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Details, datasheet, quote on part number:D2587P45
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| Part: | D2587P45 |
| Description: | Wavelength-selected, High-power With Locker ISOlated DFB Laser Module. Itu-t Frequency 194.5 Thz. Center Wavelength 1541.35 Nm. High Optical Power 20 MW, CW |
| Company: | Agere Systems |
| Datasheet: | Download D2587P45 datasheet File size : 126 kB |
| Request For quote: | Find where to buy D2587P45
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Datasheet text preview:
Data Sheet, Rev. 2 July 2001
Wavelength-Selected High-Power D2587P-Type (with Wavelength Locker)/D2547P-Type Isolated DFB Laser Modules
Applications
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Telecommunications: -- Dense WDM -- SONET/SDH OC-192/STM-64 -- Extended and ultralong reach -- Undersea systems Digital video
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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.
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
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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
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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 Wavelength)
The single-channel, wavelength-selected DFB (ILM) package contains internal wavelength-discriminating 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.
Agere Systems' optoelectronic components are being qualified 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.
Controlled Feedback
The module contains an internal optical isolator that suppresses optical feedback in laser-based, fiber-optic systems. Light reflected back to the laser is attenuated a minimum of 30 dB.
CORE STRESS ROD PRINCIPLE POLARIZATION AXIS CLADDING INNER COATING (SILICON & ACRYLATE) OUTER COATING
1-771(C).a
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 circuitr y to control the laser chip temperature.
Figure 1. Polarization-Maintaining Fiber
Pin Information
Table 1. Pin Descriptions
Pin 1 2 3 4 5 D2587P-Type Thermistor Ther mistor Laser dc Bias (Cathode) () Back-facet Monitor Anode () Back-facet Monitor Cathode (+) TEC (+)1 TEC ()1 Case Ground Photodiode 2 Anode Photodiode 1 Anode Laser Anode (+) 2 RF Laser Input Cathode () Laser Anode (+) 2 NC D2547P-Type Ther mistor Ther mistor Laser dc Bias (Cathode) () Back-facet Monitor Anode () Back-facet Monitor Cathode (+) TEC (+)1 TEC ()1 Case Ground
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 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* polarizationmaintaining 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.
6 7 8 9 10 11 12 13 14
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.
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Agere Systems Inc.
Data Sheet, Rev. 2 July 2001
Wavelength-Selected, High-Power D2587P-Type (with Wavelength Locker)/D2547P-Type Isolated DFB Laser Modules
Description (continued)
7 6 + 5 + 4 L1 140 nH TEC 3 TH 10 k 2 1
PACKAGE GROUNDS + 8 9 10 11
R1 20 12
ISOLATOR NC +
13
14
1-567
Top view.
Figure 2. D2547P Circuit Schematic
7 6 5 4 3 2 1
TEC RF C PDPOWER
RTH
PM FIBER PIGTAIL PDWAVE PDWAVE LD RR F
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9
10
11
12
13
14
1-1130(F)
Figure 3. D2587P Circuit Schematic
Block Diagram
LASER MODULE
DUAL ETALON DF B SILICON SUBMOUNT THERMISTOR THERMOELECTRIC COOLER
ISOLATOR AND FIBER COUPLING OPTICS
A TO D CONVERTER
EEPROM
SUGGESTED ELECTRONICS MODULE (CUSTOMER SUPPLIED)
MICROPROCESSOR
D TO A CONVERT E R
VOLTAGE PROPORTIONAL TO WAVELENGTH VOLTAGE PROPORTIONAL TO OPTICAL POWER VOLTAGE PROPORTIONAL TO TEMPERATURE
1-1129(F)
Agere Systems Inc.
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Wavelength-Selected, High-Power D2587P-Type (with Wavelength Locker)/D2547P-Type Isolated DFB Laser Modules
Data Sheet, Rev. 2 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 Laser Reverse Voltage dc Forward Current Operating Case Temperature Range Storage Case Temperature Range* Photodiode Reverse Voltage Photodiode Forward Current
* Does not apply to shipping container.
Symbol VRLMAX IFLMAX TC Tstg V RPDM AX IFPDMAX
Min -- -- 25 40 -- --
Ma x 2 225 70 70 10 2
Uni t V mA °C °C V 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.
Mounting Instructions
The minimum fiber bend radius is 1.0 in. (25.4 mm) To avoid degradation in performance, mount the module 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) 0.129 (3.28) R 0.041 (1.04)
1-532(C)
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 k, 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: Parameter Human-body Model Value >400 Unit V
0.118 (3.00) 0.086 (2.18)
Note: Dimensions are in inches and (millimeters).
Figure 4. Fillister Head Screw
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Agere Systems Inc.
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 Photodiode 1 Photodiode 2 Monitor Dark Current Input Impedance Filter Slope Frequency Capture Range S ymbol ITH -- VLF VRMON IRMON IPD1 IPD2 ID ZIN -- -- IF = 0, VRMON = 5 V -- -- Measured from ITU toward increasing and decreasing -- -- TL = 25 °C -- TL = 25 °C, TC = 70 °C TL = 25 °C, TC = 70 °C TC = 70 °C Test Conditions -- LF = 20 mW LF = 20 mW (CW) -- PO = 20 mW (CW) 0.003 0.003 0.003 -- -- 0.5 15 -- -- -- 0.01 25 -- -- 0.06 0.06 0.06 0.1 -- 8 -- mA mA mA µA /nm G Hz Min -- -- -- 3 Typ 15 -- 2 5 Max 40 165 2.5 10 Unit mA mA V V
Thermistor Current Resistance Ratio Thermistor Resistance Laser Submount Temperature TEC Current TEC Voltage TEC Capacity
ITC -- RTH TSET ITEC V TEC T
10 9.1 9.5 20 -- -- --
-- 9.6 -- -- -- --
100 10.1 10.5 35 1.7 2.8 50
µA -- k °C A V °C
* Standard 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 Peak Optical Output Power Center Wavelength* (See Ordering Information, page 9.) Line Width (3 dB full width) Side-mode Suppression Ratio Relative Intensity Noise Optical Isolation Optical Polarization Extinction Ratio FM Efficiency Wavelength Drift (EOL)
S ymbol PP C SMSR RIN -- -- FM C
Test Conditions -- TL = TSET C = ITU ± 0.1 nm CW, PF = 20.0 mW CW CW, PF = 20 mW 200 MHz < f < 10 GHz TC = 0 °C to 75 °C 0 °C to 75 °C fMOD = 30 kHz, PF = 20 mW Tested over 25-year lifetime
Min 20.0 1528.77 -- 35 -- 30 20 -- --
Typ -- -- 2 45 -- -- -- 100 --
Max -- 1610.06 10 -- 135 -- -- -- ±2.5
Unit mW nm M Hz dB dB/Hz dB dB MHz/mA 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.
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