A Study on Photonic Frequency Conversion Efficiency Using Delayed-sequence Decoding in Software Definable Radio Network

Author(s):  
Takeshi Higashino ◽  
Katsutoshi Tsukamoto ◽  
Shozo Komaki
2016 ◽  
Vol 31 (6) ◽  
pp. 065003
Author(s):  
Christian Schildbach ◽  
Duu Sheng Ong ◽  
Hans Hartnagel ◽  
Lorenz-Peter Schmidt

2000 ◽  
Author(s):  
Moshe B. Oron ◽  
David Eger ◽  
Moti Katz ◽  
Ariel Bruner ◽  
Abraham Englander ◽  
...  

1994 ◽  
Vol 49 (5) ◽  
pp. 4066-4076 ◽  
Author(s):  
J. T. Murray ◽  
N. Peyghambarian ◽  
R. C. Powell ◽  
R. A. Stolzenberger ◽  
S. Jie ◽  
...  

Author(s):  
R. V. Chulkov ◽  
O. P. Korozhan ◽  
V. A. Orlovich

In this paper, we present the results of the study of the statistics of pulse energy fluctuations in a Raman laser under optical pump by the multimode nanosecond pulses. A system of coupled differential equations for slowly varying envelopes of the pump field and first three Stokes lines was integrated numerically with taking into account spatial inhomogeneity of the pump beam, spontaneous noise, and optical feedback. Data of the numerical simulation revealed a sharp increase in the fluctuation amplitude in the nonlinear regime of Raman frequency conversion when the optical length of the Raman cavity was matched with the cavity length of the multimode pump laser. At a mean 1st Stokes conversion efficiency of 3.5–3.8 %, the calculations showed an increase in the coefficient of variation (CV) of a random value from 9 % to 118 %. In the linear regime of Raman frequency conversion, when the conversion efficiency was 0.2–0.03 %, a further increase in the CV value up to 270–500 % was predicted. It is also numerically shown that the fluctuation statistics under the conditions of the cavity length matching is essentially non-Gaussian and described by the L-type probability density distributions (PDDs) with long tails and maxima located near zero. The numerical data were quantitatively confirmed by an experiment for a Raman laser on a barium nitrate crystal operated near the Raman threshold, when the 1st Stokes conversion efficiency did not exceed 0.3 %. A Raman cavity was formed by two flat mirrors providing a double-pass pump configuration. The Raman laser was excited by the linearly polarized frequency-doubled radiation of a Q-switched Nd:YAG laser generating multimode pulses with a duration of 7–8 ns. A Raman laser operating regime characterized by the hyperexponential PDDs with CVs reaching 480 %, which is 2–2.5 times higher than those observed earlier for the single-pass conditions of stimulated Raman scattering, was realized.


1997 ◽  
Vol 484 ◽  
Author(s):  
K. L. Vodopyanov

AbstractInfrared pulses, continuously tunable in the 3–19 μm range, and with up to 1MW peak power, have been achieved using single-stage frequency conversion in a travelling-wave optical parametric generator (OPG) based on ZnGeP2, CdSe and GaSe crystals. The OPG was pumped by 100ps pulses from an actively mode-locked, Q-switched and cavity dumped 2.8 μm Cr,Er:YSGG laser. The quantum conversion efficiency reached 17%.


1996 ◽  
Vol 35 (Part 1, No. 7) ◽  
pp. 3902-3903
Author(s):  
Yukihiro Yamamoto ◽  
Satoshi Yamaguchi ◽  
Noriko Yamada ◽  
Takahiro Matsumoto ◽  
Yukiko Kondo

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