DATASHEET| AUGUST 6, 2008
Model 755M Optical Transmitter
DWDM, up to 20 km, Low Distortion, Wideband
Emcore’s Model 755M is a directly modulated (DM) DWDM optical
transmitter specifically designed for wideband applications that require
both CATV and DBS signals to be carried over up to 20 km of fiber. This
facilitates networks designs that may use a single transmitter to carry
multiple signals.
The 755M supports full 79-channel NTSC analog signal and or a
combination of QAM, DBS with reduced channel analog CATV. The
fiber length the 755M can support is up to 20km.
Applications
°Video signal distribution to
HFC CATV and FTTP nodes
The 755M family of transmitter products is designed to support various
CATV transmitter applications with a common platform. A 75Ω CATV RF
video input supports frequencies up to 1002 MHz. Integrated within the
transmitter design are Emcore’s low chirp control, noise suppression
circuitry, and patented predistortion technology to provide outstanding
performance with any of Emcore’s wide range of cooled broadband
lasers. A second 75Ω RF input supports frequencies up to 2600 MHz for
FTTP, L-Band satellite, and wireless applications.
°Supports CATV, QAM, and
1527
DBS signal carriage
°Replacement for externally
modulated transmitters
Features
°Dual redundant power
supplies
Performance Highlights
Min
0
Typ
Max
50
Units
°C
°SNMP network interface
Operating Temperature Range
Wavelength (100 GHz ITU Options)
Optical Power
25
-
°Dual RF inputs for CATV and
DBS
1530
10
1560
-
nm
°Available on 100 GHz spaced
-
dBm
ITU DWDM C-band channels
Frequency Response (75Ω CATV Port)
(75Ω L-Band Port)
47
-
-
1002
2600
MHz
°Optimized RF integration of
predistorter, amplifiers, and
laser
950
CNR
51
-
-
-
-
-
-
dB
°Complete, efficient laser bias
and TEC control circuitry
CSO
-60
-65
-60
dBc
dBc
dBc
CTB
-
°OEM/ODM opportunities
available through Emcore
C/I (3rd order, 950 – 2600 MHz)
-
°RoHS
SBS Suppression Capability
-
-
18
dBm
(Channel Option 11J & 57J only)
Noise and distortion performance above assumes 79 channel NTSC loading with no QAM, 0 dBm
received optical power, 20 km SMF-28 fiber or equivalent. See following pages for complete
specifications and operating/test conditions.
For more information on this and other products:
Contact Sales at Emcore 626-293-3400, or visit www.emcore.com.