DATA SHEET | FEBRUARY 2006
2100 Series 1550 nm Externally Modulated Transmitter
Applications
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High performance supertrunking links
High power distribution networks
Redundant ring architectures
FTTx networks
Features
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Single or Dual Optical Outputs
Ortel’s DEMT/SEMT/HEMT/FEMT 2100 series product line is a family of state-of-the-
art high performance 1550 nm externally modulated CATV fiber optic transmitters.
Packaged in a convenient 1U 19” rack housing, this line of transmitters couples high
optical output powers, up to 11.0 dBm, with low optical linewidth resulting in
unmatched performance. The characteristics of the Ortel transmitter design exhibit
high CNR when coupled with one or more EDFAs over 100km, or used stand alone
up to 80km. The optical modulator, combined with the proprietary predistortion circuit,
provides superior CTB and CSO performance with SBS suppression levels of greater
than 19 dBm. Newly introduced features such as built in field adjustable SBS control
and electronic dispersion compensation allow these transmitters to be quickly
optimized in the field for any link or application without the need to procure
specifically tuned transmitters. This affords the system designer a level of flexibility
previously unknown in the CATV market place. All of these characteristics together
provide a line of high quality; industry-leading transmitters that have the versatility
needed to support HFC networks far into the 21st century.
Front Panel RF Test Point
RS232 Control Interface
Electro-Fluorescence Status Display
OMI / RF Gain Adjustment
AGC Select: CW, Video, Manual
(No AGC)
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Industry Leading Field Adjustable SBS
Suppression
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Field Adjustable Electronic Dispersion
Compensation (EDC)
The DEMT series transmitters are designed to be employed as a low cost, high
performance solution for applications where the required fiber length is in the range
of 20 to 50 kilometers. Advanced, high power, DFB laser technology allows these
transmitters to be fielded without the use of expensive and performance degrading
EDFAs. This unique externally modulated transmitter technology allows the DEMT
series of transmitters to be used in many novel HFC applications and architectures.
The SEMT series transmitters are designed to be the most versatile model within the
2100 series family of 1550nm externally modulated transmitters. They can easily be
configured to meet most HFC network solutions requiring link lengths in the range of
50 to 70 kilometers with one EDFA as well as links utilizing multiple EDFA’s. In
addition, they will perform optimally in systems that require multiple optical splits and
fiber branching incorporating unequal fiber lengths.
The HEMT series transmitters are high performance, 1550nm externally modulated
transmitters optimized for single EDFA fiber links in the 70 to 90 kilometer range.
These transmitters take advantage of the 2100 series advanced fiber dispersion
compensation circuitry to provide exceptional CATV performance. The HEMT series
of transmitters provide a cost efficient, transport solution for medium to long
distances
The FEMT series transmitters are intended for use in FTTx architecture designs
requiring high quality transmission over varying transmission lengths and EDFA
output powers. These transmitters successfully support very high optical launch
powers while controlling the detrimental effects of Stimulated Brillouin Scattering
(SBS), group velocity dispersion (GVD), and self phase modulation (SPM) that
normally limit performance in conventional externally modulated products.
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For more information on this and other products:
Contact Sales at Ortel 626-293-3400, or visit www.ortel.com.
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