AGERE A1750A

Data Sheet, Rev. 4
June 2001
A1750A DWDM Analog
Forward-Path or Return-Path Laser Module
Description
The A1750A laser module is a dense wavelengthdivision multiplexing laser with a DFB chip designed
specifically for analog RF applications. The device
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 QAM channels.
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 specification.
Applications
■
Networks with limited fiber
■
Architectures using separate optical wavelengths
to carry targeted services
* Telcordia Technologies is a trademark of Telcordia Technologies
Inc.
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 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 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 forward-path (40 MHz–860 MHz) or return-path modules (5 MHz–210 MHz).
A1750A DWDM Analog
Forward-Path or Return-Path Laser Module
Data Sheet, Rev. 4
June 2001
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.
Parameter*
Operating Case Temperature Range
Storage Temperature Range
Monitor Photodiode Reverse Voltage
Laser Forward Current
Reverse Voltage (Laser)
TEC Current
RF Input Power
Symbol
Min
Max
Unit
TC
Tstg
VMPD
IF
VR
ITEC
PRFIN
–25
–40
—
—
—
–1.5
—
65
70
10
150
2
1.5
62
°C
°C
V
mA
V
A
dBm V
* The device can withstand continuous exposure to the specified limits without damage.
Characteristics
Table 1. Key Characteristics
Parameter
1
Frequency Range:
Return Path
Forward Path
Frequency Response:1
5 MHz—210 MHz
40 MHz—860 MHz
RF Return Loss:1
5 MHz—210 MHz
40 MHz—860 MHz
Optical Output Power
Laser Relative Intensity
Noise
Composite Second Order 2, 3
Composite Triple Beat 2, 4
Available Wavelengths5
Wavelength Drift6
Symbol
Conditions
F
—
|S21|
|S21|
IF = 60 mA,
TOP = 25 °C,
IF = 60 mA,
PO
IF = IOP
RIN
IF = ITH + 70 mA,
T = 25 °C
IF = IOP, OMI = 10%
IF = IOP, OMI = 10%
IP = IOP, T = TOP
IF = 60 mA,
T = TOP,
TC varied from min—>max
IF = 60 mA,
TOP = 25 °C,
measured at 500 MHz
IF = IOP
CSO
CTB
λ
∆λOP
Adiabatic Chirp
FM
Operating Case Temperature Range
TC
Min
Typ
Max
Unit
5
40
—
—
210
860
MHz
MHz
—
—
—
±0.5
±0.5
—
—
dB
dB
6, 8, or
10
—
>16
>16
—
—
—
—
dB
dB
mW
< –155
—
dB/Hz
—
—
1528
—
< –50
< –60
—
—
—
—
1563
0.04
dBc
dBc
nm
nm
40
—
100
MHz/mA
–20
—
65
°C
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 for other wavelengths.
6. Change in wavelength as case temperature is changed.
2
Agere Systems Inc.
Data Sheet, Rev. 4
June 2001
A1750A DWDM Analog
Forward-Path or Return-Path Laser Module
Characteristics (continued)
Table 2. Additional Characteristics
Parameter
1
Bias Current (Operating Current)
Threshold Current
Slope Efficiency2
Symbol
Conditions
Min
Max
Unit
IB
ITH
η
BOL
25 °C, BOL
IP = ITH + 20 and
ITH + 60
IOP = 0 mA, VRM = 5 V,
TOP = 25 °C
IF = IOP
–20 °C < TC < 65 °C,
TOP = 15 °C—35 °C,
IF = 60 mA
TOP = 15 °C—35 °C over TC
TOP = 25 °C
TC
IF = IOP
—
—
0.10
120
30
—
mA
mA
mW/mA
10
200
µA/mW
15
–1.5
35
1.5
°C
A
–2
9.5
40
30
2
10.5
—
—
V
kΩ
dB
dB
Monitor Photocurrent
IMON
Operating Chip Temperature3
TEC Current
TOP
ITEC
TEC Voltage
Thermistor Resistance
Optical Return Loss
Side Mode Suppression Ratio
VTEC
RTH
ORL
SMSR
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
1
14
ISOLATOR
NC
2
13
(+)
3
12
(–)
(–)
4
11
(+)
(+)
5
10
NC
(+)
6
(–)
7
TEC
CASE
GROUND
9
CASE
GROUND
8
1-1233F
Figure 1. A1750A Laser Schematic
Agere Systems Inc.
3
A1750A DWDM Analog
Forward-Path or Return-Path Laser Module
Data Sheet, Rev. 4
June 2001
Electrical Schematics (continued)
14
13
SEE
FIGURES
3A AND 3B
12
11
1
NC
THERMISTOR
LASER
COMMON (+)
THERMISTOR
2
dc LASER
BIAS
3
MPD ANODE
CASE GROUND
4
LASER
MODULATION (–)
LASER
COMMON (+)
10
8
0.01 µf
200 Ω
3.3 µH
1000 pf
5
SEE
FIGURE 4
MPC CATHODE
NC
9
39 nH
1000 pf
6
CASE
GROUND
TEC (+)
CASE
GROUND
TEC (–)
0.01 µf
7
0.01 µf
1-1238F
Figure 2. A1750A Circuit Schematic
0.01 µf
C7
R1
37.5 Ω
SEE PIN 12,
FIGURE 2
3:5
T1*
2
3
SEE PIN 12,
FIGURE 2
R2
37.5 Ω
0.5 pF—2.5 pF
VSWR
1 pF—
5 pF
0.01 µf
1-1238F.b
Figure 3b. Resistive-Matched Configuration
0.01 µf
FREQUENCY
RESPONSE
* T1 (75 Ω) 3:5.
1-1238a(F)
Figure 3a. Impedance-Matched Configuration
4
Agere Systems Inc.
Data Sheet, Rev. 4
June 2001
A1750A DWDM Analog
Forward-Path or Return-Path Laser Module
Electrical Schematics (continued)
TEC
CONSTANT
ALARM
1
THERMISTOR
J2
2
THERMISTOR
0.01 µf
39 nH
dc LASER
BIAS
3
MPD ANODE
CASE GROUND
4
3.3 µH
200 Ω
1000 pf
5
MPC CATHODE
1000 pf
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
6
TEC (+)
0.01 µf
7
TEC (–)
0.01 µf
1-1238F.c
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)
Agere Systems Inc.
5
A1750A DWDM Analog
Forward-Path or Return-Path Laser Module
Data Sheet, Rev. 4
June 2001
Outline Diagram
Dimensions are in inches and (millimeters).
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)
LOCATION FOR LABEL
INCLUDING SERIAL NUMBER
AND DATE CODE
(LABEL NOT SHOWN)
0.213
(5.4)
0.049
(1.2)
0.500
(12.7)
0.250
(6.4)
0.350
(8.9)
0.190 ± 0.03
(5.0 ± 0.8)
4 x ø 0.105 (2.7)
0.078
(2.0)
0.820
(20.8)
1.025
(26.0)
1.180
(30.0)
0.700 ± 0.03
(18.0 ± 0.8)
0.365
(9.3) 0.215 ± 0.01
(5.5 ± 0.25)
0.248
(6.3)
0.040
(1.0)
1-1179.(F)a
Pin Information
Table 3. Pin Descriptions
6
Pin No.
Description
1
Thermistor
2
3
4
5
6
7
8
9
10
11
12
13
14
Thermistor
dc Laser Bias (–)
MPD Anode, Case Ground
MPD Cathode
Thermoelectric Cooler (+)
Thermoelectric Cooler (–)
Case Ground
Case Ground
NC
Laser Common (+)
Laser Modulation (–)
Laser Common (+)
NC
Agere Systems Inc.
Data Sheet, Rev. 4
June 2001
A1750A DWDM Analog
Forward-Path or Return-Path Laser Module
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 classified 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.
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
Ordering Information
Table 4. Ordering Information*
Device Code
Description
Connector
Comcode
A1750A
(See Device Code Definitions,
next page.)
DWDM Forward- or Return-Path
Laser Modules
SC/APC standard;
FC/APC available
TBD
* For additional ordering information, please contact an Agere Systems account manager at Opto West, 1-800-362-3891 (for sales staff, please
press option 2).
Agere Systems Inc.
7
A1750A DWDM Analog
Forward-Path or Return-Path Laser Module
Data Sheet, Rev. 4
June 2001
Ordering Information (continued)
Ordering Code Definitions
A1750 19 FF FC
10
Field Description
Family Name
Analog DWDM, DFB, Laser
Wavelength
19 = ch. 19
21 = ch. 21
23 = ch. 23
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
62 = ch. 62
Frequency Channel
FF = Forward path
RR = Return path
BB = Both FF and RR
Optical Connector
SC = SC/APC
FC = FC/APC
PG = None (No connector)
Optical Power
06 = 6 mw
08 = 8 mw
10 = 10 mw
For additional information, contact your Agere Systems Account Manager or the following:
INTERNET:
http://www.agere.com
E-MAIL:
docmaster@micro.lucent.com
N. AMERICA: Agere Systems Inc., 555 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 Singapore 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., Ltd., 33/F Jin Mao Tower, 88 Century Boulevard Pudong, Shanghai 200121 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.
Copyright © 2001 Agere Systems Inc.
All Rights Reserved
June 2001
DS00-284OPTO-4 (Replaces DS00-284OPTO-3)