189 wikiPageWikiLink Q623950.
- Q4876189 wikiPageWikiLink Q6468189.
- Q4876189 wikiPageWikiLink Q7213725.
- Q4876189 wikiPageWikiLink Q7542169.
- Q4876189 wikiPageWikiLink Q82811.
- Q4876189 wikiPageWikiLink Q8411330.
- Q4876189 wikiPageWikiLink Q860615.
- Q4876189 wikiPageWikiLink Q8790102.
- Q4876189 wikiPageWikiLink Q9128.
- Q4876189 comment "The beam propagation method (BPM) is an approximation technique for simulating the propagation of light in slowly varying optical waveguides. It is essentially the same as the so-called parabolic equation (PE) method in underwater acoustics. Both BPM and the PE were first introduced in the 1970s. When a wave propagates along a waveguide for a large distance (larger compared with the wavelength), rigorous numerical simulation is difficult.".
- Q4876189 label "Beam propagation method".