Data Sheet, Rev. 4 June 2001 A1751A DWDM Analog Forward-Path or Return-Path Laser Modules 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. 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 specification. 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. 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. A1751A DWDM Analog Forward-Path or Return-Path Laser Modules 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 –40 –40 — — — — — 85 85 10 150 2 1.7 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 Wavelengths Wavelength Drift 5 Symbol Conditions F — — RLRF IF = 60 mA, TOP = 25 °C 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 Adiabatic Chirp FM Operating Case Temperature Range TC Typ Max Unit 5 40 — — 210 860 MHz MHz MHz — — ±0.5 ±0.5 — — dB dB — — 6, 8, or 10 — >16 >16 — — — — dB dB mW < –155 — dB/Hz — — 1527.94 — — — — — –50 –60 1563.1 0.04 dBc dBc nm nm 40 — 100 MHz/mA –40 — 85 °C IF = 60 mA, PO CSO CTB λ λ∆ Min 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. 2 Agere Systems Inc. Data Sheet, Rev. 4 June 2001 A1751A DWDM Analog Forward-Path or Return-Path Laser Modules Characteristics (continued) Table 2. Additional Characteristics Parameter Symbol Conditions Min Max Unit IB BOL 25 °C, BOL IP = ITH + 20 and ITH + 60 IOP = 0 mA, VRM = 5 V, TOP = 25 °C IF = IOP –40 °C < TC < 85 °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 18 –1.5 35 1.5 °C A –2.5 — 40 30 3.8 10.5 — — V kΩ dB dB 1 Bias Current Threshold Current Slope Efficiency2 ITH η Monitor Photocurrent IMON Operating Chip Temperature3 TEC Current TOP ITEC TEC Voltage Thermistor Resistance Optical Return Loss Side Mode Suppression Ratio VTEC RTH RL 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 1-1233(F) Figure 1. A1751A Laser Schematic Agere Systems Inc. 3 A1751A DWDM Analog Forward-Path or Return-Path Laser Modules 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 1-1234(F) Figure 2. A1751A Circuit Schematic R1 37.5 Ω 0.01 µf C7 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 1-1238F.b VSWR Figure 3b. Resistive-Matched Configuration 1 pF— 5 pF 0.01 µf 0.01 µf FREQUENCY RESPONSE *T1 (75 Ω) 3:5. 1-1238F.a Figure 3a. Impedance-Matched Configuration 4 Agere Systems Inc. Data Sheet, Rev. 4 June 2001 A1751A DWDM Analog Forward-Path or Return-Path Laser Modules 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 A1751A DWDM Analog Forward-Path or Return-Path Laser Modules 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 A1751A DWDM Analog Forward-Path or Return-Path Laser Modules 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 A1751A (See Ordering Code Definitons, next page) DWDM Analog Forward or Return Path Laser Module SC/APC standard; FC/APC available TBD * For additional ordering information, please contact an Agere Systems at Opto West, 1-800-362-3891 (for sales staff, please press option 2). Agere Systems Inc. 7 A1751A DWDM Analog Forward-Path or Return-Path Laser Modules Data Sheet, Rev. 4 June 2001 Ordering Information (continued) Ordering Code Definitions A1751 19 FF FC 10 YY 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 NN = NPR 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 Custom 00 01 02 03 04 05 06 07 08 09 8 Agere Systems Inc. Data Sheet, Rev. 4 June 2001 A1751A DWDM Analog Forward-Path or Return-Path Laser Modules Notes Agere Systems Inc. 9 A1751A DWDM Analog Forward-Path or Return-Path Laser Modules Data Sheet, Rev. 4 June 2001 For additional information, contact your Agere Systems Account Manager or the following: INTERNET: http://www.agere.com E-MAIL: [email protected] 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 DS00-349OPTO-4 (Replaces DS00-349OPTO-3)