By Arthur L. Schawlow (auth.), Raymond Y. Chiao (eds.)
This Festschrift is a suite of essays contributed via scholars, colleagues, and advert mirers to honor an eminent student on a unique anniversary: Charles not easy Townes at the get together of his eightieth birthday, July 28, 1995. In 1964, Townes shared the Nobel Prize in physics with Alexander Mikhailovich Prokhorov and Nikolai Gen nadyevich Basov "for basic paintings within the box of quantum electronics, which has ended in the development of oscillators and amplifiers in accordance with the maser-laser precept. " His contributions have lined a much broader quarter, even though. His fruitful pursuits spanning numerous many years have incorporated many medical topics, includ ing, microwave spectroscopy and astrophysics (other articles during this quantity will extend extra in this point). He has additionally contributed to public provider, having served because the chairman of the technology and know-how Advisory Committee for NASA's Apollo application, and as a member and vp of the President's technology Advisory Committee. because the huge, immense breadth of contributions from his scholars exhibits, he has proficient students who're now in quite a lot of fields. The contributions from his many admirers, between whom are 9 fellow Nobel laureates, attest to his influence on many disciplines starting from electric engi neering to drugs. His impression extends even to theology, as is indicated through one essay. The commonly foreign personality of this Festschrift displays his deep trust within the overseas, common nature of science.
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Extra resources for Amazing Light: A Volume Dedicated To Charles Hard Townes On His 80th Birthday
4 Conclusion This essay has been, by intention, highly personal and even idiosyncratic. I have not attempted to give a fair description of what other people were doing or of how the field as a whole has developed and I hope that the many fine scientists and interesting problems which are not mentioned here do not feel slighted. I have tried to show how one infrared astrophysical spectroscopist saw some frustrating problems in the field, which arose because our observational skills had gotten ahead of our theoretical underpinning.
1 (a) should be unusually noise free. The particular conditions assumed in Figs. 3 are intended only for illustrative purposes. Other choices in the laser parameters might well provide more optimum results. 3 Coupled Field Equations and Photon Noise It should be emphasized that we are dealing with the case of weak coupling between the two cavities for which the middle-mirror transmission coefficient satisfies, T « As « 1. In order to demonstrate the photon noise reduction properties of the system, it is necessary to consider the coupled field equations for the two cavities in this limit.
P. Chebotayev we have called a "Laser Stabilitron," could be produced with almost any of the commonly known cw lasers. It has been shown previously that saturated absorption inside a single laser cavity produces a bistable regime with hysteresis effects . There, positive feedback between the optical field and the amount of absorption results. Increasing the field reduces the absorption, thereby decreasing the loss and increasing the intensity. Hysteresis phenomena appear in such a system when the change in saturated absorption exceeds the change in saturated gain, and it has been shown theoretically that a large increase in quantum fluctuations can occur in a laser with such an intra-cavity saturable absorber .
Amazing Light: A Volume Dedicated To Charles Hard Townes On His 80th Birthday by Arthur L. Schawlow (auth.), Raymond Y. Chiao (eds.)