FLD5F6CX-J

Edition 1.0
December 1999

1,550nm MQW-DFB
DWDM Direct Modulation Laser

FLD5F6CX-J

FEATURES

· Direct Modulated MQW DFB Laser
· Built-in TEC, Thermistor and Monitor PD
· 14-Pin Butterfly Type Module
· 10mW Output Power
· Low Residual Chirp
· Optimized for 2.5 Gb/s Modulation Rates
· Selected wavelengths according to ITU-T grid available

APPLICATIONS

This MQW laser is intended for the application of 2.5 Gb/s

long haul Dense Wavelength Division Multiplexing (DWDM).
Transmission spans of 100 km are possible without amplification.

DESCRIPTION

The Multiple Quantum Well (MQW) Laser is a high power laser
capable of 2.5 Gb/s transmission. It is packaged in a "butterfly" type module.
The module employs a high efficiency optical coupling system, coupling the
laser output through a built-in optical isolator into a single mode fiber pigtail.
The modules also include a monitor photodiode, a thermoelectric cooler (TEC)
and thermistor. This device is designed for use in DWDM direct modulation transmission
systems. Selected wavelengths specified to the ITU-T grid are available.

Parameter

Forward Current

TEC Voltage

Symbol

Condition

Photodiode Reverse Voltage

VDR

150

2.5

Ratings

Photodiode Forward Current

IDF

Optical Output Power

12.0

<260

°C

Reverse Voltage

Unit

ABSOLUTE MAXIMUM RATINGS (Tc=25°C)

TEC Current

Lead Soldering Time

Tsold

1.4

sec

Environmental Operating Humidity

Environmental Storage Humidity

Xop

Storage Temperature

Tstg

-40 to +70

°C

Operating Case Temperature

Top

-20 to +65

°C

Xst

Top<30

°C

Tst<30

°C

1,550nm MQW-DFB

DWDM Direct Modualtion Laser

FLD5F6CX-J

Parameter

Threshold Power

Symbol

Pth

Slope Efficiency

Series Resistance

Optical Output Power

OPTICAL AND ELECTRICAL CHARACTERISTICS (TL=Tset, Tc=25°C, BOL, unless otherwise specified)

Laser Set Temperature

Tset

Tracking Error (Note 1)

IF=Ith, CW

Conditions

CW, Pf=10mW

Pf=10mW, Tc=-20 to 65°C

µW

mW/mA

Unit

°C

Min.

Limits

150

10.0

0.14

+0.5

-0.5

Kinks (up to 2.4 mW)

Kns

None

BER Performance

Note (3)

No Floor

Pulsation

None

Peak Wavelength

Note (2)

Note (4)

Threshold Current

Ith

Forward Voltage

VFDC

CW, IF=30 mA, pin 12-13

CW, pin 12-13

Monitor Current

CW, Pf=10mW, VDR=5V

1.0

0.10

Photodiode Dark Current

VDR=5V

100

Photodiode Capacitance

VDR=5V, f=1 MHz

Photodiode Cutoff Frequency

fcm

VDR=5V, 50 load

MHz

100

Side Mode Suppression

Note (2)

Rise Time (10%-90%)

Note (2)

nsec

0.125

0.1

Spectral Width (-20dB)

Note (2)

0.5

Fall Time (10%-90%)

Note (2)

nsec

0.125

0.1

Cutoff Frequency

Pf=10mW, -3 dB

GHz

4.0

Relative Intensity Noise

RIN

f=2.5 GHz

Pf=10 mW, ORL=24 dB

dB/Hz

-140

Power Penalty

Note (3)

1.5

In-Band Ripple (Window)

S21

f=50 MHz~3 GHz

f=50 MHz~2 GHz

+/-1.5

RF Return Loss

S11

f=2 GHz~3 GHz

f=3 GHz~5 GHz

Optical Isolation

Tc=-20 to 65

°C

1.6

1.75

Max.

Typ.

Note 1. TE=10*log{pf(Tcase)/Pf(Tc=25

°C)}dB, APC

Note 2. 2.5 Gb/s NRZ, pseudo-random, Pb=0.2mW, Ppeak=2.0mW
Note 3. Bit rate=2.48832 Gb/s, PRBS=2

-1, Dispersion=1,800 ps/nm (116km), Ppeak=10mW,

Pbias=1.0mW (Extinction ratio=10dB), B.E.R.=1x10

--10

Decision point: Center of Back-to-Back at 10Decision point: Center of Back-to-Back at 10

-9

Receiver: Fujitsu Standard Receiver
Note 4. The selected wavelengths available are listed in Fig. 8

1,550nm MQW-DFB
DWDM Direct Modulation Laser

FLD5F6CX-J

Parameter

TEC Current

TEC Voltage

Cooler Power

Thermistor Resistance

Thermistor B Constant

Symbol

Rtr

TL=Tset,

Pf=10mW, Tc=65

°C

TL=Tset,

Pf=10mW, Tc=65

°C

TL=Tset,

Pf=10mW, Tc=65

°C

TL=Tset,

Pf=10mW, Tc=65

°C

TL=15 to 35

°C

Test Conditions

Unit

TEC Resistance

RTEC

PTEC

TEC AND THERMISTOR CHARACTERISTICS

Limit

1.0

2.4

12.6

Max.

Typ.

7.7

3.2

3,630

3,270

3,450

2.4

2.0

Min.

(TL=Tset, Tc=25°C, BOL, unless otherwise specified)

Fig. 1 Forward Current vs Output Power

Forward Current, If (mA)

Output Power, Pf (mW)

Fig. 2 Frequency Response

Frequency (GHz)

Relative Output (dB)

6
3

-3

-6

-9

-12

Pf=10mW

TL = 25°C

1,550nm MQW-DFB

DWDM Direct Modualtion Laser

FLD5F6CX-J

Fig. 4 Cooler Voltage -Current

Case Temperature (

°C)

Cooler Voltage (V)

Cooler Current (A)

-1.0

3.0

2.0

0.0

1.0

-1.0

3.0

2.0

0.0

1.0

Fig. 3 RF Return Loss

Frequency (GHz)

Return Loss (dB)

-10

-20

Fig. 5 Spectrum

Wavelength

(nm)

Relative Intensity (dB)

-10

-40

-50

-60

-20

-30

1545

1550

1555

Fig. 6 Temperature Dependance of

Wavelength (ACC)

Laser Temperature, TL (°C)

Wavelength (nm)

1550

1551

1552

1553

1554

1,550nm MQW-DFB
DWDM Direct Modulation Laser

FLD5F6CX-J

Fig. 7 Transmission Characteristics

Average Received Optical Power (dBm)

Bit Error Rate

-12

-10

-8

-6

-4

-40

-35

-30

-25

2.48832 Gb/s, NRZ
PRBS 2

23-1

TL=Tset,
Ppeak=10mW,
Pb=1mW,
(Rext=10dB)

After
116km
Transmission

Back to Back

Fig. 8 Wavelength Table

Part Number

FLD5F6CX-J62

-J61
-J60
-J59
-J58
-J57
-J56
-J55
-J54
-J53
-J52
-J51
-J50
-J49
-J48
-J47

1527.99
1528.77
1529.55
1530.33
1531.12
1531.90
1532.68
1533.47
1534.25
1535.04
1535.82
1536.61
1537.40
1538.19
1538.98
1539.77
1540.56
1541.35
1542.14
1542.94
1543.73

±0.1

Wavelength (nm)

(TL=Tset)

(in vacuum)

Tolerance (nm)

-J46
-J45
-J44
-J43
-J42

1544.53
1545.32
1546.12

±0.1

-J41
-J40
-J39
-J38
-J37
-J36
-J35
-J34
-J33
-J32
-J31
-J30
-J29
-J28
-J27
-J26
-J25
-J24
-J23
-J22
-J21
-J20
-J19
-J18

1546.92
1547.72
1548.51
1549.32
1550.12
1550.92
1551.72
1552.52
1553.33
1554.13
1554.94
1555.75
1556.55
1557.36
1558.17
1558.98
1559.79
1560.61
1561.42
1562.23
1563.05

±0.1

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