Datasheet A1751A62RRSC10, A1751A62RRSC06, A1751A62RRFC10, A1751A62RRFC08, A1751A62RRFC06 Datasheet (AGERE)

A1751A DWDM Analog
Forward-Path or Return-Path Laser Modules

Data Sheet, Rev. 4

June 2001

Features

■

Higher temperature rating

■

Excellent linearity

■

Standard ITU wavelengths

■

Advanced analog chip design

■

Tested for forward and return path applications

■

Reduces equipment requirements in the hub

■

Exceeds

Telcordia Technologies

* 468 specifica-

tion.

Applications

■

Node capability

■

Narrow transmitter housing

■

Networks with limited fiber

■

Architectures using separate optical wavelengths
to carry targeted services

*

Telcordia Technologies

is a trademark of Telcordia Technologies,

Inc.

Description

The A1751A laser module is a dense wavelength­division multiplexing (DWDM) laser for analog appli­cations. It features a distributed-feedback (DFB) chip
that has been designed specifically for radio fre­quency (RF) applications. The A1751A laser module
has a wide temperature range for reliable perfor­mance in harsh node environments and narrow
transmitter designs. It also features low adiabatic
chirp to maximize signal quality in short and long
lengths of fiber. The laser’s excellent inherent linear­ity minimizes degradation of the broadcast signals
caused by the quadrature amplitude modulation
(QAM) channels.

Wavelength-division multiplexing is being designed
into cable television architectures. DWDM, a method
for delivering targeted QAM signals to different loca­tions, allows multiple signal sets to be combined 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 broadcast analog
channels. The versatile A1751A DWDM laser module
reduces cable network architecture fiber needs and
lessens equipment requirements in the hub.

The A1751A is available in a wide range of standard
ITU wavelengths. The lasers are offered as either for­ward-path (40 MHz—860 MHz) or return-path
(5 MHz—210 MHz) modules.

2

A1751A DWDM Analog Data Sheet, Rev. 4
Forward-Path or Return-Path Laser Modules 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 abso­lute 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 device can withstand continuous exposure to the specified limits without damage.

Characteristics

1. Tested in a 50 Ω resistively matched system.

2. Eight channel loading with 10% OMI and 40 km fiber length.

3. Measured at 42 MHz.

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

5. Change in wavelength as case temperature is changed.

Parameter* Symbol Min Max Unit

Operating Case Temperature Range T

C

–40 85

°

C

Storage Temperature Range Tstg –40 85

°

C

Monitor Photodiode Reverse Voltage V

MPD

—10V

Laser Forward Current I

F

— 150 mA

Reverse Voltage (Laser) V

R

—2V

TEC Current I

TEC

—1.7A

RF Input Power P

RFIN

— 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
MHz

Frequency Response:

1

5 MHz—210 MHz
40 MHz—860 MHz

—I

F

= 60 mA,

T

OP

= 25 °C —

—

±0.5
±0.5

—
—

dB
dB

RF Return Loss:

1

5 MHz—210 MHz
40 MHz—860 MHz

RL

RF

IF = 60 mA,

—
—

>16
>16

—
—

dB
dB

Optical Output Power P

O

IF = I

OP

6, 8, or

10

——mW

Laser Relative Intensity

Noise

RIN I

F

= I

TH

+ 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 Wavelengths

λ

I

P

= IOP, T = T

OP

1527.94 — 1563.1 nm

Wavelength Drift

5

λ∆

I

F

= 60 mA,
T = T

OP,

T

C

varied from min—>max

— — 0.04 nm

Adiabatic Chirp FM I

F

= 60 mA,

T

OP

= 25 °C,

measured at 500 MHz

40 — 100 MHz/mA

Operating Case

Temperature Range

T

C

IF = I

OP

–40 — 85

°

C

3

Data Sheet, Rev. 4 A1751A DWDM Analog
June 2001 Forward-Path or Return-Path Laser Modules

Agere Systems Inc.

Characteristics

(continued)

1. Bias point at which all specifications apply.

2. For 10 mW output power. Minimum slope efficiency is lower f or lower-power lasers.

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

Electrical Schematics

Figure 1. A1751A Laser Schematic

Table 2. Additional Characteristics

Parameter Symbol Conditions Min Max Unit

Bias Current

1

I

B

BOL — 120 mA

Threshold Current I

TH

25 °C, BOL — 30 mA

Slope Efficiency

2

η I

P

= ITH + 20 and

I

TH

+ 60

0.10 — mW/mA

Monitor Photocurrent I

MON

IOP = 0 mA, VRM = 5 V,

T

OP

= 25 °C

10 200 µA/mW

Operating Chip Temperature

3

T

OP

IF = I

OP

18 35 °C

TEC Current I

TEC

–40 °C < T

C

< 85 °C,

T

OP

= 15 °C—35 °C,

I

F

= 60 mA

–1.5 1.5 A

TEC Voltage V

TEC

T

OP

= 15 °C—35 °C over T

C

–2.5 3.8 V

Thermistor Resistance R

TH

TOP = 25 °C — 10.5 kΩ

Optical Return Loss RL T

C

40 — dB

Side Mode Suppression Ratio SMSR I

F

= I

OP

30 — dB

1

2

3

4

5

6

7

14

13

12

11

10

9

8

CASE

GROUND

NC

(+)

(–)

(+)

(–)

TEC

(–)

(+)

CASE

GROUND

NC

ISOLATOR

(+)

1-1233(F)

4

A1751A DWDM Analog Data Sheet, Rev. 4
Forward-Path or Return-Path Laser Modules June 2001

Agere Systems Inc.

Electrical Schematics

(continued)

Figure 2. A1751A Circuit Schematic

1-1234(F)

1

2

3

4

5

6

7

14

13

12

11

10

9

8

THERMISTOR

TEC (–)

MPC CATHODE

NC

THERMISTOR

dc LASER

BIAS

MPD ANODE

CASE GROUND

TEC (+)

CASE
GROUND

CASE
GROUND

MPC CATHODENC

LASER
COMMON (+)

LASER
MODULATION (–)

LASER
COMMON (+)

39 nH

200

Ω

0.01 µf

3.3 µH

1000 pf

1000 pf

0.01 µf

0.01

µ

f

SEE

SEE

3A AND 3B

FIGURES

FIGURE 4

Figure 3a. Impedance-Matched Configuration

Figure 3b. Resistive-Matched Configuration

C7

1 pF—

0.01 µf 0.01 µf

VSWR

T1*

3:5

2
3

0.5 pF—2.5 pF

SEE PIN 12,
FIGURE 2

0.01 µf

FREQUENCY

RESPONSE

*T1 (75 Ω) 3:5

.

5 pF

1-1238F.a

SEE PIN 12,
FIGURE 2

37.5

Ω

R1

37.5

Ω

R2

1-1238F.b

5

Data Sheet, Rev. 4 A1751A DWDM Analog
June 2001 Forward-Path or Return-Path Laser Modules

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

J2

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

1

2

3

4

5

6

7

THERMISTOR

TEC (–)

MPC CATHODE

THERMISTOR

dc LASER

BIAS

MPD ANODE

CASE GROUND

TEC (+)

MPC CATHODE

39 nH

200

Ω

0.01 µf

3.3 µH

1000 pf

1000 pf

0.01 µf

0.01

µ

f

1-1238F.c

6

A1751A DWDM Analog Data Sheet, Rev. 4
Forward-Path or Return-Path Laser Modules 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 LENGTH
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

7

Data Sheet, Rev. 4 A1751A DWDM Analog
June 2001 Forward-Path or Return-Path Laser Modules

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 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.

Ordering Information

* For additional ordering information, please contact an Agere Systems at Opto West, 1-800-362-3891 (for sales staff, please press option 2).

Table 4. Ordering Information

*

Device Code Description Connector Comcode

A1751A

(See Ordering Code

Definitons, next page)

DWDM Analog Forward or Return

Path Laser Module

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 exposure to beam
Class 3B Laser Product IEC-60825M 1993 Max. Output: 30 mW Wavelength: 1.5 µm

8

A1751A DWDM Analog Data Sheet, Rev. 4
Forward-Path or Return-Path Laser Modules June 2001

Agere Systems Inc.

Ordering Information

(continued)

Ordering Code Definitions

Field Description

Family Nam e

Analog DWDM, DFB, Laser

Optical Connector

SC = SC/APC
FC = FC/APC
PG = None (No connector)

Optical Power

06 = 6 mw

A1751 19 FF FC 10

08 = 8 mw

10 = 10 mw

Frequency Channel

RR = Return path

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

Custom

00
01
02
03
04
05
06
07
08
09

NN = NPR
BB = Both FF and RR

YY

9

Data Sheet, Rev. 4 A1751A DWDM Analog
June 2001 Forward-Path or Return-Path Laser Modules

Agere Systems Inc.

Notes

For additional information, contact your Agere Systems Account Ma nager or the following:
INTERNET: http://www.agere.com
E-MAIL: [e-mail]
N. AMERICA: Agere Systems Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286

1-800-372-2447, FAX [phone] (In CANADA: 1-800-553-2448, FAX [phone])

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

Tel. [phone], FAX [phone]

CHINA: Agere Systems (Shanghai) Co., Ltd., 33/F Jin Mao Tower, 88 Century Boulevard Pudong, Shanghai 200121 PRC

Tel. [phone], FAX [phone]

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

Tel. [phone], FAX [phone]

EUROPE: Data Requests: DATALINE: Tel. [phone], FAX [phone]

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.

Copyright © 2001 Agere Systems Inc.
All Rights Reserved

June 2001
DS00-349OPTO-4 (Replaces DS00-349OPTO-3)

A1751A DWDM Analog Data Sheet, Rev. 4
Forward-Path or Return-Path Laser Modules June 2001