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D2587P870 PDF Datasheet - Wavelength-Selected High-Power D2587P-Type (with Wavelength Locker)/D2547P-Type Isolated DFB Laser Modules - Agere Systems

Part Number D2587P870
Description Wavelength-Selected High-Power D2587P-Type (with Wavelength Locker)/D2547P-Type Isolated DFB Laser Modules
Manufacturers Agere Systems 
Logo Agere Systems Logo 
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D2587P870 datasheet, circuit
Data Sheet, Rev. 2
July 2001
Wavelength-Selected High-Power D2587P-Type (with
Wavelength Locker)/D2547P-Type Isolated DFB Laser Modules
Applications
s Telecommunications:
— Dense WDM
— SONET/SDH OC-192/STM-64
— Extended and ultralong reach
— Undersea systems
s Digital video
Featuring wavelength selection and locking capabilities, the
D2587P Laser Module is ideally suited for use with external
lithium niobate modulators, and in high-power (20 mW) appli-
cations.
Features
s High-performance, multiquantum-well (MQW),
distributed-feedback (DFB) laser
s D2587P-Type is offered on 50 GHz ITU grid
wavelengths ranging from 1528.77 nm—
1610.06 nm
s D2547P-Type is offered on 100 GHz ITU grid
wavelengths ranging from 1528.77 nm—
1610.06 nm
s Polarization-maintaining fiber pigtail
s For use with lithium niobate modulators
s High optical power (20 mW, CW)
s Hermetic, 14-pin package
Description
The D2587P-Type DFB laser module is designed for
use with an external lithium niobate modulator and
also in applications where high power (20 mW) is
required.
The use of an internal wavelength locker greatly
enhances long-term reliability and reduces chirp and
mode dispersion when used in conjunction with LN
modulators at OC-192 data rates.
A companion device, the D2547P high-power DFB
laser module, is also designed for use with a lithium
niobate external modulator, but without the use of an
internal wavelength locker.

1 page
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D2587P870 pdf, schematic
Wavelength-Selected, High-Power D2587P-Type (with Wavelength
Locker)/D2547P-Type Isolated DFB Laser Modules
Data Sheet, Rev. 2
July 2001
Description (continued)
Principles of Operation (Controlled Wave-
length)
The single-channel, wavelength-selected DFB (ILM) pack-
age contains internal wavelength-discriminating optics, i.e.,
two etalons and associated photodiodes. The output con-
sists of analog signals suitable for controlling the electrical
current of the thermoelectric cooler (TEC) and the DFB
laser.
Controlled Feedback
The module contains an internal optical isolator that sup-
presses optical feedback in laser-based, fiber-optic sys-
tems. Light reflected back to the laser is attenuated a
minimum of 30 dB.
Controlled Temperature
An integral TEC provides stable thermal characteristics.
The TEC allows for heating and cooling of the laser chip to
maintain a temperature of 25 °C for case temperatures from
–25 °C to +70 °C. The laser temperature is monitored by
the internal thermistor, which can be used with external cir-
cuitry to control the laser chip temperature.
Controlled Power
An internal, InGaAs, PIN photodiode functions as the back-
facet monitor. The photodiode monitors emission from the
rear facet of the laser and, when used in conjunction with
control circuitry, can control optical power launched into the
fiber. Normally, this configuration is used in a feedback
arrangement to maintain consistent laser output power.
Standard Package
The laser module is fabricated in a 14-pin, hermetic, metal/
ceramic butterfly package that incorporates a bias tee that
separates the dc-bias path from the RF input. The RF input
has a nominal 25 impedance.
The laser module is equipped with Fujikura* polarization-
maintaining fiber (PMF). The fiber is PANDA type and is the
same fiber that is used on the Agere Systems Inc. lithium
niobate modulators. It has a mode field diameter of
10.5 µm, a cladding diameter of 125 µm ±3 µm, and a
loose tube jacketed fiber 900 µm in diameter. Figure 1
shows the orientation of polarization in the fiber.
Agere Systems’ optoelectronic components are being qual-
ified to rigorous internal standards that are consistent with
Telcordia Technologies TR-NWT-000468. All design and
manufacturing operations are ISO § 9001 certified. The
module is being fully qualified for central office applications.
* Fujikura is a registered trademark of Fujikura Ltd.
Telcordia Technologies is a trademark of Telcordia Technologies
Inc.
§ ISO is a registered trademark of The International Organization for
Standardization.
CORE
STRESS ROD
PRINCIPLE POLARIZATION
AXIS
CLADDING
INNER COATING
(SILICON & ACRYLATE)
OUTER COATING
1-771(C).a
Figure 1. Polarization-Maintaining Fiber
Pin Information
Table 1. Pin Descriptions
Pin D2587P-Type
D2547P-Type
1 Thermistor
2 Thermistor
3 Laser dc Bias
(Cathode) (–)
4 Back-facet Monitor
Anode (–)
5 Back-facet Monitor
Cathode (+)
6 TEC (+)1
7 TEC (–)1
8 Case Ground
9 λ Photodiode 2 Anode
10 λ Photodiode 1 Anode
11 Laser Anode (+) 2
12 RF Laser Input
Cathode (–)
13 Laser Anode (+) 2
14 NC
Thermistor
Thermistor
Laser dc Bias
(Cathode) (–)
Back-facet Monitor
Anode (–)
Back-facet Monitor
Cathode (+)
TEC (+)1
TEC (–)1
Case Ground
Case Ground
Case Ground
Laser Anode (+) 2
RF Laser Input
Cathode (–)
Laser Anode (+) 2
Case Ground
1. A positive current through the thermoelectric heat pump cools the
laser.
2. Both leads should be grounded for optimum performance.
2 Agere Systems Inc.

2 Page
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D2587P870 equivalent
Data Sheet, Rev. 2
July 2001
Wavelength-Selected, High-Power D2587P-Type (with Wavelength
Locker)/D2547P-Type Isolated DFB Laser Modules
Characteristics
Minimum and maximum values are testing requirements. Typical values are device characteristics and are results
of engineering evaluations; they are for information purposes only and are not part of the testing requirements.
Table 2. D2587-Type Electrical Characteristics (at 25 °C laser temperature)
Parameter
Threshold Current
Drive Current
Laser Forward Voltage
Monitor Reverse-bias Voltage*
Monitor Current:
Back-facet Monitor
λ Photodiode 1
λ Photodiode 2
Monitor Dark Current
Input Impedance
Filter Slope
Frequency Capture Range
Thermistor Current
Resistance Ratio
Thermistor Resistance
Laser Submount Temperature
TEC Current
TEC Voltage
TEC Capacity
Symbol
ITH
VLF
VRMON
IRMON
IλPD1
IλPD2
ID
ZIN
ITC
RTH
TSET
ITEC
VTEC
T
Test Conditions
LF = 20 mW
LF = 20 mW (CW)
PO = 20 mW (CW)
IF = 0, VRMON = 5 V
Measured from λITU
toward increasing λ and
decreasing λ
TL = 25 °C
TL = 25 °C, TC = 70 °C
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
3
0.003
0.003
0.003
0.5
15
10
9.1
9.5
20
Typ
15
2
5
0.01
25
9.6
Max
40
165
2.5
10
0.06
0.06
0.06
0.1
8
100
10.1
10.5
35
1.7
2.8
50
Unit
mA
mA
V
V
mA
mA
mA
µA
/nm
GHz
µA
k
°C
A
V
°C
Table 3. D2587-Type Optical Characteristics (at 25 °C laser temperature)
Parameter
Symbol Test Conditions
Min Typ Max
Unit
Peak Optical Output Power
PP
20.0 —
mW
Center Wavelength*
(See Ordering Information, page 9.)
λC
TL = TSET
λC = λITU ± 0.1 nm
1528.77 — 1610.06
nm
Line Width (3 dB full width)
∆λ CW, PF = 20.0 mW
— 2 10
MHz
Side-mode Suppression Ratio
SMSR
CW
35 45 —
dB
Relative Intensity Noise
RIN CW, PF = 20 mW
200 MHz < f < 10 GHz
— –135 dB/Hz
Optical Isolation
— TC = 0 °C to 75 °C 30 — —
Optical Polarization Extinction Ratio
0 °C to 75 °C
20 — —
dB
dB
FM Efficiency
FM fMOD = 30 kHz,
PF = 20 mW
— 100 — MHz/mA
Wavelength Drift (EOL)
∆λC Tested over
25-year lifetime
— — ±2.5 GHz
* Custom wavelengths available.
† The ST ® ferrule key is not aligned to slow axis of fiber. Connector is intended for testing purposes only.
Agere Systems Inc.
5

5 Page
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D2587P870 diode, scr
Data Sheet, Rev. 2
July 2001
Wavelength-Selected, High-Power D2587P-Type (with Wavelength
Locker)/D2547P-Type Isolated DFB Laser Modules
Ordering Information
Table 7. D2587P 20 mW CW Laser with Locker (C- and L-Band) Ordering Information (continued)
Device
Code
D2587P61
D2587P605
D2587P60
D2587P595
D2587P59
D2587P585
D2587P58
D2587P575
D2587P57
D2587P565
D2587P56
D2587P555
D2587P55
D2587P545
D2587P54
D2587P535
D2587P53
D2587P525
D2587P52
D2587P515
D2587P51
D2587P505
D2587P50
D2587P495
D2587P49
D2587P485
D2587P48
D2587P475
D2587P47
D2587P465
D2587P46
D2587P455
D2587P45
D2587P445
D2587P44
D2587P435
D2587P43
D2587P425
D2587P42
D2587P415
ITU-T
Center
Frequency Wavelength
(THz)
(nm)
196.1
1528.77
196.05
1529.16
196.0
195.95
1529.55
1529.94
195.9
195.85
1530.33
1530.72
195.8
195.75
1531.12
1531.51
195.7
1531.90
195.65
195.6
1532.29
1532.68
195.55
195.5
1533.07
1533.47
195.45
1533.86
195.4
195.35
1534.25
1534.64
195.3
1535.04
195.25
195.2
1535.43
1535.82
195.15
195.1
1536.22
1536.61
195.05
195.0
1537.00
1537.40
194.95
1537.79
194.9
194.85
1538.19
1538.58
194.8
194.75
1538.98
1539.37
194.7
1539.77
194.65
194.6
1540.16
1540.56
194.55
194.5
1540.95
1541.35
194.45
1541.75
194.4
194.35
1542.14
1542.54
194.3
194.25
1542.94
1543.33
194.2
194.15
1543.73
1544.13
Comcode
108835422
108875220
108835430
108875238
108835448
108875246
108835455
108875253
108835463
108875261
108835471
108875279
108835489
108875287
108835497
108875303
108835505
108875311
108835513
108875329
108835521
108875345
108835539
108875352
108835547
108875360
108835554
108875378
108835562
108875386
108835570
108875394
108835588
108875402
108835596
108875410
108835604
108875428
108835612
108875436
Device
Code
D2587P41
D2587P405
D2587P40
D2587P395
D2587P39
D2587P385
D2587P38
D2587P375
D2587P37
D2587P365
D2587P36
D2587P355
D2587P35
D2587P345
D2587P34
D2587P335
D2587P33
D2587P325
D2587P32
D2587P315
D2587P31
D2587P305
D2587P30
D2587P295
D2587P29
D2587P285
D2587P28
D2587P275
D2587P27
D2587P265
D2587P26
D2587P255
D2587P25
D2587P245
D2587P24
D2587P235
D2587P23
D2587P225
D2587P22
D2587P215
ITU-T
Center
Frequency Wavelength
(THz)
(nm)
194.1
1544.53
194.05
1544.92
194.0
193.95
1545.32
1545.72
193.9
193.85
1546.12
1546.52
193.8
193.75
1546.92
1547.32
193.7
1547.72
193.65
193.6
1548.11
1548.51
193.55
193.5
1548.91
1549.32
193.45
1549.72
193.4
193.35
1550.12
1550.52
193.3
1550.92
193.25
193.2
1551.58
1551.72
193.15
193.1
1552.12
1552.52
193.05
193.0
1552.93
1553.33
192.95
1553.73
192.9
192.85
1554.13
1554.54
192.8
192.75
1554.94
1555.34
192.7
1555.75
192.65
192.6
1556.15
1556.55
192.55
192.5
1556.96
1557.36
192.45
1557.77
192.4
192.35
1558.17
1558.58
192.3
192.25
1558.98
1559.39
192.2
192.15
1559.79
1560.20
Comcode
108835620
108875444
108835638
108875451
108835646
108875469
108835653
108875477
108835661
108875485
108835679
108875493
108835687
108875501
108835695
108875519
108835703
108875527
108835711
108875535
108835729
108875543
108835737
108875550
108835745
108875568
108835752
108875576
108835760
108875584
108835778
108875592
108835786
108875600
108835794
108875618
108835802
108875626
108835810
108875634
Agere Systems Inc.
9

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