The 1754C laser module 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 module 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.
Applications
CATV Broadcast Networks
Networks with Limited Fiber
Architectures Using Separate Optical
Wavelengths to Carry Targeted Services
Performance Highlights
Min
Available Wavelengths
Operating Temperature Range
-40
6 - 16
40
-
-
52
5
16
Optical Output Power
Adiabatic Chirp (measured at 500 MHz)
Composite Second-Order Distortion (CSO)
Composite Triple Beat Distortion (CTB)
Carrier-to-Noise Ratio (CNR)
Frequency Range
RF Return Loss
Typical
See page 3
25
-
-
-
-
-
-
-
Max
+85
-
100
-55
-64
-
2700
-
Units
nm
C
mW
MHz/mA
dBc
dBc
dB
MHz
dB
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
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.
| REV 2013.12
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.
1754C C-Band DWDM DFB Laser Module
DATASHEET | DECEMBER 2013
FIBER OPTICS
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
Operating Temperature Range
Storage Temperature Range
Average RF Input Power
Laser Forward DC Current
Photodiode Reverse Voltage
Laser Reverse Voltage, DC
ESD
TEC Current
Symbol
T
c
T
STG
-
-
V
MPD
-
-
I
TEC
Condition
Continuous
Continuous
60 seconds
Continuous
Continuous
Continuous
HBM: R = 1500 Ohm,
C = 100pF
Continuous
Min
-40
-40
-
-
-
-
-500
-1.5
Max
+85
+85
62
150
10
1
500
1.5
Unit
°C
°C
dBmV
mA
V
V
V
A
Electrical/Optical Characteristics
Laser Temperature (TL) = 25 C, I
F
=I
OP
, Beginning of Life (BOL)
o
Parameter
Operating Case Temperature
Optical Output Power
Threshold Current
Slope Efficiency
Operating Current
Operating Voltage
Wavelength
Drift over T
C
Range
Laser Adiabatic Chirp
Optical Return Loss
Sidemode Suppression Ratio
Optical Isolation
Relative Intensity Noise
Nominal Input Impedance
MPD Responsivity
MPD Dark Current
MPD Current Relative to Output Power
Thermistor Resistance
Thermistor Temp. Coefficient
TEC Voltage
Symbol
T
C
P
O
I
TH
I
OP
V
OP
OP
FM
ORL
SMSR
ISO
RIN
Z
IN
r
PD
I
D
-
R
TH
TC
TH
V
TEC
Condition
-
6 mW version*
8 mW version*
10 mW version
16 mW version
25C, BOL
BOL
25C, BOL
ITU Grid
I
f
= 60 mA, T = T
OP
I
F
= 60 mA, T
OP
= 25C
@ 500 MHz
-
25C
I
F
= I
TH
+ 70 mA
-
V
RM
= 5 V
I
OP
= 0 mA
V
RM
= 5V, T
OP
= 25C
V
RM
= 5V, T
OP
= 25C
T
OP
= 25C
T
OP
= 25C
-
Min
-40
6
8
10
16
-
.07
-
-
-
40
40
30
30
22
10
Typ
25
-
-
-
-
-
-
-
-
See page 3
-
-
-
-
-
-
25
-
Max
+85
7.9
9.9
15.9
19.9
20
-
120
2.5
40
100
-
-
-
-155
27
200
0.2
Unit
C
mW
mA
W/A
mA
V
nm
pm
MHz/mA
dB
dB
dB
dB/Hz
μA/mW
A
mA/W
kΩ
% /
C
V
10
9.5
-
-2.5
-
10
-4.4
-
200
10.5
-
3.8
*For 6 and 8 mW option, lossy splice may be applied.
| REV 2013.12
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.
1754C C-Band DWDM DFB Laser Module
DATASHEET | DECEMBER 2013
FIBER OPTICS
RF Characteristic
Laser Temperature (TL) = 25 C, I
F
=I
OP
, Beginning of Life (BOL)
o
Parameter
Carrier-to-Noise Ratio
(1)
Symbol
CNR
Condition
79 NTSC, 3.3% OMI
1 m fiber min, 4.2 MHz NBW
79 NTSC, 3.3% OMI
1 m fiber min
79 NTSC, 3.3% OMI
1 m fiber min
40 MHz to 890 MHz
I
F
= 60 mA, T
OP
= 25C
5 MHz to 2700 MHz
I
F
= 60 mA, T
OP
= 25C
5 MHz to 2700 MHz
I
F
= 60 mA, T
OP
= 25C
Channel Loading: Frequencies set
at 7, 13, 19, 25, 31, and 37 MHz
Receiver thermal noise 8 pA*Hz
-0.5
Min
52
Typ
-
Max
-
-55
Units
dB
dBm
dBc
dB
p-p
dB
p-p
dB
dB
dBm
dBc
Composite Second-Order
Composite Triple Beat
(1)
(1)
CSO
CTB
-
-
-
-64
1
4
Frequency Response Flatness
|S21|
RF Return Loss
resistive match 50 to 25 pad
Carrier-to-Noise Ratio
(2)
|S11|
CNR
16
51
-
-
-
-
-
-
-
-
-50
-60
Composite Second-Order
Composite Triple Beat
(2)
(2)
CSO
CTB
Photodiode responsivity ~1.1 A/W
Noise Bandwidth 4.2 MHz
(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
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
Wavelength
(nm)
1526.44
1529.22
1527.99
1528.77
1529.55
1530.33
1531.12
1531.90
1532.68
1533.47
1534.25
1535.04
1535.82
1536.61
1537.40
1538.19
1538.98
Channel
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
Wavelength
(nm)
1539.77
1540.56
1541.35
1542.14
1542.94
1543.73
1544.53
1545.32
1546.12
1546.92
1547.72
1548.51
1549.32
1550.12
1550.92
1551.72
1552.52
Channel
30
29
28
27
26
25
24
23
22
21
20
19
18
Wavelength
(nm)
1553.33
1554.13
1554.94
1555.75
1556.56
1557.36
1558.17
1558.98
1559.79
1560.61
1561.42
1562.23
1563.05
| REV 2013.12
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.
1754C C-Band DWDM DFB Laser Module
DATASHEET | DECEMBER 2013
FIBER OPTICS
Electrical Schematics
1
10K
ISOLATOR
NC
14
2
12nH
RF CHOKE
22
13
3
0.01uF
12
100
LD
4
11
5
MPD
10
6
(+)
CASE
GND
9
7
(-)
TEC
8
Figure 1. 1754C Laser Simplified Schematic
Figure 2. 1754C Circuit Schematic
Pin Definitions
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Description
Thermistor
Thermistor
DC Laser Bias (-)
MPD Anode (-)
MPD Cathode (+)
Thermal Electric Cooler (+)
Thermal Electric Cooler (-)
Case Ground
Case Ground
NC
Laser Common (+), Case GND
Laser Modulation (-)
Laser Common (+), Case GND
NC
| REV 2013.12
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.
1754C C-Band DWDM DFB Laser Module
DATASHEET | DECEMBER 2013
FIBER OPTICS
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
| REV 2013.12
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.
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