DATASHEET | JANUARY 2013 FIBER OPTICS
| REV 2013.01
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
Applications
CATV Broadcast Networks
Networks with Limited Fiber
Archtectures Using Separate Optical
Wavelengths to Carry Targeted Services
Features
Standard ITU Grid Wavelengths
Advanced Analog Chip Design
Reduced Equipment Requirements in
the Hub
OC-48 Pin Out
Telcordia Technologies™ 468 Compliant
Wide Temperature Range – Stable Even
in Harsh Environments
RoHS Compliant
The 1754C laser component is a Dense Wavelength Division Multiplexing
(DWDM) laser for analog CATV applications. It features a distributed-feedback
(DFB) device that has been designed specifically for radio frequency (RF) and
CATV applications. The 1754C laser component has a wide temperature range for
reliable performance in harsh node environments and narrow transmitter designs.
It also features low adiabatic chirp to maximize signal quality in short and long
lengths of fiber. The laser’s excellent inherent linearity minimizes degradation of
the broadcast signals caused by quadrature amplitude modulated (QAM)
channels.
The 1754C is available in all C-band ITU grid wavelengths.
Performance Highlights
Min Typical Max Units
Available Wavelengths See page 3 nm
Operating Temperature Range -40 25 +85 C
Optical Output Power 6 - 16 - - mW
Adiabatic Chirp (measured at 500 MHz) 40 - 100 MHz/mA
Composite Second-Order Distortion ( CSO ) - - -55 dBc
Composite Triple Beat Distortion ( CTB ) - - -64 dBc
Carrier-to-Noise Ratio ( CNR ) 52 - - dB
Frequency Range 5 - 2700 MHz
RF Return Loss 16 - - dB
Noise and distortion performance above assume 79 channel NTSC loading with
no QAM, 0 dBm received optical power. See following pages for complete
specifications and operating/test conditions.
1754C C-Band DWDM DFB Laser Component
DATASHEET | JANUARY 2013 FIBER OPTICS
| REV 2013.01
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress
ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the
operational sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect
device reliability.
Parameter Symbol Condition Min Max Unit
Operating Temperature Range Tc Continuous -40 +85 °C
Storage Temperature Range TSTG Continuous -40 +85 °C
Average RF Input Power - 60 seconds - 62 dBmV
Laser Forward DC Current - Continuous - 150 mA
Photodiode Reverse Voltage VMPD Continuous - 10 V
Laser Reverse Voltage, DC - Continuous - 1 V
ESD - HBM: R = 1500 Ohm,
C = 100pF -500 500 V
TEC Current ITEC Continuous -1.5 1.5 A
Electrical/Optical Characteristics
Laser Temperature (TL) = 25oC, IF=IOP, Beginning of Life (BOL)
Parameter Symbol Condition Min Typ Max Unit
Operating Case Temperature TC - -40 25 +85
C
Optical Output Power PO
6 mW version
8 mW version
10 mW version
16 mW version
6
8
10
16
-
-
-
-
7.9
9.9
15.9
19.9
mW
Threshold Current ITH 25C, BOL - - 20 mA
Slope Efficiency .07 - - W/A
Operating Current IOP BOL - - 120 mA
Operating Voltage VOP 25C, BOL - - 2.5 V
Wavelength ITU Grid See page 3 nm
Drift over TC Range OP If = 60 mA, T = TOP - - 40 pm
Laser Adiabatic Chirp FM IF = 60 mA, TOP = 25C
@ 500 MHz 40 - 100 MHz/mA
Optical Return Loss ORL - 40 - - dB
Sidemode Suppression Ratio SMSR 30 - - dB
Optical Isolation ISO 25C 30 - - dB
Relative Intensity Noise RIN IF = ITH + 70 mA - -155 dB/Hz
Nominal Input Impedance ZIN - 22 25 27
MPD Responsivity rPD V
RM = 5V 10 - 200 μA/mW
MPD Dark Current ID IOP = 0 mA
VRM = 5V, TOP = 25C 0.2 A
MPD Current Relative to Output Power - VRM = 5V, TOP = 25C 10 - 200 mA/W
Thermistor Resistance RTH TOP = 25 C 9.5 10 10.5 kΩ
Thermistor Temp. Coefficient TCTH TOP = 25 C - -4.4 - %/C
TEC Voltage VTEC - -2.5 - 3.8 V
1754C C-Band DWDM DFB Laser Component
DATASHEET | JANUARY 2013 FIBER OPTICS
| REV 2013.01
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
RF Characteristic
Laser Temperature (TL) = 25oC, IF=IOP, Beginning of Life (BOL)
Parameter Symbol Condition Min Typ Max Units
Carrier-to-Noise Ratio (1) CNR
79 NTSC, 3.3% OMI
1 m fiber min, 4.2 MHz NBW 52 - - dB
Composite Second-Order(1) CSO 79 NTSC, 3.3% OMI
1 m fiber min -55 dBm
Composite Triple Beat(1)
CTB
79 NTSC, 3.3% OMI
1 m fiber min - -64 dBc
40 MHz to 890 MHz
IF = 60 mA, TOP = 25C - - 1 dBp-p
Frequency Response Flatness |S21|
5 MHz to 2700 MHz
IF = 60 mA, TOP = 25C 4 dBp-p
RF Return Loss
resistive match 50 to 25 pad |S11| 5 MHz to 2700 MHz
IF = 60 mA, TOP = 25C 16 - - dB
Carrier-to-Noise Ratio(2) CNR 51 - - dB
Composite Second-Order(2) CSO - - -50 dBm
Composite Triple Beat(2) CTB
Channel Loading: Frequencies set
at 7, 13, 19, 25, 31, and 37 MHz
Receiver thermal noise 8 pA*Hz-0.5
Photodiode responsivity ~1.1 A/W
Noise Bandwidth 4.2 MHz - - -60 dBc
(1). Broadband Forward Path
(2). Return Path. Guaranteed by design, not to test in production.
In order to prevent reflection-induced distortion, the laser must be connected to an optical cable having a return loss of at
least 55 dB for discrete reflections and 30 dB for distributed reflections.
ITU Grid Channel Numbering
Channel Wavelength
(nm)
Channel Wavelength
(nm)
Channel Wavelength
(nm)
62 1527.99 47 1539.77 32 1551.72
61 1528.77 46 1540.56 31 1552.52
60 1529.55 45 1541.35 30 1553.33
59 1530.33 44 1542.14 29 1554.13
58 1531.12 43 1542.94 28 1554.94
57 1531.90 42 1543.73 27 1555.75
56 1532.68 41 1544.53 26 1556.56
55 1533.47 40 1545.32 25 1557.36
54 1534.25 39 1546.12 24 1558.17
53 1535.04 38 1546.92 23 1558.98
52 1535.82 37 1547.72 22 1559.79
51 1536.61 36 1548.51 21 1560.61
50 1537.40 35 1549.32 20 1561.42
49 1538.19 34 1550.12 19 1562.23
48 1538.98 33 1550.92 18 1563.05
1754C C-Band DWDM DFB Laser Component
DATASHEET | JANUARY 2013 FIBER OPTICS
| REV 2013.01
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
Electrical Schematics
Pin Definitions
Pin Description
1 Thermistor
2 Thermistor
3 Dc Laser Bias (-)
4 MPD Anode (-)
5 MPD Cathode (+)
6 Thermal Electric Cooler (+)
7 Thermal Electric Cooler (-)
8 Case Ground
9 Case Ground
10 NC
11 Laser Common (+), Case GND
12 Laser Modulation (-)
13 Laser Common (+), Case GND
14 NC
Figure 2. 1754C Circuit Schematic
1754C C-Band DWDM DFB Laser Component
Figure 1. 1754C Laser Simplified Schematic
1
2
3
4
5
6
7 8
9
10
11
12
13
14
ISOLATOR
CASE
GND
10K
100
22
12nH
RF CHOKE
0.01uF
MPD
LD
NC
(+)
TEC
(-)
DATASHEET | JANUARY 2013 FIBER OPTICS
| REV 2013.01
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
Outline Diagram (Dimensions are in inches and millimeters)
Fiber type: 0.9 mm O.D. jacketed single mode 9/125 mm (SMF-28)
Fiber length: 130 cm + 10 cm, measured as shown below
Nominal pin lead length: 0.2 inch (from external package wall)
130 + 10 cm
Conn
130 + 10 cm
Conn
1754C C-Band DWDM DFB Laser Component
DATASHEET | JANUARY 2013 FIBER OPTICS
| REV 2013.01
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
Laser Safety
This product meets the appropriate standard in Title 21 of the Code of Federal Regulations (CFR). FDA/CDRH Class 1 laser
product. This device has been classified with the FDA/CDRH under accession number 0220309.
All Versions of this laser are Class 1 laser product, tested according to IEC 60825-1:2007/EN 60825-1:2007
Single-mode fiber pigtail with SC/APC connectors (standard).
Wavelength = 1.5 m.
Maximum power = 30 mW.
Because of size constraints, laser safety labeling (including an FDA class 1 label) is not affixed to the module, but attached
to the outside of the shipping carton.
Product is not shipped with power supply.
Caution: Use of controls, adjustments and procedures other than those specified herein may result in hazardous
laser radiation exposure.
1754C C-Band DWDM DFB Laser Component
DANGER
INVISIBLE LASER RADIATION
IS EMITTED FROM THE END
OF FIBER OR CONNECTOR
Avoid direct exposure to beam
Do not view beam directly with
optical instruments
INVISIBLE LASER RADIATION EMITTED FROM END OF FIBER OR CONNECTOR
Avoid exposure to beam
Class 1 Laser Product IEC-60825-1:20007 Max. Output:50 mw Wavelength: 1.3
m
DANGER
INVISIBLE LASER
RADIATION
Max. Output: 50 mW,
Class 1 Laser Product
AVOID DIRECT EXPOSURE TO BEAM
Wavelength: 1.3
m
DATASHEET | JANUARY 2013 FIBER OPTICS
| REV 2013.01
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
Ordering Code Definitions
1754C – ww - xx – yy – zz
Family Name
Analog 1550 nm, DFB, Laser
ITU Channel Wavelengths
ww = 18: Channel 18, 1563.05 nm
ww = 19: Channel 19, 1562.23 nm
…..
ww = 62: Channel 62, 1527.99 nm
CATV Channel Plan
xx = BB: Broadband
xx = RP: Return Path
Connectors
yy = FC: FC/APC
yy = SC: SC/APC
1754C C-Band DWDM DFB Laser Component
Minimum Optical Power
zz = 06: 6 mW
zz = 08: 8 mW
zz = 10: 10 mW
zz = 16: 16 mW
Example
1754C-32-BB-SC-08: 1754C, ITU channel 32, 1551.72 nm, SC/APC connector, 8 mW minimum optical power.
