A1750A42RRFC06 - Agere Systems, Inc.

A1750A DWDM Analog

Forward-Path or Return-Path Laser Module

Data Sheet, Rev. 4

June 2001

Features

■Low adiabatic chirp

■Excellent linearity

■Standard ITU wavelengths

■Advanced analog chip design

■Tested for forward-path or return-path applications

■Reduces equipment requirements in the hub

■Exceeds

Telcordia Technologies

* 468 specifica-

tion.

Applications

■Networks with limited fiber

■Architectures using separate optical wavelengths

to carry targeted services

Telcordia Tech nologies

is a trademark of Telcordia Technologies

Inc.

Description

The A1750A laser module is a dense wavelength-

division multiplexing laser with a DFB chip designed

specifically for analog RF applications. The device

features low adiabatic chirp to maximize signal qual-

ity in short and long lengths of fiber. The laser’s

excellent inherent linearity minimizes degradation of

the broadcast signals caused by the QAM channels.

Wavelength-division multiplexing (WDM) has gained

widespread acceptance in the telecommunications

market and is being designed into emerging cable

television network architectures. Dense WDM, a

method for delivering targeted QAM signals to differ-

ent locations, allows multiple signal sets to be com-

bined onto a single strand of fiber for transmission

from a headend to a hub. At the hub, individual QAM

signals can be selected and combined with broad-

cast analog channels. The A1750A DWDM laser

module reduces cable network architecture fiber

requirements and lessen equipment requirements in

the hub.

The A1750A is available at a variety of standard ITU

wavelengths. The lasers are offered as either for-

ward-path (40 MHz–860 MHz) or return-path mod-

ules (5 MHz–210 MHz).

A1750A DWDM Ana log Data Sheet, Rev. 4

Forward-Path or Return-Path Laser Module June 2001

Agere Systems Inc.

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.

* The devi ce can withstand continuous exposure to the specified limits without damage.

Characteristics

1. Tested in a 50 Ω system with 27 Ω series matching resistor.

2. Eight-channel loading, 10% OMI, 40 km fiber.

3. Measured at 42 MHz.

4. Measured at 553.25 MHz, 577.25 MHz. and 595.25 MHz.

5. Consult an Agere Systems account manager f or other wavelengths.

6. Change in wavelength as case temperature is changed.

Parameter* Symbol Min Max Unit

Operating Case Temperature Range TC–25 65 °C

Storage Temperature Range Tstg –40 70 °C

Monitor Photodiode Reverse Voltage VMPD —10V

Lase r Forward Current IF— 150 mA

Reverse Voltage (Laser) VR—2V

TEC Current ITEC –1.5 1.5 A

RF Input Power PRFIN — 62 dBm V

Table 1. Key Characteristics

Parameter Symbol Conditions Min Typ Max Unit

Frequency Range:1

Return Path

Forward Path

F — 5

40 —

—210

860 MHz

MHz

Frequency Response:1

5 MHz—210 MHz

40 MHz—860 MHz

|S21| IF = 60 mA,

TOP = 25 °C, —

—±0.5

±0.5 —

—dB

RF Return Loss:1

5 MHz—210 MHz

40 MHz—860 MHz

|S21| IF = 60 mA, — >16

>16 —

—dB

Optic al Output Power POIF = IOP 6, 8, or

10 ——mW

Laser Relative Intensity

Noise RIN IF = ITH + 70 mA,

T = 25 °C —< –155 — dB/Hz

Composite Second Order 2, 3 CSO IF = IOP

, OMI = 10% — < –50 — dBc

Composite Triple Beat 2, 4 CTB IF = IOP

, OMI = 10% — < –60 — dBc

Available Wavelengths5λIP = IOP

, T = TOP 1528 — 1563 nm

Wavelength Drift6∆λOP I

F = 60 mA,

T = TOP,

TC varied from min—>max

— — 0.04 nm

Adiabatic Chirp FM IF = 60 mA,

TOP = 25 °C,

measured at 500 MHz

40 — 100 MHz/mA

Operatin g Case Tempera-

ture Range TCIF = IOP –20 — 65 °C

Data Sheet, Rev. 4 A1750A DWDM Analog

June 2001 Forward-Path or Return-Path Laser Module

Agere Systems Inc.

Characteristics (continued)

1. Bias point at which all specifications apply.

2. For 10 mW output power. Minimum slope efficiency is lower for lower power lasers.

3. Chip temperature at which wavelength specification is met. Operating chip temperature is reported for each laser.

Electrical Schematics

Figure 1. A1750A Laser Schematic

Table 2. Additional Characteristics

Parameter Symbol Conditions Min Max Unit

Bias Current1 (Operating Current) IBBOL — 120 mA

Threshold Current ITH 25 °C, BOL — 30 mA

Slope Effi c ien cy2ηIP = ITH + 20 and

ITH + 60 0.10 — mW/mA

Monitor Photocurrent IMON IOP = 0 mA, VRM = 5 V,

TOP = 25 °C 10 200 µA/mW

Operating Chip Temperature3TOP IF = IOP 15 35 °C

TEC Current ITEC –20 °C < TC < 65 °C,

TOP = 15 °C—35 °C,

IF = 60 mA

–1.5 1.5 A

TEC Voltage VTEC TOP = 15 °C—35 °C over TC–2 2 V

Thermistor Resistance RTH TOP = 25 °C 9.5 10.5 kΩ

Optical Return Loss ORL TC40 — dB

Side Mode Suppression Ratio SMSR IF = IOP 30 — dB

CASE

GROUND

(+)

(–)

(+)

(–)

TEC

(–)

(+)

CASE

GROUND

ISOLATOR

(+)

1-1233F

A1750A DWDM Ana log Data Sheet, Rev. 4

Forward-Path or Return-Path Laser Module June 2001

Agere Systems Inc.

Electrical Schematics (continued)

Figure 2. A1750A Circuit Schematic

THERMISTOR

TEC (–)

MPC CATHODE

THERMISTOR

dc LASER

BIAS

MPD ANODE

CASE GR OUND

TEC (+)

CASE

GROUND

CASE

GROUND

MPC CATHODENC

LASER

COMMON (+)

LASER

MODULATION (–)

LASER

COMMON (+) 39 nH

200

Ω

0.01

3.3

1000 pf

0.01

SEE

3A AND 3B

FIGURES

FIGURE 4

1-1238F

Figure 3a. Impedance-Matched Configuration

Figure 3b. Resistive-Matched Configuration

1 pF— 0.01 µf0.01 µf

VSWR

T1*

3:5

0.5 pF—2.5 pF

SEE PI N 12,

FIGURE 2

0.01 µf

FREQUENCY

RESPONSE

* T1 (75 Ω) 3:5.

5 pF

1-1238a(F)

SEE PIN 12,

FIGURE 2

37.5 Ω

1-1238F.b

Data Sheet, Rev. 4 A1750A DWDM Analog

June 2001 Forward-Path or Return-Path Laser Module

Agere Systems Inc.

Electrical Schematics (continued)

Note: When ordering the dc set, the following boards are included: alarm board, 9108-004; TEC board, 9028-004; constant current, 9383-004.

Figure 4. dc Set (Agere Systems-Supplied Option)

CONSTANT ALARM

TEC

1 THERMISTOR

2 THERMISTOR

3 dc LASER BIAS

4 MPD ANODE (CASE GROUND)

5 MPC CATHODE

6 TEC (+)

7 TEC (–)

8 GND

9 GND

10 GND

THERMISTOR

TEC (–)

MPC CATHO D E

THERMISTOR

dc LASER

BIAS

MPD ANODE

CASE GROUND

TEC (+)

MPC CATHO D E

39 nH

200

Ω

0.01

3.3

1000 pf

0.01

1-1238F.c

A1750A DWDM Ana log Data Sheet, Rev. 4

Forward-Path or Return-Path Laser Module June 2001

Agere Systems Inc.

Outline Diagram

Dimensions are in inches and (millimeters).

Pin Information

Table 3. Pin Descriptions

Pin No. Description

1Thermistor

2Thermistor

3 dc Laser Bias (–)

4 MPD Anode, Case Ground

5 MPD Cathode

6 Thermoelectric Cooler (+)

7 Thermoelectric Cooler (–)

8 Case Ground

9 Case Ground

10 NC

11 Laser Common (+)

12 Laser Modulation (–)

13 Laser Common (+)

14 NC

LOCATION FOR LABEL

INCLUDING SERIAL NUMBER

AND DATE CODE

(LABEL NOT SHOWN)

0.049

(1.2)

4 x ø 0.105 (2.7)

0.213

(5.4)

PIN 1

LEADS

0.030 (0.8) WIDE x 0.008 (0.2) THICK

0.120 (3.0) MINIMUM LEN GTH

6 SPCS @ 0.100 (2.5)

0.250

(6.4)

0.190 ± 0.03

(5.0 ± 0.8)

0.078

(2.0)

0.215 ± 0.01

(5.5 ± 0.25) 0.248

(6.3)

0.040

(1.0)

0.350

(8.9)

0.500

(12.7)

0.820

(20.8)

1.025

(26.0)

1.180

(30.0)

0.365

(9.3)

0.700 ± 0.03

(18.0 ± 0.8)

1-1179.(F)a

Data Sheet, Rev. 4 A1750A DWDM Analog

June 2001 Forward-Path or Return-Path Laser Module

Agere Systems Inc.

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.

Single-mode fiber pigtail with SC/APC connectors (standard)

Wavelength = 1.5 µm

Maximum power = 30 mW

Because of size constraints, laser saf ety labeling (including an FD A 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 pr oced ures other than those specified herein may result in

hazardous laser radiation exposure.

IEC

is a registered trademark of The International Electrotechnical Commission.

Ordering Information

* F or additional ordering information, please contact an Agere Systems account manager at Opto West, 1-800-362-3891 (f or sales staff, please

press option 2).

Table 4. Ordering Information*

Device Code Description Connector Comcode

A1750A

(See Device Code Definitions,

next page.)

DWDM Forward- or Return-Path

Lase r Module s SC/APC standard;

FC/APC available TBD

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 ex posure to beam

Class 3B Laser Product IEC-60825M 1993 Max. Out pu t: 30 mW Wave leng th: 1.5

For additional information, contact your Agere Syste ms Accou nt Ma na ger or the following:

INTERNET: http://www.agere.com

E-MAIL: docmaster@micro.lucent.com

N. AMERICA:Agere Systems Inc., 5 55 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109 -3286

1-800-372-2447, FAX 610-712-4106 ( In CANADA: 1-800-553-2448, FAX 610-712-4106)

ASIA PACIFIC:Agere Systems Si ngapore Pte. Ltd., 77 Science Park Drive, #03-18 Cintech III, Singapore 118256

Tel. (65) 778 8833, FAX (65) 777 7495

CHINA: Agere Systems (Shanghai) Co., L td., 33/F Jin Mao Tower, 88 Century Boulevard Pudong, Sha ng hai 2 00 121 PRC

Tel. (86) 21 50471212, FAX (86) 21 50472266

JAPAN: Agere Systems Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan

Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700

EUROPE: Data Requests: DATALINE: Tel. (44) 7000 582 368, FAX (44) 1189 328 148

Technical Inquiries:OPTOELECTRONICS MARKETING: (44) 1344 865 900 (Ascot UK)

Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application.

June 2001

DS00-284OPTO-4 (Replaces DS00-284OPTO-3)

A1750A DWDM Analog Data Sheet, Rev. 4

Forward-Path or Return-Path Laser Module June 2001

Ordering Information (continued)

Ordering Code Definitions

Field Description

Family Name

Analog DWDM, DFB, Laser

Optical Connector

SC = SC/APC

FC = FC/APC

PG = None (No connector)

Optical Power

06 = 6 mw

A175019FFFC 10

08 = 8 mw

10 = 10 mw

Frequency Channel

RR = Return path

BB = Both FF and RR

FF = Forward path

Wavelength

21 = ch. 21

25 = ch. 25

27 = ch. 27

29 = ch. 29

31 = ch. 31

33 = ch. 33

35 = ch. 35

37 = ch. 37

39 = ch. 39

41 = ch. 41

43 = ch. 43

45 = ch. 45

47 = ch. 47

49 = ch. 49

51 = ch. 51

53 = ch. 53

55 = ch. 55

57 = ch. 57

59 = ch. 59

61 = ch. 61

20 = ch. 20

22 = ch. 22

24 = ch. 24

26 = ch. 26

28 = ch. 28

30 = ch. 30

32 = ch. 32

34 = ch. 34

36 = ch. 36

38 = ch. 38

40 = ch. 40

42 = ch. 42

44 = ch. 44

46 = ch. 46

48 = ch. 48

50 = ch. 50

52 = ch. 52

54 = ch. 54

56 = ch. 56

58 = ch. 58

60 = ch. 60

19 = ch. 19

23 = ch. 23

62 = ch. 62