AGERE CW22P911, CW22P901, CW22P891, CW22P881, CW22P871 Datasheet

Advance Data Sheet, Rev. 1

CW20P-Type
CW Tunable, Wavelength-Stabilized Laser Module

Applications

■

SONET/SDH extended-reach

■

Long-haul, very dense, wave-division multiplexing
(DWDM)

■

High-speed data communication

■

Flexible wavelength systems

Description

June 2001

Offering multiple channel selections and SONET/SDH compat­ibility, the CW20P-Type CW DBR Laser Module is manufac­tured in a 24-pin metallic DIP with a polarization-maintaining
fiber (PMF) pigtail.

Features

■

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 communi­cation

■

High output power, up to 20 mW

■

Low profile, 24-pin package

The CW20P-type laser modules are designed for use
in transmission systems and high-speed data com­munication applications. The device supports
20 wavelengths. The module uses an RS-232 inter­face to adjust various module functions such as
wavelength. In addition, the interface provides acces­sibility to the alarm and monitor outputs.

The modules meet all present

gies

* GR-253-CORE requirements and the ITU-T

Telcordia Technolo-

G.957 and G.958 recommendations. The modules
are also suited for extended distance data and net­working applications when used in conjunction with a
lithium niobate modulator.

The CW20P uses a 1.5 µm distributed Bragg reflec­tor (DBR) laser with an integrated wavelength stabi­lizer. By integrating the wav elength stabilizer with the
DBR laser chip, the device offers a compact, cost­effective solution for low-dispersion transmission.
Devices are provided at wavelengths that are com­patible with the ITU-T wavelength standards at
200 GHz, 100 GHz, and 50 GHz. The package also
contains a thermoelectric cooler, thermistor, back­facet monitor, and optical isolator. The laser module
requires 5 V, –5.2 V, and 3.3 V.

■

Laser bias monitor alarm

■

Module enable/disable input

*

Telcordia Technologies

Inc.

is a trademark of T el cordia Technologies,

CW20P-Type Advance Data Sheet, Rev. 1
CW Tunable, Wavelength-Stabilized Laser Module June 2001

Module Processing

The module can withstand normal wave soldering pro­cesses. The complete transmitter module is not her­metically 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.

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 rugged­ness 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
nical Note (TN95-010LWP).

Cleaning Fiber-Optic Assemb lies

Tech -

Pin Information

Table 1. Pin Descriptions

Pin Number Name

1 Ground (TEC)
2 Back-facet Monitor
3 Bias Monitor/Laser Degrade Alarm1
4 CW Enable
5 NUC

2

6 Ground
7 Wavelength-Deviation Error Alarm
8 RS-232 Interface (Tx)

9 RS-232 Interface (Rx)
10 Dither Input
11 Ground
12 V
13 V
14 V

(TEC supply voltage)

TEC

EE
CC

15 Ground
16 NUC

2

17 Ground
18 NUC

2

19 Ground
20 NUC

2

21 Ground
22 NUC

2

23 Ground
24 V

1. Laser back-facet and bias alarm functions are customer-use
options that are not required for normal operations of the transmit­ter

and are normally used during manufacture and for diagnostics.
The output will optionally be either a logic signal or an analog volt­age. All alarm, select, and enable signals are active-high.

2. NUC = no user connection.

CC

1

22

Agere Systems Inc.