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108898081

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

Agere -> LSI Corporation 

D372-Type Digital Uncooled DFB

Laser Module for 2.5 Gbits/s Applications

Data Sheet

December 2000

Electrical/Optical Characteristics (continued)

Table 3. D372-21 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

—

—

0

CW, peak

T = 25 °C

T = full range

CW, PF = 2.0 mW, T = 25 °C

CW, IMON = const.,T = full range

CW, PF = 2.0 mW, T = 25 °C

PF = 2.0 mW, CW

PF = 2.0 mW

CW, PF = 2.0 mW

(See Reliability Information, below)

IMON = constant, CW

I = (0.9) ITH

10%—90% pulse†, T = 25 °C

<60 km, 256 ps/nm

(See Reliability Information, below)

CW

At bias coil

—

VR‡ = 5 V

VR‡ = 5 V

—

—

5

2

13

7.5

61

1280

—

30

—

—

—

—

18

—

—

100

—

—

—

2

11

—

20

—

—

—

—

—

0.5

—

0.125

—

—

1.1

25

—

10

0.09

85

°C

—

15

50

33

55

154

1335

1

—

mW

mA

mA

mA

µW/mA

nm

nm

dB

1.25

dB

50

µW

0.150 ns

1.0

dB

—

1.6

—

1000

200

0.1

dB

V

Ω

µA

nA

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.

Reliability Information

Note, the D372-21 product does not undergo any routine dynamic testing.

A 2000-piece sample was tested at 2.5 Gbits/s for SMSR at 0 °C. In that sample, 99.5% of the devices had SMSR

values greater than 30 dB. Within the failures, 90% were for inability to achieve an extinction ration of 10 dB or

more.

Surveillance samples are tested to verify that the failure rate has not changed,

4

Agere Systems Inc.

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