Entity

Time filter

Source Type


Kurkov A.S.,RAS A.M. Prokhorov General Physics Institute | Dvoyrin V.V.,Fiber Optics Research Center | Marakulin A.V.,RAS Federal Nuclear Center
Optics Letters | Year: 2010

Three all-fiber Ho-doped lasers emitting in the range of 2050-2100 nm were fabricated. The lasers were pumped by an Yb-doped fiber laser at 1147 nm with a power up to 35 W. For all the lasers tested, the output power was found to be as high as 10 W, the efficiency slope being 30%. © 2010 Optical Society of America.


Dianov E.M.,Fiber Optics Research Center
Quantum Electronics | Year: 2010

Abstract. This paper presents a brief overview of the state of the art in fibre optics and its main applications: optical fibre communications, fibre lasers and fibre sensors for various physical property measurements. The future of fibre optics and the status of this important area of the modern technology in Russia are discussed. © 2010 Kvantovaya Elektronika and Turpion Ltd.


Dianov E.M.,Fiber Optics Research Center
Quantum Electronics | Year: 2010

Based on analysis of the structure and optical properties of Tl, Pb and Bi centres in crystals and comparison of their spectra with the near-IR luminescence spectra of bismuth-doped glasses, a model is proposed for the near-IR emitting bismuth centres in glass. Experimental evidence is presented in support of the model. © 2010 Kvantovaya Elektronika and Turpion Ltd.


Dianov E.M.,Fiber Optics Research Center
Laser Physics Letters | Year: 2015

Despite the great success in the development of the Bi-doped fibers technology and the creation of Bi-doped fiber lasers and optical amplifiers, some problems are not solved yet. The main problem is that the nature of bismuth NIR emitting centers is not clear. At present, a number of hypotheses are published, but none of them have been directly confirmed. The aim of this letter is to discuss briefly some of the existing hypotheses and to propose our approach concerning the nature of Bi-related NIR active centers. In previous publications we suggest that Bi-related NIR emitting centers are clusters, consisting of Bi ions and oxygen deficiency centers but not Bi ions themselves. In this letter we present the results of our experiments which confirm this structure of the Bi NIR active centers in germanosilicate fibers. © 2015 Astro Ltd.


Dianov E.M.,Fiber Optics Research Center
Physics-Uspekhi | Year: 2013

The rapid advancement of science and technology in the 19th century resulted in more efficient means of communication, but the demand for information exchange always exceeded technical capabilities. That is why the achievements in science and technology were employed first of all to develop the means of communication. The Chappe brothers built the first optical telegraph between Paris and Lille in 1794, which consisted of a chain of towers located within line of sight distance from each other. Messages were visually transferred from tower to tower by semaphore alphabet. The world's longest optical telegraph line operated between Petersburg and Warsaw and it took 15 minutes to transmit signals. An American artist and entrepreneur Samuel Morse invented an electromagnetic telegraph set and a dot-and-dash code in 1837 to develop more efficient means of communication.

Discover hidden collaborations