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D2547P33 Dataheets PDF



Part Number D2547P33
Manufacturers Agere Systems
Logo Agere Systems
Description Wavelength-Selected High-Power D2587P-Type (with Wavelength Locker)/D2547P-Type Isolated DFB Laser Modules
Datasheet D2547P33 DatasheetD2547P33 Datasheet (PDF)

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 Digital video s 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 e.

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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 Digital video s 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 s 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 s s s s s s 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 circuitry 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 Thermistor Laser dc Bias (Cathode) (–) Back-facet Monitor Anode (–) Back-facet Monitor Cathode (+) TEC (+)1 TEC (–)1 Case Ground λ Photodiode 2 Anode λ Photodiode 1 Anode Laser Anode (+) 2 RF Laser Input Cathode (–) Laser Anode (+) 2 NC D2547P-Type Thermistor Thermistor 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 Ω 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. 2 Agere Systems Inc. Data Sheet, Rev. 2 July 2001 Wavelength-Selected, High-Power D2587P-Type (with Wavelength Locker)/D254.


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