1754C C-Band DWDM DFB Laser Module

1754C C-Band DWDM DFB Laser Module
DATASHEET | FEBRUARY 2015
FIBER OPTICS
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
Performance Highlights
Networks with Limited Fiber
Architectures Using Separate Optical
Wavelengths to Carry Targeted Services
Min
Available Wavelengths
Operating Temperature Range
Optical Output Power
Features
Standard ITU Grid Wavelengths
Adiabatic Chirp (measured at 500 MHz)
Typical
Max
See page 3
Units
nm
+85
°C
-40
25
6 - 16
-
-
mW
40
-
100
MHz/mA
Composite Second-Order Distortion (CSO)
-
-
-55
dBc
Advanced Analog Chip Design
Composite Triple Beat Distortion (CTB)
-
-
-64
dBc
Reduced Equipment Requirements in
the Hub
Carrier-to-Noise Ratio (CNR)
52
-
-
dB
Frequency Range
5
-
2700
MHz
OC-48 Pin Out
RF Return Loss
16
-
-
dB
Telcordia Technologies™ 468 Compliant
Noise and distortion performance above assume 79 channel NTSC loading with no QAM, 0 dBm
Wide Temperature Range – Stable Even
in Harsh Environments
received optical power. See following pages for complete specifications and operating/test conditions.
RoHS Compliant
| REV 2015.02
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
FIBER OPTICS
DATASHEET | FEBRUARY 2015
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
Tc
Continuous
-40
+85
°C
TSTG
Continuous
-40
+85
°C
Average RF Input Power
-
60 seconds
-
62
dBmV
Laser Forward DC Current
-
Continuous
-
150
mA
Operating Temperature Range
Storage Temperature Range
Min
Max
Unit
Photodiode Reverse Voltage
VMPD
Continuous
-
10
V
Laser Reverse Voltage, DC
-
Continuous
-
1
V
ESD
-
HBM: R = 1500 Ohm,
C = 100pF
-500
500
V
ITEC
Continuous
-1.5
1.5
A
TEC Current
Electrical/Optical Characteristics
o
Laser Temperature (TL) = 25 C, IF=IOP, Beginning of Life (BOL)
Parameter
Symbol
Condition
Min
Typ
Max
Unit
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
25°C, BOL
-
-
20
mA
Operating Case Temperature
Slope Efficiency
η
.07
-
-
W/A
Operating Current
IOP
BOL
-
-
120
mA
Operating Voltage
VOP
25°C, BOL
-
-
2.5
λ
ITU Grid
λ Drift over TC Range
ΔλOP
If = 60 mA, T = TOP
-
-
40
pm
Laser Adiabatic Chirp
FM
IF = 60 mA, TOP = 25°C
@ 500 MHz
40
-
100
MHz/mA
ORL
-
Wavelength
Optical Return Loss
Sidemode Suppression Ratio
SMSR
See page 3
V
nm
40
-
-
dB
30
-
-
dB
Optical Isolation
ISO
25°C
Relative Intensity Noise
RIN
IF = ITH + 70 mA
Nominal Input Impedance
ZIN
-
22
25
27
Ω
MPD Responsivity
rPD
VRM = 5 V
10
-
200
μA/mW
MPD Dark Current
ID
IOP = 0 mA
VRM = 5V, TOP = 25°C
0.2
μA
mA/W
MPD Current Relative to Output Power
30
-
-
dB
-
-155
dB/Hz
-
VRM = 5V, TOP = 25°C
10
-
200
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
Thermistor Resistance
*For 6 and 8 mW option, lossy splice may be applied.
| REV 2015.02
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
FIBER OPTICS
DATASHEET | FEBRUARY 2015
RF Characteristic
o
Laser Temperature (TL) = 25 C, IF=IOP, Beginning of Life (BOL)
Parameter
Carrier-to-Noise Ratio
(1)
Composite Second-Order
Composite Triple Beat
(1)
Condition
Min
Typ
Max
Units
CNR
79 NTSC, 3.3% OMI
1 m fiber min, 4.2 MHz NBW
52
-
-
dB
CSO
79 NTSC, 3.3% OMI
1 m fiber min
-55
dBm
-64
dBc
1
dBp-p
4
dBp-p
(1)
CTB
Frequency Response Flatness
|S21|
RF Return Loss
resistive match 50Ω to 25Ω pad
Carrier-to-Noise Ratio
Symbol
(2)
Composite Second-Order
(2)
79 NTSC, 3.3% OMI
1 m fiber min
-
40 MHz to 890 MHz
IF = 60 mA, TOP = 25°C
-
-
5 MHz to 2700 MHz
IF = 60 mA, TOP = 25°C
|S11|
5 MHz to 2700 MHz
IF = 60 mA, TOP = 25°C
16
-
-
dB
CNR
Channel Loading: Frequencies set
at 7, 13, 19, 25, 31, and 37 MHz
51
-
-
dB
-
-
-50
dBm
-
-
-60
dBc
CSO
Receiver thermal noise 8 pA*Hz
-0.5
Photodiode responsivity ~1.1 A/W
Composite Triple Beat
(2)
CTB
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
Wavelength
(nm)
Channel
Wavelength
(nm)
Channel
Wavelength
(nm)
64
1526.44
47
1539.77
30
1553.33
63
1529.22
46
1540.56
29
1554.13
62
1527.99
45
1541.35
28
1554.94
61
1528.77
44
1542.14
27
1555.75
60
1529.55
43
1542.94
26
1556.56
59
1530.33
42
1543.73
25
1557.36
58
1531.12
41
1544.53
24
1558.17
57
1531.90
40
1545.32
23
1558.98
56
1532.68
39
1546.12
22
1559.79
55
1533.47
38
1546.92
21
1560.61
54
1534.25
37
1547.72
20
1561.42
53
1535.04
36
1548.51
19
1562.23
52
1535.82
35
1549.32
18
1563.05
51
1536.61
34
1550.12
50
1537.40
33
1550.92
49
1538.19
32
1551.72
48
1538.98
31
1552.52
| REV 2015.02
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
FIBER OPTICS
DATASHEET | FEBRUARY 2015
Electrical Schematics
1
NC
10K
14
ISOLATOR
13
2
12nH
RF CHOKE
3
0.01uF
22
LD
4
12
100
5
11
10
MPD
6
(+)
9
CASE
GND
7
(-)
TEC
8
Figure 1. 1754C Laser Simplified Schematic
Figure 2. 1754C Circuit Schematic
Pin Definitions
Pin
Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
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 2015.02
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
FIBER OPTICS
DATASHEET | FEBRUARY 2015
Outline Diagram (Dimensions are in inches and millimeters)
Fiber type: 0.9 mm O.D. jacketed single mode 9/125 mm (SMF-28e)
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 2015.02
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
FIBER OPTICS
DATASHEET | FEBRUARY 2015
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 μm.
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.
DANGER
INVISIBLE LASER
AVOID DIRECT
EXPOSURE TO BEAM
RADIATION
Wavelength: 1.3 μm
Max. Output: 50 mW,
Class 1 Laser Product
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 μm
| REV 2015.02
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
FIBER OPTICS
DATASHEET | FEBRUARY 2015
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 = 64: Channel 64, 1526.44 nm
CATV Channel Plan
xx = BB: Broadband
xx = RP: Return Path
Connectors
yy = FC: FC/APC
yy = SC: SC/APC
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.
| REV 2015.02
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.