DATA SHEET| JANUARY 29, 2008
1754W 1550 nm DWDM DFB Laser Module
The 1754W laser module is a Dense Wavelength Division Multiplexing
(DWDM) laser for analog wireless applications. It features a distributed-
feedback chip that has been designed specifically for radio frequency
(RF) applications. The 1754W 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 1754W is available in a wide range of standard ITU grid
wavelengths.
Applications
Wideband wireless systems
Satellite signal transmission
via fiber
Narrow transmitter housings
Networks with limited fiber
Architectures using separate
optical wavelengths to carry
targeted services
Available wavelengths
Optical Output Power
Temperature Range
Frequency Range
Input Third Order Intercept
1 dB Compression Point
Adiabatic Chirp (measured at 500 MHz)
Performance Highlights
Min
1527.99
8
-40
5
32
18
40
Typical
-
-
-
-
-
-
-
Max
1562.23
14
+85
2700
-
-
100
Units
nm
mW
°C
MHz
dBm
dBm
MHz/mA
Features
Standard ITU grid wavelengths
Advanced analog chip design
Reduced equipment
requirements in the hub
OC-48 pin out
Telcordia Technologies
compliant
TM
See following pages for complete specifications and conditions.
468
Wide temperature range—
stable even in harsh
environments
For more information on this and other products:
Contact Sales at Ortel 626-293-3400, or visit www.emcore.com.
1754W 1550 nm DWDM DFB Laser Module
DATA SHEET| JANUARY 29, 2008
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
Symbol
T
C
T
STG
-
V
RPD
-
-
I
TEC
Condition
continuous
-
-
-
-
HBM: R = 1500 Ohm, C = 100 pF
continuous
Min
-40
-40
-
-
-
-500
-1.9
Max
+85
+85
150
10
2
500
1.9
Units
°C
°C
mA
V
V
V
A
Electrical/Optical Characteristics
Laser Temperature (T
L
) = 25°C, I
F
= I
OP
, Beginning of Life (BOL)
Parameter
Wavelength
Optical Output Power
Slope Efficiency
Optical Isolation
Sidemode Suppression Ratio
Relative Intensity Noise
Threshold Current
Operating Current
Monitor PD Responsivity
Thermistor Resistance
Thermistor Temp. Coefficient
TEC Current
Fiber Length
Fiber Buffer
Fiber Core / Cladding
RF Characteristics
Laser Temperature (T
L
) = 25°C, I
F
= I
OP
, Beginning of Life (BOL)
Parameter
Symbol
Condition
Frequency Range
F
-
Frequency Response
S21
Any 500 MHz
5-2700 MHz
Input Third Order Intercept
IIP3
-
1 dB Compression point
Nominal Input Impedance
Return Loss – Tested w/
resistive match 50Ω to 25Ω pad
-
Z
IN
| S11 |
-
-
-
Min
5
-
-
32
18
-
16
Typ
-
2
4
-
-
25
-
Max
2700
-
-
-
-
-
-
Units
MHz
dB, p-p
dB, p-p
dBm
dBm
Ohms
dB
Symbol
-
-
η
ISO
SMSR
RIN
I
TH
I
OP
r
PD
R
TH
TC
TH
I
TEC
-
-
-
Condition
ITU Grid
Min
1527.99
8
.14
30
30
-
-
-
10
9.5
-
-1.5
1.0
-
-
Typ
-
-
-
-
-
-
-
-
-
10
-4.4
-
1.5
900
9/125
Max
1562.23
14
-
-
-
-155
30
120
200
10.5
-
1.6
-
-
-
Unit
nm
mW
W/A
dB
dB
dB/Hz
mA
mA
µA/mW
KΩ
%/°C
A
m
µm
µm
I
F
= I
TH
+70mA, T=25°C
5MHz -2700MHz
V
RM
= 5V
T
OP
= 25
°C
T
OP
= 25
°C
-40<T
C
<+85°C; I
F
= 100 mA
May include splice
-
-
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.
ORTEL, A division of EMCORE
1754W 1550 nm DWDM DFB Laser Module
DATA SHEET| JANUARY 29, 2008
Electrical Schematics
Figure 1. 1754W Laser Schematic
Figure 2. 1754W Circuit Schematic
ORTEL, A division of EMCORE
3
1754W 1550 nm DWDM DFB Laser Module
DATA SHEET| JANUARY 29, 2008
Outline Diagram
Dimensions are in inches and (millimeters)
Pin Information
Pin No.
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 (+)
Laser Modulation (-)
Laser Common (+)
NC
ORTEL, A division of EMCORE
4
1754W 1550 nm DWDM DFB Laser Module
DATA SHEET| JANUARY 29, 2008
Laser Safety
This product meets the appropriate standard in Title 21 of the Code of Federal Regulations (CFR). FDA/CDRH
Class IIIb laser product. This device has been classified with the FDA/CDRH under accession number 0220309.
All Versions of this laser are Class 3B laser product, tested according to IEC 60825-1:1993 + A1:1997 +
A2:2001 / EN 60825-1:1994 + A2:2001 + A1:2002
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 IIIb 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.
ORTEL, A division of EMCORE
5
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