D2555G56 판매점 - D2570/ D2526/ D2555 Wavelength-Selected Direct Modulated Isolated DFB Laser Module

D2555G56 반도체 회로 부품 판매점

D2570/ D2526/ D2555 Wavelength-Selected Direct Modulated Isolated DFB Laser Module

Agere Systems

Data Sheet, Rev. 3

July 2001

D2570, D2526, D2555 Wavelength-Selected

Direct Modulated Isolated DFB Laser Module

Applications

s Three direct-modulated DWDM families available

to meet a number of OC-48/STM-16 applications:

— Extended reach (100 km)

— Very long reach (170 km)

— Metro DWDM

— Digital video

Product Codes

The 1.5 µm D2570, D2526G, and D2555 Laser Modules are

available in a 14-pin, hermetic, butterfly package.

Features

s ITU wavelengths available from

1528.77 nm —1610.06 nm

s SONET/SDH compatible up to OC-48/STM-16

s Temperature tunable for precise wavelength

selection

s Integrated optical isolator

s High-performance, multiquantum well (MQW)

distributed-feedback (DFB) laser

s Industry-standard, 14-pin butterfly package

s Characterized at 2.488 Gbits/s (NRZ)

s InGaAs, PIN photodetector back-facet monitor

s Low threshold current

s High-reliability, hermetic packaging

s Excellent long-term wavelength stability can elimi-

nate the need for external wavelength locker

s Qualified to meet the intent of Telcordia Technolo-

gies * 468

* Telcordia Technologies is a trademark of Telcordia Technologies,

Inc.

Product

Code

D2570H

D2526G

D2555G

Peak

Power

10 mW

2 mW

Dispersion

Performance

1800 ps/nm (100 km)

3000 ps/nm (170 km)

Description

The Direct Modulated Isolated DFB Laser Module

contains an internally cooled, InGaAs, MQW, distrib-

uted-feedback (DFB) laser designed for 1.5 µm appli-

cations. The following three direct-modulation DWDM

product families have been established to meet vari-

ous OC-48/STM-16 system applications:

s D2526-type: designed to be used in OC-48/

STM-16 (2.488 Gbits/s) for extended reach, dense

WDM applications (1800 ps/nm). The wavelength

of the laser can be temperature-tuned for precise

wavelength selection by adjusting the temperature

of the internal thermoelectric cooler.

s D2555-type: high-performance device designed for

very low dispersion; used in fiber spans exceeding

170 km (3000 ps/nm).

s D2570-type: high-power, direct-modulated laser

eliminates the need for optical amplifiers in DWDM

many applications.

D2570, D2526G, D2555 Wavelength-Selected

Direct Modulated Isolated DFB Laser Module

Data Sheet, Rev. 3

July 2001

Description (continued)

Pin Information

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.

Controlled Temperature

An integral thermoelectric cooler (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 –40 °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.

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 con-

junction 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, which separates the dc-bias path from the RF

input. The RF input has a nominal 25 Ω impedance.

The laser module is equipped with SMF-28 * type fiber.

The fiber has a 900 µm tight buffer jacket. Various con-

nectors and pigtail lengths are available.

Agere Systems’ optoelectronic components are being

qualified to rigorous internal standards that are consis-

tent 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.

Pin Name

1 Thermistor

2 Thermistor

3 Laser dc Bias (Cathode) (–)

4 Back-facet Monitor Anode (–)

5 Back-facet Monitor Cathode (+)

6 Thermoelectric Cooler (+)*

7 Thermoelectric Cooler (–)†

8 Case Ground

9 Case Ground

10 Case Ground

11 Laser Anode (+)†

12 RF Laser Input Cathode (–)

13 Laser Anode (+)†

14 Case Ground

* A positive current through the thermoelectric heat pump cools the

laser.

† Both leads should be grounded for optimum performance.

–+

TEC

+–

–

160 nH

10 kΩ

PACKAGE

GROUNDS

Top view.

ISOLATOR

20 Ω

–+

12 13

Figure 1. Circuit Schematic

1-567F.b

* ISO is a registered trademark of The International Organization for

Standardization.

† SMF-28 is a trademark of Corning Inc.

2 Agere Systems Inc.

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D2555G56 반도체 회로 부품 판매점

D2570/ D2526/ D2555 Wavelength-Selected Direct Modulated Isolated DFB Laser Module

국내 전력반도체 판매점

일반적인 전자부품 판매점

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