Group-velocity matched-fiber Raman wavelength converter for the flexible optical communications network

2003 ◽  
Vol 38 (6) ◽  
pp. 504-506
Author(s):  
Ming Tang ◽  
H. Ghafouri-Shiraz
Keyword(s):  
Group Velocity ◽  
Optical Communications ◽  
Wavelength Converter ◽  
Communications Network

Simultaneous tracking and low-data-rate communications with high-speed array detectors for optical communications network management

1990 ◽  
Author(s):  
David L. Clark ◽  
Michael A. Cosgrove ◽  
Ralph C. Short ◽  
Mike Thielk ◽  
Randy C. Van Vranken ◽  
...  
Keyword(s):  
Network Management ◽  
Optical Communications ◽  
High Speed ◽  
Data Rate ◽  
Communications Network ◽  
Array Detectors

Architectural Options for a Future Deep Space Optical Communications Network

2004 ◽  
Author(s):  
B. L. Edwards ◽  
T. Benjamin ◽  
J. Scozzafava ◽  
F. Khatri ◽  
J. Sharma ◽  
...  
Keyword(s):  
Optical Communications ◽  
Deep Space ◽  
Communications Network

Interferometric (Fourier-Spectroscopic) Measurement of Electron Energy Distributions

1990 ◽  
Vol 48 (2) ◽  
pp. 110-111 ◽  
Author(s):  
F. Hasselbach ◽  
A. Schäfer
Keyword(s):  
Group Velocity ◽  
Wave Packets ◽  
Index Of Refraction ◽  
Electron Wave ◽  
Fringe Contrast ◽  
Faraday Cage ◽  
Optical Index ◽  
Wien Filter ◽  
Coherent Wave ◽  
Electric And Magnetic Fields

Möllenstedt and Wohland proposed in 1980 two methods for measuring the coherence lengths of electron wave packets interferometrically by observing interference fringe contrast in dependence on the longitudinal shift of the wave packets. In both cases an electron beam is split by an electron optical biprism into two coherent wave packets, and subsequently both packets travel part of their way to the interference plane in regions of different electric potential, either in a Faraday cage (Fig. 1a) or in a Wien filter (crossed electric and magnetic fields, Fig. 1b). In the Faraday cage the phase and group velocity of the upper beam (Fig.1a) is retarded or accelerated according to the cage potential. In the Wien filter the group velocity of both beams varies with its excitation while the phase velocity remains unchanged. The phase of the electron wave is not affected at all in the compensated state of the Wien filter since the electron optical index of refraction in this state equals 1 inside and outside of the Wien filter.

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