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107952814

1.5 µm D2500-Type Digital Isolated DFB Laser Module

Agere -> LSI Corporation 

1.5 µm D2500-Type Digital

Isolated DFB Laser Module

Data Sheet

February 2000

Characteristics

Minimum and maximum values are testing requirements. Typical values are characteristics of the device and are

the result of engineering evaluations. Typical values are for information purposes only and are not part of the test-

ing requirements.

Table 1. Electrical Characteristics (at 25 °C Laser Temperature)

Parameter

Symbol

Test Conditions

Laser Forward Voltage

Slope Efficiency

Threshold Current

VLF

LF = 2 mW (CW)

η

LF = 2 mW (CW)

ITH

—

Monitor Reverse-bias Voltage* VRMON

—

Monitor Current

IRMON

PO = 1 mW (CW)

Monitor Dark Current

ID

IF = 0, VRMON = 5 V

Input Impedance

ZIN

—

Thermistor Current

Resistance Ratio†

ITC

—

—

—

Thermistor Resistance

TEC Current

RTH

ITEC

TL = 25 °C

TL = 25 °C, TC = 70 °C

TEC Voltage

TEC Capacity

VTEC

∆T

TL = 25 °C, TC = 70 °C

TC = 70 °C

* Standard operating condition is 5.0 V reverse bias.

† Ratio of thermistor resistance at 0 °C to thermistor resistance at 50 °C.

Min

—

0.025

—

3

0.1

—

—

10

8.6

9.5

—

—

50

Typ

1.3

0.10

12

5

1.0

0.01

25

—

—

—

0.6

1.3

—

Max

Unit

1.8

V

— mW/mA

50

mA

10

V

2.0

mA

0.1

µA

—

Ω

100

µA

9.6

—

10.5

kΩ

1.0

A

2.0

V

—

°C

Table 2. Optical Characteristics (at 25 °C Laser Temperature)

Parameter

Peak Optical Output Power

Center Wavelength

Spectral Width:

Full Width at –3 dB

Full Width at –20 dB

Side-mode Suppression Ratio

Optical Isolation

Symbol

Test Conditions

Min Typ Max Unit

PPEAK

—

2.0

—

— mW

λC

—

1530 — 1570 nm

∆λ

Modulated at 2.5 Gbits/s at — 0.20 0.30 nm

rated power

—

0.8 1.0 nm

SMSR Modulated at 2.5 Gbits/s 30

—

—

dB

—

0 °C to 65 °C

30

—

—

dB

Table 3. Dispersion Performance (examples of dispersion penalty specifications)

Parameter

Dispersion Penalty:*

D2502

D2511

D2517

Symbol Test Conditions Min Typ Max Unit

DP

1350 ps/nm

— — 2.0 dB

DP

1800 ps/nm

— — 2.0 dB

DP

3000 ps/nm

— — 2.0 dB

* Other dispersion penalties at various dispersions available.

4

Lucent Technologies Inc.

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