1751A 1550 nm DWDM DFB Laser Module

1751A 1550 nm DWDM DFB Laser Module
DATASHEET | APRIL 2014
FIBER OPTICS
The 1751A laser module is a Dense Wavelength-Division Multiplexing (DWDM)
laser for analog applications. It features a distributed feedback chip that has been
designed specifically for Radio Frequency (RF) applications. The 1751A 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 versatile 1751A laser
module reduces cable network architecture fiber needs and lessens equipment
reqirements in the hub.
Applications
Node Capability
Narrow Transmitter Housing
Networks with Limited Fiber
The 1751A is available in a wide range of standard ITU wavelengths. The lasers
are offered as either forward-path (40 MHz-1 GHz) or return-path (5 MHz-210
MHz) modules.
Architectures Using Separate Optical
Wavelengths to Carry Targeted Services
Performance Highlights
Features
Standard ITU Grid Wavelengths
Advanced Analog Chip Design
Reduces Equipment Requirements in
the Hub
Telcordia Technologies® 468 Compliant
Wide Temperature Range – Stable Even
in Harsh Environments
Parameters
Min
Typical
Max
Units
Available Wavelengths (ITU Grid)
1526
-
1563
nm
Optical Output Power (multiple versions)
6-16
-
-
mW
Temperature Case Temperature Range
-40
-
+85
C
Return Path
5
-
210
MHz
Forward Path
40 MHz
-
1
GHz
Composite Second Order
50
-
-
dBc
Composite Triple Beat
60
-
-
dBc
Adiabatic Chirp (measured at 500 MHz)
40
-
100
MHz/mA
Frequency Range:
| REV 2014.04
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.
1751A 1550 nm DWDM DFB Laser Module
FIBER OPTICS
DATASHEET | APRIL 2014
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 Case Temperature
Storage Temperature
Laser Forward dc Current
Reverse Voltage Photodiode
Laser Reverse Voltage, dc
ESD
TEC Current
RF Input Power
Symbol
Condition
Min
Max
Units
TC
continuous
-40
+85
C
TSTG
-
-40
+85
C
-
-
-
150
mA
VRPD
-
-
10
V
VR
-
-
1
V
-
HBM: R = 1500 Ohm, C = 100 pF
-500
500
V
ITEC
continuous
-1.7
1.7
A
PRFIN
IF = IOP
-
62
dBmV
Electrical/Optical Characteristics
Laser Temperature (TL) = 25oC, IF=IOP, Beginning of Life (BOL)
Parameter
Wavelength
Symbol
Condition
Min
Typ
Max
Unit
λOP
IF = IOP, T = TOP
1526.0
-
1563.1
nm
1751xxxx-06 version
-08 version
-10 version
-16 version
Points measure @
IF = ITH + 20 mA & IF = ITH + 60 mA
6
8
10
16
-
-
mW
mW
mW
mW
0.16
0.19
-
mW/mA
1
Optical Output Power
PO
Slope Efficiency
SE
Optical Isolation
ISO
30
-
-
dB
Sidemode Suppression Ratio
SMSR
35
-
-
dB
Laser Relative Intensity Noise
RIN
-
<-155
-
dB/Hz
-
-
0.04
nm
IF = ITH + 70 mA,
T = 25 C
IF = 60 mA, T = TOP,
Tc varied from minmax
Wavelength Drift as Case Temp. is
Changed

Threshold Current
ITH
-
-
20
mA
Operating Current
IOP
-
-
120
mA
Monitor PD Responsivity
rPD
VRM=5V
10
-
200
μA/mW
Thermistor Resistance
RTH
TOP=25 C
9.5
10
10.5
KΩ
Thermistor Temperature
Coefficient
TCTH
TOP=25 C
-
-4.4
-
%/C
TEC Current
ITEC
-40<TC<+85C
IF = 100 mA
-1.5
-
1.6
A
Fiber Length
-
May include splice
1.0
1.5
-
m
Fiber Buffer
-
-
-
900
-
m
Fiber Core / Cladding
-
-
-
9/125
-
m
1. Measured Wavelength = Operating wavelength with a tolerance of ± 0.05 nm.
| REV 2014.04
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.
1751A 1550 nm DWDM DFB Laser Module
FIBER OPTICS
DATASHEET | APRIL 2014
RF Characteristic
Parameter
Symbol
Condition
Min
Typ
Max
Units
F
IF = 60 mA
5
40 MHz
-
210
1
MHz
GHz
-
IF = 60 mA,
TOP = 25 C
-
±0.5
±0.5
-
dB
dB
-
16
-
-
dB
50
-
-
dBc
60
-
-
dBc
51
-
-
dB
1
Frequency Range
Return Path
Forward Path
1
Frequency Response
Return Path Version 5-210 MHz
Forward Path Version 40- 860 MHz
RF Return Loss
1
| S11 |
Composite Second Order
CSO
Composite Triple Beat
CTB
Carrier to Noise Ratio
CNR
Adiabatic Chirp
FM
Nominal Input Impedance
ZIN
IF = IOP
Note 2, 3, 4 and 5
IF = IOP
Note 2, 3, 4 and 5
IF = IOP
Note 2, 3, 4 and 5
IF = 60 mA, T = 25 C,
measured at 500 MHz
-
40
-
100
MHz/m
A
-
25
-
dB
1. Measured on a 50 resistively matched system.
2. I OP is the bias point at which simultaneously the linearity, the min. optical power and the required operating wavelength,
OP are obtained.
3. 8 channel loading with 10% OMI and 40 km fiber length.
4. Receiver thermal noise 8 pA*Hz-0.5, 0.5 mA at Ith+40 mA, photodiode responsivity ~1.1 A/W, noise bandwidth 4.2 MHz
5. Forward band (FB=45-870 MHz): Eight channel CW measurement: channel frequencies set at 553.25, 559.25, 565.25,
571.25, 577.25, 583.25, 589.25, and 595.25 MHz. CTB measured at 553.25, 577.25, and 595.25 MHz. CSO measured at
42 MHz
6. Measured Wavelength = Operating wavelength with a tolerance of + 0.05 nm.
Electrical Schematics
Figure 1. 1751A Laser Schematic
Figure 2. Suggested Matching Circuit for 1751A
| REV 2014.04
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.
1751A 1550 nm DWDM DFB Laser Module
FIBER OPTICS
DATASHEET | APRIL 2014
Outline Diagrams (Dimensions are in inches and millimeters)
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 2014.04
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.
1751A 1550 nm DWDM DFB Laser Module
DATASHEET | APRIL 2014
FIBER OPTICS
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 0220191.
All Versions of this laser are Class 3B 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.
| REV 2014.04
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.
1751A 1550 nm DWDM DFB Laser Module
FIBER OPTICS
DATASHEET | APRIL 2014
Ordering Code Definitions
1751-19-BB-SC-10
Family name
1751A, Analog 1550 nm, DFB, DWDM
ITU Wavelength
19 = ch.19
20 = ch.20
22 = ch.22
23 = ch.23
25 = ch.25
26 = ch.26
28 = ch.28
29= ch.29
31 = ch.31
32 = ch.32
34 = ch.34
35 = ch.35
37 = ch.37
38 = ch.38
40 = ch.40
41 = ch.41
43 = ch.43
44 = ch.44
46 = ch.46
47 = ch.47
49 = ch.49
50 = ch.50
52 = ch.52
53 = ch.53
55 = ch.55
56 = ch.56
58 = ch.58
59 = ch.59
61 = ch.61
62 = ch.62
64 = ch.64
21 = ch.21
24 = ch.24
27 = ch.27
30 = ch.30
33 = ch.33
36 = ch.36
39 = ch.39
42 = ch.42
45 = ch.45
48 = ch.48
51 = ch.51
54 = ch.54
57 = ch.57
60 = ch.60
63 = ch.63
Frequency Plan
BB = Both Forward and Return
Connectors
FC = FC/APC
SC = SC/APC
PG = None (no connector)
Optical Power min.
06 = 6 mW
08 = 8 mW
10 = 10 mW
16 = 16 mW
| REV 2014.04
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.