Electronics & Communication
Technologies
- Dispersion Compensated Broad Band Optical Communication
Link
Introduction
The phenomenal growth of Internet traffic has led to
an explosive growth in demand for Bandwidth (BW) and
this in turn has led to the need for higher bit transmission
rates, longer distances and scalability. At present
the key for increasing transmission carrying capacity
of an optical fibre lies in employing Dense Wavelength
Division Multiplexed) DWDM transmission by transmitting
signal using multiple wave lengths offered by optical
fiber amplifiers like Erbium Doped Fibre Amplifiers(EDFA)
and Thulium Doped Fibre Amplifiers (TDFA). Such transmission
has limitations namely chromatic dispersion and nonlinear
effects. These are overcome by designing a dispersion
compensated broadband fibre optical communication link
with a relatively large mode effective area (Aeff) that
can reduce sensitivity to nonlinear optical effects.
Salient features:
Average dispersion of the link is substantially reduced
compared to that of signal transmission fibre alone;
· DCF has mode effective area (A base(eff)) of
at least 40 µm (power 2) at the center wave length
of a given amplifier band (and greater than 30 µm
(power 2) across the overall amplifier band), which
is larger than the presently used DCF; · Reduced
sensitivity to detrimental nonlinear effects; ·
Bend loss < 0.1 dB for a single turn of bend diameter
of 32 mm for all operating wavelength ranges and within
the operating limits; · Mode spot-sizes attained
for these fibres are greater than that of the presently
used DCF thereby ensuring relatively smaller splice-losses
of these DCF's with signal transmission fibers; ·
Improved performance of the system carrying broadband
dispersion compensated links.
Prospective Users: Internet
Service Providers, Telecommunication industries
Type of Technology: Device
Keywords: Fibre, Optic,
Bandwidth, Wavelength
Developed by : Prof. Thyagarajan/
Dr. K D Pande Department: Physics
Contact:
Managing Director
Foundation for Innovation and Technology Transfer (FITT)
Indian Institute of Technology, Delhi
Hauz Khas, New Delhi-110016, INDIA
Tel : 91-011-26597167, 26857762, 26581013, 26597153
Fax : 91-011-26851169
E-mail : drkdpn@gmail.com
