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108898073

D372-Type Digital Uncooled DFB Laser Module for 2.5 Gbits/s Applications

Agere -> LSI Corporation 

Data Sheet

December 2000

D372-Type Digital Uncooled DFB

Laser Module for 2.5 Gbits/s Applications

Handling Precautions

Caution: This device is susceptible to damage as a result of electrostatic discharge (ESD). Take proper

precautions during both handling and testing. Follow guidelines such as JEDEC Publication No.

108-A (Dec. 1988).

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

Electrical/Optical Characteristics

Table 2. D372-20 Electrical/Optical Characteristics (over operating temperature range unless otherwise noted)

Parameter

Symbol

Test Conditions

Min Typ Max Unit

Operating Temperature

Range

Optical Output Power

Threshold Current

Modulation Current

Slope Efficiency*

Center Wavelength

Spectral Width (–20 dB)

Side-mode Suppression

Ratio

Tracking Error

Spontaneous Emission

Rise/Fall Times

Dispersion Penalty

Optical Return Loss

Forward Voltage

Input Impedance

Monitor Current

Monitor Dark Current

Wavelength Tempera-

ture Coefficient

T

PF

ITH

IMOD

SE

λC

∆λ

SMSR

TE

PTH

tR, tF

DP

ORL

VF

R

IMON

ID

—

—

–40

—

85

°C

CW, peak

—

2

—

mW

T = 25 °C

T = full range

5

11

15

mA

2

—

50

mA

CW, PF = 2.0 mW, T = 25 °C

13

20

33

mA

CW, IMON = const.,T = full range 7.5

—

55

CW, PF = 2.0 mW, T = 25 °C

61

—

154 µW/mA

PF = 2.0 mW, CW

1280

—

1335

nm

PF = 2.0 mW

—

—

1

nm

CW, PF = 2.0 mW

30

40

—

dB

IMON = constant, CW

I = (0.9) ITH

10%—90% pulse†, T = 25 °C

<60 km, 256 ps/nm

CW

At bias coil

—

VR‡ = 5 V

VR‡ = 5 V

—

—

0.5 1.25

dB

—

—

50

µW

— 0.125 0.150 ns

—

—

1.0

dB

18

—

—

dB

—

1.1

1.6

V

—

25

—

Ω

100

—

1000

µA

—

10

200

nA

—

0.09

0.1 nm/°C

* 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.

† Corrected for electrical pulse fall time.

‡ VR = reverse voltage.

Agere Systems Inc.

3

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