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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. 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).
Features
s s s s s s s
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
s s
Networks with limited fiber Architectures using separate optical wavelengths to carry targeted services
* Telcordia Technologies is a trademark of Telcordia Technologies Inc.
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 TC Tstg VMPD IF VR ITEC PRFIN Min -25 -40 -- -- -- -1.5 -- Max 65 70 10 150 2 1.5 62 Unit 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 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
1
Symbol F
Conditions --
Min 5 40
Typ -- -- 0.5 0.5 >16 >16 -- < -155 < -50 < -60 -- --
Max 210 860 -- -- -- -- -- -- -- -- 1563 0.04
Unit MHz MHz dB dB dB dB mW dB/Hz dBc dBc nm nm
|S21|
IF = 60 mA, TOP = 25 C, IF = 60 mA,
|S21|
-- -- --
PO RIN CSO CTB OP
IF = IOP 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
6, 8, or 10 -- -- -- 1528 --
Adiabatic Chirp
FM
40
--
100
MHz/mA
Operating Case Temperature Range
TC
-20
--
65
C
1. Tested in a 50 system with 27 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.
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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 Bias Current (Operating Current) Threshold Current Slope Efficiency2 Monitor Photocurrent Operating Chip Temperature3 TEC Current
1
Symbol IB ITH IMON TOP ITEC
Conditions 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
Min -- -- 0.10 10 15 -1.5
Max 120 30 -- 200 35 1.5
Unit mA mA mW/mA A/mW C A
TEC Voltage Thermistor Resistance Optical Return Loss Side Mode Suppression Ratio
VTEC RTH ORL SMSR
-2 9.5 40 30
2 10.5 -- --
V k dB dB
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 ISOLATOR 2 NC
14
13
(+)
3
12
(-)
(-)
4
11
(+)
(+)
5 NC
10
(+)
6
CASE GROUND CASE GROUND
9
(-)
7 TEC
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 NC 13 LASER COMMON (+) LASER MODULATION (-) LASER COMMON (+) THERMISTOR
1
2 THERMISTOR 3 200 4 SEE FIGURE 4 3.3 H 39 nH 0.01 f
SEE FIGURES 3A AND 3B
12
dc LASER BIAS MPD ANODE CASE GROUND
11
10 NC 9 MPC CATHODE
5
1000 pf
CASE GROUND CASE GROUND
6 TEC (+) 7 TEC (-) 0.01 f 0.01 f
1000 pf
8
1-1238F
Figure 2. A1750A Circuit Schematic
0.01 f C7 3:5 T1* 2 3 SEE PIN 12, FIGURE 2 0.5 pF--2.5 pF VSWR
R1 37.5
SEE PIN 12, FIGURE 2 R2 37.5
1-1238F.b
1 pF-- 5 pF FREQUENCY RESPONSE * T1 (75 ) 3:5.
0.01 f
0.01 f
Figure 3b. Resistive-Matched Configuration
1-1238a(F)
Figure 3a. Impedance-Matched Configuration
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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 2 THERMISTOR 3 200 4 1000 pf 5 MPC CATHODE 1000 pf 6 TEC (+) 0.01 f 7 TEC (-) 0.01 f
1-1238F.c
J2
39 nH 0.01 f
dc LASER BIAS MPD ANODE CASE GROUND
3.3 H
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
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) 0.213 (5.4)
LOCATION FOR LABEL INCLUDING SERIAL NUMBER AND DATE CODE (LABEL NOT SHOWN) 0.049 (1.2)
0.500 (12.7)
0.350 (8.9)
0.250 (6.4)
4 x o 0.105 (2.7)
0.190 0.03 (5.0 0.8)
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) 0.040 (1.0)
0.248 (6.3)
1-1179.(F)a
Pin Information
Table 3. Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 6 Description Thermistor 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 m 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 m
Ordering Information
Table 4. Ordering Information* Device Code A1750A (See Device Code Definitions, next page.) Description DWDM Forward- or Return-Path Laser Modules Connector SC/APC standard; FC/APC available Comcode 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 (c) 2001 Agere Systems Inc. All Rights Reserved
June 2001 DS00-284OPTO-4 (Replaces DS00-284OPTO-3)

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