AGERE D374-02A, D374-10F, D374-10A, D374-02N, D374-02F Datasheet

Data Sheet

December 2000

D374-Type Digital Uncooled 2.5 Gbits/s
Laser Module

Applications

■

Short-reach SONET OC-48 systems

■

SDH STM-16 systems

■

Telecommunications

■

Secure digital data systems

The low-profile D374-Type Laser Module is ideally suited for
short- and long-reach SONET and other high-speed digital
applications.

Features

2.5 Gbits/s operation

■

Eight-pin package suitable for SONET/SDH appli-

■

cations
MQW F-P 1.3 µ m laser with single-mode fiber pig-

■

tail
Wide operating temperature range:

■

–40 ° C to +85 ° C
No TEC required

■

25 Ω input impedance

■

Benefits

■

Easily board mounted

■

Gull wing leads

■

No additional heat sinks required

Description

The D374-T ype Uncooled Laser Module consists of a
laser diode coupled to a single-mode fiber pigtail.
The device is available in a standard, 8-pin configu­ration (see Figure 1 and/or Table 1) and is ideal for
short-reach and other high-speed digital applica­tions. It is developed specifically for 2.5 Gbits/s appli­cations.

The module includes a multiquantum-well Fabry­Perot (MQW F-P) laser and an InGaAs PIN photo­diode back-facet monitor in an epoxy-free, hermeti­cally sealed package.

High output power: typically 1.0 mW peak power

■

coupled into single-mode fiber; 0.2 mW versions
available

Hermetically sealed active components

■

Internal back-facet monitor

■

Qualification program:

■

Telcordia Technologies

983

*

T elcordia Technologies

Technologies, Inc.

is a registered trademark of Telcordia

* TA-

±

°

°

Data Sheet

D374-Type Digital Uncooled 2.5 Gbits/s Laser Module December 2000

Description

(continued)

The device characteristics listed in this document are
met at 1.0 mW output power. Higher- or lower-power
operation is possible. Under conditions of a fixed pho­todiode current, the change in optical output is typically

0.5 dB over an operating temperature range of –40 ° C

to +85 ° C.
This device incorporates the new Laser 2000 manufac-

turing process developed by the Optoelectronic unit of
Agere Systems Inc. Laser 2000 is a low-cost platform
that targets high-volume manufacturing and tight prod­uct distributions on all optical subassemblies. This plat­form incorporates an advanced optical design that is
produced on a highly automated production line. The
Laser 2000 platform is qualified for the central office

4

3

and uncontrolled environments, and can be used for
applications requiring high performance and low cost.

Table 1. Pin Descriptions

Pin Number Connection

1 NC/reserved
2 Case ground
3 NC/reserved
4 PD cathode
5 PD anode
6 Laser diode anode (+)
7 Laser RF input cathode (–), 25 Ω
8 Laser diode anode (+)

12

56 87

1-900

Figure 1. D374-Type Digital Uncooled 2.5 Gbits/s Laser Module Schematic, Top View

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 operations sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.

Parameter Symbol Min Max Unit

P

I

V
V

OP
MAX

RL
RD

FD

C

stg

—
—

—
—

150

10

2

20

mA

mW

V
V

—2mA
–40 85
–40 85

C
C

Maximum Peak Laser Drive Current or

Maximum Fiber Power*

Peak Reverse Laser Voltage:

Laser

Monitor
Monitor Forward Current I
Operating Case Temperature Range T
Storage Case Temperature Range T
Lead Soldering Temperature/Time — — 260/10 ° C/s
Relative Humidity (noncondensing) RH — 85 %

* Rating varies with temperature.

22

Agere Systems Inc.

°

∆λ

±

Ω

µ

Data Sheet
December 2000 D374-Type Digital Uncooled 2.5 Gbits/s Laser Module

Handling Precautions

Caution: This device is susceptible to dama ge as a result of electrostatic disc harge (ESD). T ake pr oper pre-

cautions during both handling and testing. Follow guidelines such as JEDEC Pub lication No. 108­A (Dec. 1988).

Although protection circuitry is designed into the device, take proper precautions to avoid exposure to ESD.

Electrical/Optical Characteristics

Table 2. Electrical/Optical Characteristics (over operating temperature range unless otherwise noted)

Parameter Symbol Test Conditions Min Typ Max Unit

Operating Temperature

Range
Optical Output Power* P
Threshold Current I

Modulation Current I

Slope Efficiency

†

Center Wav elength
RMS Spectral Width
Tracking Error TE I
Spontaneous Emission P
Rise/Fall Times t

Forward Voltage V
Input Impedance R — — 25 —
Monitor Current I
Monitor Dark Current I
Wavelength Temperature

Coefficient

* Higher and lower powers available. See Table 4 for more information.
† The slope efficiency is used to calculate the modulation current for a desired output power. This modulation current plus the threshold current

comprise the total operating current for the device.

‡V

= reverse voltage.

R

T — –40 — 85

F

TH

MOD

CW, P

CW, nominal — 1 — mW

T = 25 ° C

T = full range

F

= 1.0 mW, T = 25 ° C

MON

CW, I

= constant,

4.5
1

10

8

9

—
15

—

15
45

20
35

C

mA
mA

mA
mA

T = full range

SE CW, P

λ

C

TH

, t

R

F

= 1.0 mW, T = 25 ° C 50 75 100 µ W/mA

F

P

= 1.0 mW, CW 1270 — 1350 nm

F

P

= 1.0 mW, 155 Mbits/s — 2 3 nm

F

= constant, CW — 0.5

MON

I = (0.9) I

TH

10%—90% pulse

——50
— 0.125 0.150 ns

1dB

µ

W

T = 25 ° C

F

MON

D

At bias coil — 1.1 1.6 V

‡

V

R

= 5 V 150 — 750

‡

V

R

= 5 V — 10 200 nA

A

— — — 0.4 0.5 nm/ ° C

Agere Systems Inc.

3