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

Preliminary Data Sheet

March 2001

Features

Direct-modulated 1310 nm laser module character-
ized for use in 10 Gbits/s operations up to 12 km

Average optical output power, 3 dBm typical

Temperature stabilized with internal thermoelectric
cooler (TEC), enabling operation within a wide
temperature range of 5 °C to +80 °C

Hermetically sealed optics, isolator on TEC

GPO*

RF connector

Single-mode fiber pigtail

High relaxation frequency at low bias

Applications

SR-1

SONET/SDH low-cost metro applications

High-speed data communications

DWDM equipment drop-side applications

GPO

is a trademark of Gilbert Engineering Co., Inc.

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

SMF-28

single-mode fiber links. The 1310 nm

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.

SMF-28

is a trademark of Corning Incorporated.

Table 1. Pin Descriptions

Pin No.

Description

Thermistor

Laser Cathode (), dc Bias

MPD Anode, (Negative Bias MPD)

MPD Cathode

Thermoelectric Cooler (+)

Thermoelectric Cooler ()

ESD

PROTECTION

TEC

MATCH

10 k

@ 25 °C

ISOLATOR

RF CONNECTOR

MPD

DFB

CHOKE

1-1157(F)

Agere Systems Inc.

Preliminary Data Sheet

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

March 2001

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability. RF input shall be ac coupled. It is recommended that a series induc-
tor of 100

H be placed external to the device on Pin 3.

1. RF connector ac coupled.

Electrical/Optical Characteristics

1. 10 Gbits/s PRBS 2

1, E

= 8.2 dB, @ I

, T

= 25 °C, typical 50 mApp drive current.

2. Measurements made with 100

H in series with pin 3 (laser cathode).

Parameter

Symbol

Condition

Min

Max

Unit

Operating Temperature Range

Storage Case Temperature Range

Tstg

Laser Forward Bias

TEC On

150

Pin 3, Max Positive Voltage

Pin 3, Max Positive Current

200

Reverse Voltage Photodiode

RPD

TEC Current

TEC

1.7

Table 2. Electrical and Optical Characteristics (Case temperature, 5 °C to +80 °C; laser temperature, 25 °C

unless otherwise noted.)

Parameter

Symbol

Condition

Min

Typ

Max

Unit

Average Optical Output Power

OP =

+ 30 mA

5.5
0.28

--
--

1.5
0.71

dBm

Threshold Current (BOL)

Wavelength

1290

1320

Wavelength Tuning Coefficient

0.085

nm/°C

External Efficiency

9.4

23.8

mW/A

ac Side-mode Suppression Ratio

SMSR

Optical Isolation

High-frequency Cutoff (3 dB)

HIGH

GHz

Low-frequency Cutoff (3 dB)

LOW

kHz

RF Return Loss, 50

(0.1 GHz--8 GHz)

Rise/Fall Time, 10%--90%

Thermoelectric Cooler Current

TEC

1.3

Thermistor Resistance

9.5

10.5

Thermistor Coefficient

4.4

%/°C

Monitor Photodiode Current

MPD

1500

Agere Systems Inc.

Preliminary Data Sheet
March 2001

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

Characteristic Curve

Figure 2. Filtered Optical Eye Pattern (0 km, Fourth

Order Bessel Filter, 8.2 dB ER, 20 ps/div)

Outline Diagram

Dimensions are in inches and (millimeters).

* HYTREL

is a trademark of E. I. du Pont de Nemours and Company.

0.365

9.09)

(9.45

0.228

5.61)

(5.97

0.040

0.84)

(1.19

RF INPUT

GPO OR SMP

0.248

6.12)

(6.45

FIBER AND BEND LIMITER
MAINTAIN FIBER BEND RADIUS
GREATER THAN 1.5"

LIMITED DETENT

0.164 DIA

CONNECTOR

0.350

8.71)

(9.07

0.078

1.80)

(2.16

0.318

7.90)

(8.26

0.420

10.49)

(10.85

1.025

25.86)

(26.21

LEADS
0.008" THICK x 0.030" WIDE
0.400" MIN. LENGTH
6 SPCS @ 0.100" (0.254)

0.600

(15.00)

PIN 1

0.212

5.21)

(5.56

0.820

(20.80)

1.180

(30.00)

0.105 DIA
4 PLCS

0.500

12.52)

(12.88

0.250

6.17)

(6.53

0.190

4.65)

(5.00

0.048

1.04)

(1.40

0.215 ± 0.010

(5.50 ±0.30)

0.9 mm

HYTREL* TIGHT-BUFFERED JACKET

OVER ACRYLATE-COATED FIBER

1-1156(F)

Agere Systems Inc.

Preliminary Data Sheet

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

March 2001

Laser Safety Information

Class IIIb Laser Product

FDA/CDRH Class IIIb laser product. All versions are Class IIIb laser products per CDRH, 21 CFR 1040 Laser
Safety requirements. All versions are Class 3B laser products per

IEC

* 60825-1:1993. The device has been classi-

fied with the FDA under an accession number to be determined.

This product complies with 21 CFR 1040.10 and 1040.11.
SMF28 single-mode fiber pigtail and connector
Wavelength = 1.3

Maximum power = 30 mW

Because of size constraints, laser safety labeling (including an FDA Class IIIb label) is not affixed to the module but
attached to the outside of the shipping carton.

Product is not shipped with power supply.

Caution: Use of controls, adjustments, and procedures other than those specified herein may result in

hazardous laser radiation exposure.

IEC

is a registered trademark of The International Electrotechnical Commission.

DANGER

INVISIBLE LASER RADIATION
IS EMITTED FROM THE END
OF FIBER OR CONNECTOR

Avoid direct exposure to beam

Do not view beam directly with
optical instruments

INVISIBLE LASER RADIATION EMITTED FROM END OF FIBER OR CONNECTOR

Avoid exposure to beam
Class 3B Laser Product IEC-60825M 1993 Max. Output: 30 mW

Wavelength: 1.3

Agere Systems Inc.

Preliminary Data Sheet
March 2001

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

Ordering Information

1. Other options available. For additional ordering information, please contact an account manager at Opto West, Agere Systems Inc., 1-800-

362-3891 (for sales staff, please press option 2).

Table 3. Ordering Information

Device Code

Description

Connector

Pigtail

Comcode

D1861B023

10 Gbits/s DML,

1310 nm

FC/SPC

SMF-28

(1 m min)

TBD

D1861B040

10 Gbits/s DML,

1310 nm

SC/UPC

Standard

SMF-28

(1 m min)

TBD

D1861B050

10 Gbits/s DML,

1310 nm

SMF-28

(1 m min)

TBD

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