2

Agere Systems Inc.

Preliminary Data Sheet

D1861A 10 Gbits/s 1310 nm DML Module (10 dBm)

March 2001

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 operational sections of the data sheet. Exposure to absolute maximum ratings for extended

periods can adversely affect device reliability. RF input shall be ac coupled. It is recommended that a series induc-

tor of 100

1. RF connector ac coupled.

Electrical/Optical Characteristics

1. 10 Gbits/s PRBS 2

2. Measurements made with 100

µH in series with pin 3 (laser cathode).

Parameter

Symbol

Condition

Min

Max

Unit

Operating Temperature Range

—

–40

80

°C

Storage Case Temperature Range

Tstg

—

–40

85

°C

Laser Forward Bias

—

TEC On

—

150

mA

——

1

V

—

—

200

mA

Reverse Voltage Photodiode

——

20

V

TEC Current

——

1.7

A

Table 2. Electrical and Optical Characteristics (Case temperature, –5 °C to +80 °C; laser temperature, 25 °C

unless otherwise noted.)

Parameter

Symbol

Condition

Min

Typ

Max

Unit

Average Optical Output Power

7

—

—

mW

Threshold Current (BOL)

—2

—

30

mA

Wavelength

λ

—

1290

—

1320

nm

Wavelength Tuning Coefficient

—

—

0.085

—

nm/°C

External Efficiency

η

—0.24

—

—

W/A

ac Side-mode Suppression Ratio

SMSR

35

—

—

dB

Chromatic Dispersion Penalty

(50 km, SMF28, 200 ps/nm)

——

1.0

dB

Optical Isolation

—

—

32

—

—

dB

High-frequency Cutoff (3 dB)

14

—

—

GHz

Low-frequency Cutoff (3 dB)

——

30

kHz

RF Return Loss, 50

Ω

(0.1 GHz—8 GHz)

10

—

—

dB

Rise/Fall Time, 10%—90%

—

—

50

ps

Thermoelectric Cooler Current

——

—

1.3

A

Thermistor Resistance

—

9.5

10

10.5

k

Ω

Thermistor Coefficient

—

—

—

–4.4

—

%/°C

Monitor Photodiode Current

40

—

1500

µA