Difference between revisions of "File:Perpetualmo.jpg"
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| + | Curves of the effective emission and absorption cross-section suggested by |
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| + | <ref name="apl"> |
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| + | W.Li, H.Pan, L.Ding, H.Zeng, W.Lu, G.Zhao, C.Yan, L.Su, J. Xu. Efficient diode-pumped |
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| + | $\rm Yb : Gd_2 Si O_5$ laser. [[Appl. Phys. Lett.]] 88, 221117 (2006). |
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| + | </ref> presented in the scientific journal [[Applied Physics letters]]. |
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| + | The maximum of absorption corresponds to almost zero of emission. Such a property is not compatible with the [[Second law of thermodynamics]] and makes such a medium suitable material for the [[perpetual motion machine]] of the second kind. |
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| + | This extraordinary property of $\rm Yb : Gd_2 Si O_5$ ceramics was confirmed also in the publications at the journals [[Optics Express]] |
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| + | <ref name="oe"> |
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| + | W.Li, H.Pan, L.Ding, H.Zeng, G.Zhao, C.Yan, L.Su, J.Xu. Diode-pumped continuous-wave and passively mode-locked Yb : Gd2SiO5 laser. – [[Optics Express]] 14, 686-695 (2006) |
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| + | </ref> and [[Solid State communications]]<ref name="ssc"> |
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| + | C.Yan, G.Zhao, L.Zhang, J.Xu, X.Liang, D.Juan, W.Li, H.Pan, L.Ding, H.Zeng. A new Yb- doped oxyorthosilicate laser crystal: Yb : Gd2SiO5 . – [[Solid State Comm.]]137, 451-455 (2006) |
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| + | </ref>. |
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| + | Using the [[McCumber_relation]] |
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| + | <ref name="cumber"> |
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| + | D.E.McCumber, Einstein relations connecting broadband emission and absorption spectra. – [[Phys.Rev.]] 136 (4A), 954-957 (1964) |
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| + | </ref><ref name="becker> |
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| + | P.C.Becker, N.A.Olson, J.R.Simpson. Erbium-doped fiber amplifiers: fundamentals and theory. – Academic, 1999.</ref> |
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| + | the correction of the emission had been suggested and |
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| + | the claim for such a revolutionary behavior of the cross-sections had beed withdrawn; see article [[McCumber_relation]] for the details and the additional references. |
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| + | |||
| + | ==References== |
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| + | <references/> |
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| + | |||
| + | [[Category:Errors]] |
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| + | [[Category:Pseudo-science]] |
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| + | [[Category:Perpetual motion]] |
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| + | [[Category:Second law of thermodynamics]] |
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| + | [[Category:Lasers]] |
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| + | [[Category:Frauds]] |
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Latest revision as of 09:38, 21 June 2013
Curves of the effective emission and absorption cross-section suggested by [1] presented in the scientific journal Applied Physics letters. The maximum of absorption corresponds to almost zero of emission. Such a property is not compatible with the Second law of thermodynamics and makes such a medium suitable material for the perpetual motion machine of the second kind. This extraordinary property of $\rm Yb : Gd_2 Si O_5$ ceramics was confirmed also in the publications at the journals Optics Express [2] and Solid State communications[3]. Using the McCumber_relation [4][5] the correction of the emission had been suggested and the claim for such a revolutionary behavior of the cross-sections had beed withdrawn; see article McCumber_relation for the details and the additional references.
References
- ↑ W.Li, H.Pan, L.Ding, H.Zeng, W.Lu, G.Zhao, C.Yan, L.Su, J. Xu. Efficient diode-pumped $\rm Yb : Gd_2 Si O_5$ laser. Appl. Phys. Lett. 88, 221117 (2006).
- ↑ W.Li, H.Pan, L.Ding, H.Zeng, G.Zhao, C.Yan, L.Su, J.Xu. Diode-pumped continuous-wave and passively mode-locked Yb : Gd2SiO5 laser. – Optics Express 14, 686-695 (2006)
- ↑ C.Yan, G.Zhao, L.Zhang, J.Xu, X.Liang, D.Juan, W.Li, H.Pan, L.Ding, H.Zeng. A new Yb- doped oxyorthosilicate laser crystal: Yb : Gd2SiO5 . – Solid State Comm.137, 451-455 (2006)
- ↑ D.E.McCumber, Einstein relations connecting broadband emission and absorption spectra. – Phys.Rev. 136 (4A), 954-957 (1964)
- ↑ P.C.Becker, N.A.Olson, J.R.Simpson. Erbium-doped fiber amplifiers: fundamentals and theory. – Academic, 1999.
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