D1861B 10 Gbits/s 1310 nm DML Module (–3 dBm)

Preliminary Data Sheet

March 2001

Features

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Direct-modulated 1310 nm laser module character-

ized for use in 10 Gbits/s operations up to 12 km

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Average optical output power, –3 dBm typical

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Temperature stabilized with internal thermoelectric

cooler (TEC), enabling operation within a wide

temperature range of –5 °C to +80 °C

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Hermetically sealed optics, isolator on TEC

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Single-mode fiber pigtail

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High relaxation frequency at low bias

Applications

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SR-1

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SONET/SDH low-cost metro applications

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High-speed data communications

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DWDM equipment drop-side applications

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Description

The D1861B direct-modulated laser (DML) module is

a cost-effective solution for 10 Gbits/s digital trans-

mission up to 12 km using traditional intracity

wavelength eliminates the need for concern about

dispersion control over most installed intracity fiber

plants. The package contains a high-speed DFB

laser chip, thermoelectric cooler, thermistor, optical

isolator, and a rear-facet monitor photodiode, which

allows for external optical power control.

Figure 1. D1861B DML Electrical Schematic

Pin Information

1. Laser anode is case ground mAp-p drive current.

2. A positive current into this pin cools the laser.

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Table 1. Pin Descriptions

Pin No.

Description

1Thermistor

2Thermistor

3

4

MPD Anode, (Negative Bias MPD)

5

MPD Cathode

6

7

Thermoelectric Cooler (–)

ESD

PROTECTION

TEC

76

54

3

2

1

–

––

+

+

RF

45

Ω

10 k

Ω @ 25 °C

ISOLATOR

RF CONNECTOR

MPD

DFB

CHOKE

1-1157(F)