Advance Data Sheet, Rev. 1
June 2001
CW20P-Type
CW Tunable, Wavelength-Stabilized Laser Module
Applications
s
s
SONET/SDH extended-reach
Long-haul, very dense, wave-division multiplexing
(DWDM)
High-speed data communication
Flexible wavelength systems
s
s
Description
The CW20P-type laser modules are designed for use
in transmission systems and high-speed data com-
munication applications. The device supports
20 wavelengths. The module uses an RS-232 inter-
face to adjust various module functions such as
wavelength. In addition, the interface provides acces-
sibility to the alarm and monitor outputs.
The modules meet all present
Telcordia Technolo-
gies*
GR-253-CORE requirements and the ITU-T
G.957 and G.958 recommendations. The modules
are also suited for extended distance data and net-
working applications when used in conjunction with a
lithium niobate modulator.
The CW20P uses a 1.5
µm
distributed Bragg reflec-
tor (DBR) laser with an integrated wavelength stabi-
lizer. By integrating the wavelength stabilizer with the
DBR laser chip, the device offers a compact, cost-
effective solution for low-dispersion transmission.
Devices are provided at wavelengths that are com-
patible with the ITU-T wavelength standards at
200 GHz, 100 GHz, and 50 GHz. The package also
contains a thermoelectric cooler, thermistor, back-
facet monitor, and optical isolator. The laser module
requires 5 V, –5.2 V, and 3.3 V.
Offering multiple channel selections and SONET/SDH compat-
ibility, the CW20P-Type CW DBR Laser Module is manufac-
tured in a 24-pin metallic DIP with a polarization-maintaining
fiber (PMF) pigtail.
Features
s
s
s
Tunable up to twenty ITU-T 50 GHz channels
For use with lithium niobate modulators
Integrated Etalon stabilizer
—Replaces external wavelength lockers
1528.77 nm to 1610.0 nm wavelengths
Compact design
Remote programmability
Asynchronous serial interface for module communi-
cation
High output power, up to 20 mW
Low profile, 24-pin package
Laser bias monitor alarm
Module enable/disable input
s
s
s
s
s
s
s
s
*
Telcordia Technologies
is a trademark of Telcordia Technologies,
Inc.
CW20P-Type
CW Tunable, Wavelength-Stabilized Laser Module
Advance Data Sheet, Rev. 1
June 2001
Module Processing
The module can withstand normal wave soldering pro-
cesses. The complete transmitter module is not her-
metically sealed; therefore, it should not be immersed
in or sprayed with any cleaning solution or solvents.
The process cap and fiber pigtail jacket can deform at
temperatures greater than 85 °C. The transmitter pins
can be wave-soldered at a maximum temperature of
250 °C for 10 seconds.
Pin Information
Table 1. Pin Descriptions
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Name
Ground (TEC)
Back-facet Monitor
1
Bias Monitor/Laser Degrade Alarm
1
CW Enable
NUC
2
Ground
Wavelength-Deviation Error Alarm
RS-232 Interface (Tx)
RS-232 Interface (Rx)
Dither Input
Ground
V
EE
V
CC
V
TEC
(TEC supply voltage)
Ground
NUC
2
Ground
NUC
2
Ground
NUC
2
Ground
NUC
2
Ground
V
CC
Connector Options
The standard fiber-optic pigtail is an 8
µm
core PMF
panda-type fiber. (914
µm)
diameter, tight-buffered
outer jacket. The standard length is 39 in. ± 4 in.
(1 m ± 10 cm) and is terminated with an
ST
®
optical
connector.
Installation Considerations
Although the module has been designed with rugged-
ness in mind, care should be used during handling.
The optical connector should be kept free from dust,
and the process cap should be kept in place as a dust
cover when the device is not connected to a cable. If
contamination is present on the optical connector, the
use of canned air with an extension tube should
remove any debris. Other cleaning procedures are
identified in the
Cleaning Fiber-Optic Assemblies
Tech-
nical Note (TN95-010LWP).
1. Laser back-facet and bias alarm functions are customer-use
options that are not required for normal operations of the transmit-
ter and are normally used during manufacture and for diagnostics.
The output will optionally be either a logic signal or an analog volt-
age. All alarm, select, and enable signals are active-high.
2. NUC = no user connection.
2
Agere Systems Inc.
Advance Data Sheet, Rev. 1
June 2001
CW20P-Type
CW Tunable, Wavelength-Stabilized Laser Module
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Parameter
Supply Voltage (positive)
Supply Voltage (negative)
Operating Case Temperature Range
Storage Case Temperature Range
Lead Soldering Temperature/Time
Relative Humidity (noncondensing)
Minimum Fiber-Bend Radius
Symbol
V
CC
V
EE
T
C
T
stg
—
RH
—
Min
—
—
0
–40
—
—
1.5 (38.1)
Max
5.5
–6.0
70
85
250/10
85
—
Unit
V
V
°C
°C
°C/s
%
in. (mm)
Characteristics
(Minimum and maximum values specified over operating case temperature range at 50% duty cycle data signal.
Typical values are measured at room temperature unless otherwise noted.)
Table 2. Electrical Characteristics
Parameter
dc Power Supply Voltage
dc Power Supply Current
dc Negative Supply Voltage
dc Negative Supply Current
Power Dissipation
Module Disable Voltage (TTL) V
IH
Module Enable Voltage (TTL) V
IL
λ
Deviation Alarm:
Levels (CMOS) V
OL
Levels (CMOS) V
OH
Setting
Laser Degrade Alarm:
Levels (CMOS) V
OH
Levels (CMOS) V
OL
Setting
TEC Current
TEC Voltage
Symbol
V
CC
I
CC
V
EE
I
EE
P
DISS
V
DIS
V
EN
V
λALARM
N
V
λALARM
λ
ALARM
V
ALARM
V
λALARM
N
LD
ALARM
I
TEC
V
TEC
Min
4.75
—
–5.46
—
—
4.2
0.0
0
4.05
–20
4.05
0
—
—
3.2
Typ
5.0
350
–5.2
—
10
—
—
—
—
—
—
—
—
1
3.3
Max
5.25
500
–4.94
250
—
—
0.8
0.6
—
20
—
0.6
I
BOL
x 125%
2
3.5
Unit
V
mA
V
mA
W
V
V
V
V
pm
V
V
mA
A
V
Agere Systems Inc.
3
CW20P-Type
CW Tunable, Wavelength-Stabilized Laser Module
Advance Data Sheet, Rev. 1
June 2001
Characteristics
(continued)
Table 3. Optical Characteristics
Parameter
Average Optical-Fiber Power Output (BOL)
1
Output Power Variation (BOL)
Frequency Drift
Center Wavelength Range (See Table 6.)
Side-mode Suppression Ratio
2
Symbol
P
F
∆P
∆λ
C
λ
C
SMSR
Min
13.0
–0.5
–2.5
1528.77
32
Typ
—
—
—
—
—
Max
—
0.5
2.5
1610.53
—
Unit
dBm
dB
GHz
nm
dB
1. Output power definitions and measurement per ITU-T Recommendation G.957.
2. Ratio of the average output power in the dominant longitudinal mode to the power in the most significant side mode under fully
modulated conditions.
Qualification and Reliability
To help ensure high product reliability and customer satisfaction, Agere Systems is committed to an intensive qual-
ity program that starts in the design phase and proceeds through the manufacturing process. Optoelectronics mod-
ules are qualified to Agere Systems internal standards using MIL-STD-883 test methods and procedures and using
sampling techniques consistent with
Telcordia Technologies
requirements. This qualification program fully meets
the intent of
Telcordia
reliability practices TR-NWT-000468 and TA-TSY-000983. In addition, the Agere Systems
design, development, and manufacturing facility has been certified to be in full compliance with the latest
ISO
*
9001 Quality System Standards.
Laser Safety Information
Class IIIb Laser Product
All versions of the CW20P-type modules are classified as Class IIIb laser products per FDA/CDRH, 21 CFR 1040
Laser Safety requirements. The device will be classified with the FDA under an accession number to be deter-
mined.
This product complies with 21 CFR 1040.10 and 1040.11.
8
µm/125 µm
diameter single-mode fiber pigtail with 914
µm
tight-buffered jacket and connector.
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 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 IIIb Laser Product FDA/CDRH, 21 CFR 1040 Max. Output: 40 mW
Wavelength: 1.5
µm
*
ISO
is a registered trademark of The International Organization for Standardization.
4
Agere Systems Inc.
Advance Data Sheet, Rev. 1
June 2001
CW20P-Type
CW Tunable, Wavelength-Stabilized Laser Module
Outline Drawings
Dimensions are in inches and (millimeters).
2.89
(73.4)
2.008
(51.00)
(TOP VIEW)
0.50
(12.70)
0.012
(0.3)
STANDOFF
HEIGHT
0.018
(0.46)
DIA
0.100
(2.54)
1.100
(27.94)
1.075
(27.31)
0.085
(2.16)
(SIDE VIEW)
PIN 13
1.025
(26.04)
STANDOFF
(TYP. 4 PLCS)
0.39
(10.00)
MAX
39.37
(1000)
PIN 24
3.50
(8.89)
1.5
(38.1)
0.28
(7.00)
MAX
PIN 1
PIN 12
0.236
(5.99)
0.236
(5.99)
4 x
∅
0.106 (2.69) THRU
(BOTTOM VIEW)
1-1263 (F)
Agere Systems Inc.
5
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