DATASHEET | APRIL 2012
FIBER OPTICS
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.
Applications
!
#
#
'
%
(
&
$
"
"
The 1754W is available in a wide range of standard ITU grid wavelengths.
Performance Highlights
Min
Available wavelengths
Optical Output Power
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
( )
'
$
,- . /
0 -1.
2
$
'
+
*
+
Temperature Range
Frequency Range
Input Third Order Intercept
1 dB Compression Point
Adiabatic Chirp (measured at 500 MHz)
| REV 2012.04
DATASHEET | APRIL 2012
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 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 (TL) = 25
o
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
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
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
A/mW
K
%/°C
A
m
µm
µm
I
F
= I
TH
+70mA, T=25°C
5MHz -2700MHz
-
-
-
10
9.5
-
-1.5
1.0
-
-
V
RM
= 5V
T
OP
= 25
°C
T
OP
= 25
°C
-40<T
C
<+85°C; I
F
= 100 mA
May include splice
-
-
| REV 2012.04
DATASHEET | APRIL 2012
FIBER OPTICS
RF Characteristic
Laser Temperature (TL) = 25
o
C, I
F
=I
OP
, Beginning of Life (BOL)
Parameter
Frequency Range
Frequency Response
Input Third Order Intercept
1 dB Compression point
Nominal Input Impedance
Return Loss – Tested w/
resistive match 50Ω to 25Ω pad
Symbol
Condition
F
S21
IIP3
-
Z
IN
| S11 |
Min
-
Any 500 MHz
5-2700 MHz
-
-
-
-
Typ
5
-
-
32
18
-
16
Max
-
2
4
-
-
25
-
2700
-
-
-
-
-
-
Units
MHz
dB, p-p
dB, p-p
dBm
dBm
Ohms
dB
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 reflection
Electrical Schematics
Figure 1. 1754W Laser Schematic
Figure 2. 1754W Circuit Schematic
| REV 2012.04
DATASHEET | APRIL 2012
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 2012.04
DATASHEET | APRIL 2012
FIBER OPTICS
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 (+)
Laser Modulation (-)
Laser Common (+)
NC
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
µ
m
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
µ
m
| REV 2012.04
