AGERE D2587P910, D2587P9095, D2587P909, D2587P9085, D2587P908 Datasheet

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AGERE D2587P910, D2587P9095, D2587P909, D2587P9085, D2587P908, D2587P9075, D2587P907, D2587P906, D2587P9055, D2587P905, D2587P8795, D2587P879, D2587P8785, D2587P878, D2587P8775, D2587P877, D2587P8765, D2587P876, D2587P8755, D2587P875, D2587P8845, D2587P884, D2587P8835, D2587P883, D2587P8825, D2587P882, D2587P8815, D2587P881, D2587P8805, D2587P880, D2587P874, D2587P8735, D2587P873, D2587P8725, D2587P872, D2587P8715, D2587P871, D2587P8705, D2587P870, D2587P8695, D2587P9045, D2587P904, D2587P9035, D2587P903, D2587P9025, D2587P902, D2587P9015, D2587P901, D2587P9005, D2587P900, D2587P8995, D2587P899, D2587P8985, D2587P898, D2587P8975, D2587P897, D2587P8965, D2587P896, D2587P8955, D2587P895, D2587P9145, D2587P914, D2587P9135, D2587P913, D2587P9125, D2587P912, D2587P9115, D2587P911, D2587P9105, D2587P9165, D2587P916, D2587P9155, D2587P915, D2587P8945, D2587P894, D2587P8935, D2587P893, D2587P8925, D2587P892, D2587P8915, D2587P891, D2587P8905, D2587P890, D2587P8895, D2587P889, D2587P8885, D2587P888, D2587P8875, D2587P887, D2587P8865, D2587P886, D2587P8855, D2587P885, D2587P345, D2587P34, D2587P335, D2587P33, D2587P325, D2587P32, D2587P315, D2587P31, D2587P305, D2587P30, D2587P395, D2587P39, D2587P385, D2587P38, D2587P37, D2587P365, D2587P36, D2587P355, D2587P35, D2587P245, D2587P24, D2587P235, D2587P23, D2587P225, D2587P22, D2587P215, D2587P21, D2587P205, D2587P20, D2587P44, D2587P435, D2587P43, D2587P425, D2587P42, D2587P415, D2587P41, D2587P405, D2587P40, D2587P54, D2587P535, D2587P53, D2587P525, D2587P52, D2587P515, D2587P51, D2587P505, D2587P50, D2587P495, D2587P869, D2587P8685, D2587P868, D2587P8675, D2587P867, D2587P8665, D2587P866, D2587P8655, D2587P865, D2587P8645, D2587P864, D2587P8635, D2587P863, D2587P8625, D2587P862, D2587P61, D2587P605, D2587P60, D2587P595, D2587P59, D2587P585, D2587P58, D2587P575, D2587P57, D2587P565, D2587P56, D2587P555, D2587P55, D2587P545, D2587P49, D2587P485, D2587P48, D2587P475, D2587P47, D2587P465, D2587P46, D2587P455, D2587P45, D2587P445, D2587P295, D2587P29, D2587P285, D2587P28, D2587P275, D2587P27, D2587P265, D2587P26, D2587P255, D2587P25, D2587P195, D2587P19, D2587P185, D2587P18, D2587P175, D2587P17, D2547P915, D2547P914, D2547P913, D2547P912, D2547P911, D2547P910, D2547P909, D2547P908, D2547P907, D2547P877, D2547P876, D2547P875, D2547P874, D2547P873, D2547P871, D2547P870, D2547P869, D2547P868, D2547P887, D2547P886, D2547P885, D2547P882, D2547P881, D2547P880, D2547P878, D2547P897, D2547P896, D2547P895, D2547P894, D2547P893, D2547P892, D2547P891, D2547P890, D2547P888, D2547P916, D2547P905, D2547P904, D2547P903, D2547P902, D2547P901, D2547P900, D2547P899, D2547P898, D2547P27, D2547P26, D2547P25, D2547P24, D2547P22, D2547P21, D2547P20, D2547P19, D2547P18, D2547P17, D2547P867, D2547P866, D2547P865, D2547P864, D2547P863, D2547P862, D2547P61, D2547P60, D2547P58, D2547P47, D2547P46, D2547P45, D2547P43, D2547P42, D2547P41, D2547P40, D2547P39, D2547P38, D2547P37, D2547P36, D2547P35, D2547P33, D2547P32, D2547P31, D2547P30, D2547P29, D2547P28, D2547P57, D2547P56, D2547P55, D2547P54, D2547P53, D2547P52, D2547P51, D2547P50, D2547P49, D2547P48, D2547P872, D2547P884, D2547P883, D2547P879, D2547P889, D2547P906, D2547P59, D2547P44, D2547P34 Datasheet

Data Sheet, Rev. 2

July 2001

Wavelength-Selected High-Power D2587P-Type (with Wavelength Locker)/D2547P-Type Isolated DFB Laser Modules

Applications

■

Telecommunications: — Dense WDM — SONET/SDH OC-192/STM-64 — Extended and ultralong reach — Undersea systems

■

Digital video

Description

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) applications.

Features

■

High-performance, multiquantum-well (MQW), distributed-feedback (DFB) laser

■

D2587P-Type is offered on 50 GHz ITU grid wavelengths ranging from 1528.77 nm—

1610.06 nm

■

D2547P-Type is offered on 100 GHz ITU grid wavelengths ranging from 1528.77 nm—

1610.06 nm

■

Polarization-maintaining fiber pigtail

■

For use with lithium niobate modulators

■

High optical power (20 mW, CW)

■

Hermetic, 14-pin package

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.

Wavelength-Selected, High-Power D2587P-Type (with Wavelength Data Sheet, Rev. 2 Locker)/D2547P-Type Isolated DFB Laser Modules July 2001

Description

(continued)

Principles of Operation (Controlled W avelength)

The single-channel, wavelength-selected DFB (ILM) package contains internal wavelength-disc riminating optics , i.e . , two etalons and associated photodiodes. The output consists 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 suppresses optical feed back in laser-based, fiber-optic systems. 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 heat ing and cooling of the laser chip to maintain a temperature of 25 °C for ca se temperatures fro m –25 °C to +70 °C. The laser temperature is monitored by the internal thermistor, which can be used with external circuitry to control the laser chip temperature.

Agere Systems’ optoelectronic components are being qualified to rigorous internal standards that are consistent with

Telcordia Technologies

manufacturing oper ations are

†

TR-NWT-000468. All design and

9001 certified. The

ISO

module is being fully qualified for central office applications.

* †

is a registered trademark of Fujikura Ltd.

Fujikura Telcordia Technologies

Inc.

is a registered trademark of The International Organization for

ISO

Standardization.

is a trademark of Telcordia Technologies

CORE STRESS ROD

PRINCIPLE POLARIZATION AXIS

CLADDING INNER COATING

(SILICON & ACRYLATE) OUTER COAT ING

1-771(C).a

Figure 1. Polarization-Maintaining Fiber

Pin Information

Table 1. Pin Descriptions

Controlled Power

An internal, InGaAs, PIN photodiode functions as the backfacet monitor. The photodiode monitors emission from the rear facet of the laser and, when used in conjun ct io n with control circuitry, can control optic al power launched into the fiber. Normally, this configuration is used in a feedbac k 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 p ath from the RF input. The RF input has a nominal 25 Ω impedance.

The laser module is equipped with

Fujikura

maintaining fiber (PMF). The fiber is PANDA type an d 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 125µm ±3 µm, and a loose tube jacketed fiber 900 µm in diameter. Figure 1 shows the orientation of polarization in the fiber.

* polarization-

Pin D2587P-Type D2547P-Type

1 Thermistor Thermistor 2 Thermistor Thermistor 3 Laser dc Bias

(Cathode) (–)

4 Back-facet Monitor

Anode (–)

5 Back-facet Monitor

Cathode (+) 6TEC (+) 7TEC (–)

1 1

Laser dc Bias (Cathode) (–)

Back-facet Monitor Anode (–)

Back-facet Monitor Cathode (+)

TEC (+) TEC (–)

1 1

8 Case Ground Case Ground 9

Photodiode 2 Anode

10λ Photodiode 1 Anode 11 Laser Anode (+)

12 RF Laser Input

Cathode (–)

13 Laser Anode (+)

14 NC

1.A positive current through the thermoelectric heat pump cools the laser.

2.Both leads should be grounded for optimum performance.

Case Ground Case Ground

Laser Anode (+) RF Laser Input

Cathode (–) Laser Anode (+)

Case Ground

Agere Systems Inc.

Data Sheet, Rev. 2 Wavelength-Selected, High-Power D2587P-Type (with Wavelength July 2001 Locker)/D2547P-Type Isolated DFB Laser Modules

Description

(continued)

76 54 32 1

–+ +– –

TEC

PACKAGE

GROUNDS

8 9 10 11 12 13

140 nH

+–+

R1 20

10 k

ISOLATOR

Ω

1-567

Top view .

Figure 2. D2547P Circuit Schematic

7654321

TEC

WAVE

POWER

RFC

PM FIBER PIGTAIL

Block Diagram

A TO D

CONVERTER

MICROPROCESSOR

8 9 10 11 12 13 14

Figure 3. D2587P Circuit Schematic

DUAL

ETALON

THERMISTOR

EEPROM

D TO A

CONVERTER

THERMOELECTRIC COOLER

SUGGESTED ELECTRONICS MODULE (CUSTOMER SUPPLIED)

VOLTAGE PROPORTIONAL TO WAVELENGTH VOLTAGE PROPORTIONAL TO OPTICAL POWER VOLTAGE PROPORTIONAL TO TEMPERATURE

DFB

SILICON SUBMOUNT

1-1130(F)

LASER MODULE

ISOLATOR AND

FIBER COUPLING

OPTICS

Agere Systems Inc.

1-1129(F)

Wavelength-Selected, High-Power D2587P-Type (with Wavelength Data Sheet, Rev. 2 Locker)/D2547P-Type Isolated DFB Laser Modules July 2001

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability.

Parameter Symbol Min Max Unit

Laser Reverse Voltage V dc Forward Current I Operating Case Temperature Range T Storage Case Temperature Range* T Photodiode Reverse Vo lta ge V Photodiode Forward Current I

* Does not apply to shipping container.

RLMAX

FLMAX

stg

RPDMAX

FPDMAX

—2 V

— 225 mA –25 70 °C –40 70 °C

—10 V

—2 mA

Handling Precautions

Power Sequencing

To avoid the possibility of damage to the laser module from power supply switching transients, follow this turn-on sequence:

1. All ground connections

2. Most negative supply

3. Most positive supply

4. All remaining connections Reverse the order for the proper turn-off sequence.

Electrostatic Discharge

CAUTION: This device is susceptible to damage as

a result of electrostatic discharge. Take proper precautions during both handling and testing. Follow guidelines such as JEDEC Publication No. 108-A (Dec. 1988).

Agere Systems employs a human-body model (HBM) for ESD-susceptibility testing and protection-design evaluation. ESD voltage thresholds are dependent on the critical parameters used to define the model. A standard HBM (resistance = 1.5 kΩ, capacitance = 100 pF) is widely used and, therefore, can be used for comparison purposes. The HBM ESD threshold presented here was obtained using these circuit parameters:

Mounting Instructions

The minimum fiber bend radius is 1.0 in. (25.4 mm) To avoid degradation in performance, mount the mod-

ule on the board as follows:

1. Place the bottom flange of the module on a flat heat sink at least 0.5 in. x 1.180 in. (12.7 mm x 30 mm) in size. The surface finish of the heat sink should be better than 32 µin. (0.8 µm), and the surface flatness must be better than 0.001 in. (25.4 µm). Using thermal conductive grease is optional; however, thermal performance can be improved by up to 5% if conductive grease is applied between the bottom flange and the heat sink.

2. Mount four #2-56 screws with Fillister heads (M2-3 mm) at the four screw hole locations (see Outline Diagram). The Fillister head diameter must not exceed 0.140 in. (3.55 mm). Do not apply more than 1 in.-lb. of torque to the screws.

0.062 (1.58)

0.031 (0.79)

0.140 (3.56)

Note: Dimensions are in inches and (millimeters).

0.118 (3.00)

0.086 (2.18)

0.129 (3.28) R

0.041 (1.04)

1-532(C)

Parameter Value Unit

Human-body Model >400 V

Figure 4. Fillister Head Screw

Agere Systems Inc.

Data Sheet, Rev. 2 Wavelength-Selected, High-Power D2587P-Type (with Wavelength July 2001 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 Symbol Test Conditions Min Typ Max Unit

Threshold Current I

Drive Current — L

RMON

PD1

PD2

D IN

LF = 20 mW (CW) — 2 2.5 V

PO = 20 mW (CW)

IF = 0, V

Laser Forward Voltage V Monitor Reverse-bias Voltage* V Monitor Current:

Back-facet Monitor

Photodiode 1

Photodiode 2

Monitor Dark Current I Input Impedance Z

— — 15 40 mA

= 20 mW — — 165 mA

—3510V

0.003

RMON

= 5 V — 0.01 0.1 µA

— — —

0.06

——25—Ω Filter Slope — — 0.5 — 8 /nm Frequency Capture Range — Measured from λ

ITU

15 — — GHz

toward increasing λ and

decreasing λ Thermistor Current I Resistance Ratio

†

Thermistor Resistance R Laser Submount Temperature T TEC Current I TEC Voltage V TEC Capacity ∆TT

— 10 — 100 µA

— — 9.1 9.6 10.1 —

SET

TEC

TL = 25 °C 9.5 — 10.5 kΩ

—20—35°C TL = 25 °C, TC = 70 °C — — 1.7 A TL = 25 °C, TC = 70 °C — — 2.8 V

= 70 °C — 50 °C

mA mA mA

* S tandard operating condition is 5.0 V reverse bias. † Ratio of thermistor resistance at 0 °C to thermistor resistance at 50 °C.

Table 3. D2587-Type Optical Characteristics

(at 25 °C laser temperature)

Parameter Symbol Test Conditions Min Typ Max Unit

Peak Optical Output Power P Center Wavelength*

(See Ordering Information, page 9.)

Line Width (3 dB full width) ∆λ CW, P

—20.0——mW

SET

TL = T

ITU

= λ

± 0.1 nm

= 20.0 mW — 2 10 MHz

1528.77 — 1610.06 nm

Side-mode Suppression Ratio SMSR CW 35 45 — dB Relative Intensity Noise RIN CW, P

= 20 mW

— — –135 dB/Hz

200 MHz < f < 10 GHz Optical Isolation — T Optical Polarization Extinction Ratio

†

— 0 °C to 75 °C 20 — — dB

FM Efficiency FM f

Wavelength Drift (EOL) ∆λ

= 0 °C to 75 °C 30 — — dB

MOD

= 30 kHz,

= 20 mW

Tested over

—100—MHz/mA

——±2.5GHz

25-year lifeti me

* Custom wavelengths available. † The

ferrule key is not aligned to slow axis of fiber. Connector is intended for testing purposes only.

Agere Systems Inc.

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