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| 2.488 Gb/s DFB Laser Module with Integral Optical Isolator Technical Data LSC2500 Features * Center Wavelength Between 1535 nm and 1565 nm * Modulation Capability up to 2.488 Gb/s * 30 dB Internal Optical Isolation * 25 Impedance Matched * Wide Operating Temperature Range: -20C to +65C * Industry Standard Hermetic 14 PIN Butterfly Package Description LSC2500 laser modules are highly reliable fiber optic light sources operating in the 1550 nanometer band. The internal DFB lasers are based upon InGaAs ridge waveguide Multi Quantum Well technology and fabricated by the Metal Organic Vapor Phase Epitaxy (MOVPE) process, resulting in long lifetimes and modest threshold currents. The LSC2500 package includes a photodiode for monitoring the laser output, a thermistor for monitoring laser heatsink temperature, and a Peltier effect thermoelectric cooler (TEC). A Applications * * * * Telecommunications Fiber Optic Sensors Cable Television Military Communications and Control Systems * Instrumentation heatsink mounting flange is incorporated into the industry standard 14 PIN package. The LSC2500 also has 30 dB of optical isolation which is temperature controlled to maintain isolation over the full operating temperature range. Laser Safety Warning This device is a Class IIIb (3b) Laser Product. It may emit invisible laser radiation if operated with the fiber pigtail disconnected. To avoid possible eye damage do not look into an unconnected fiber pigtail during laser operation. Do not exceed specified operating limits. 5965-8213E (4/97) 559 LSC2500 Mechanical Outline Top View A S B T U R DIM. A B C D E F G H I J K L M N P R S T U V MIN. 29.6 20.6 12.45 8.4 - - 5.40 - - - - - 1500.00 - 4.5 8.8 25.9 2.50 - - NOM. MAX. - - - - 0.75 12.0 - 2.54 0.50 0.20 7.0 30.0 - 2.0 - - - - 0.75 17.8 30.4 21.1 12.95 9.0 - - 5.90 - - - - - - - 6.5 9.0 26.1 2.70 - - I H C Back View F J M ALL DIMENSIONS IN MILLIMETERS N Side View K L D G E V P LSC2500 Pin Connections and Block Diagram Top View 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PIN CONNECTIONS THERMISTOR THERMISTOR LASER DC BIAS MONITOR ANODE MONITOR CATHODE TEC TEC GROUND GROUND NOT CONNECTED GROUND LASER MODULATION GROUND NOT CONNECTED 7654321 TEC 8 9 10 11 12 13 14 560 LSC2500 Typical Operating Characteristics PRODUCT TYPE MODULATION BIT RATE MODULATION DEPTH : LSC2500 : 2.488 Gb/s : 12% EXTINCTION RATIO mA V W A nm dB dB dB dB dB 16.00 2.26 1956.00 629.39 1545.04 45.99 -29.69 -33.27 -28.28 -32.34 75.40 5.83 THRESHOLD CURRENT (Ith) FORWARD VOLTAGE AT 3000 W POWER AT Ith + 40 mA MONITOR CURRENT AT 2000 W PEAK WAVELENGTH (12% XR) SIDEMODE SUPPRESSION SENSITIVITY (B-B) IE-10 SENSITIVITY (B-B) IE-4 SENSITIVITY (106 Km) IE-10 SENSITIVITY (106 Km) IE-4 Ssat Svar 100 90 80 REL. POWER (dB) 0 REL. POWER (dB) 70 60 50 40 30 20 10 0 1534 1536 1538 1540 1542 1544 1546 1548 1550 1552 1554 1556 -10 -20 -30 0 1000 2000 3000 4000 5000 6000 7000 FREQUENCY (MHz) WAVELENGTH (nm) 5.0 4.5 4.0 FIBER POWER (W) 4000 3500 FIBER POWER (W) 4000 3500 3000 2500 2000 1500 1000 500 0 200 400 600 800 1000 1200 1400 1600 MONITOR CURRENT (A) LASER VOLTS (V) 3000 2500 2000 1500 1000 500 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 10 20 30 40 50 60 70 80 90 100 DRIVE CURRENT (mA) 0 0 0 10 20 30 40 50 60 70 80 90 100 DRIVE CURRENT (mA) 561 Absolute Maximum Ratings at +25C Absolute limiting (maximum) ratings mean that no catastrophic damage will occur if the product is subjected to these ratings for short periods, provided that each limiting parameter is in isolation and all other parameters have values within the performance specification. It should not be assumed that limiting values of more than one parameter can be applied to the product at the same time. Parameter Laser Forward Current Laser Reverse Voltage Photodiode Forward Current Photodiode Reverse Voltage (Vr) Fiber Pull Strength Operating Temperature (Case) Storage Temperature Mechanical Shock Vibration TEC Current TEC Voltage Minimum Maximum 150 3.0 1 -10 10 -20 +65 -40 +85 MIL-STD-883, Method 2002, Test Condition B MIL-STD-883, Method 2007, Test Condition A 1.1 3.0 Units mA V mA V N C C A V Performance Specifications - Laser[1] Parameter Threshold Current (Ith) Slope Efficiency[3] Rise Time: 10% to 90% Fall Time: 90% to 10% Peak Wavelength Spectral Width (-30 dB) Modulated Temperature Dependence of Peak Wavelength Sidemodes (Modulated)[2] Dispersion Penalty (1800 ps/nm)[2] Tracking Error +65C Case, +25C Chip[4] -20C Case, +25C Chip Flatness of Frequency Response to 3 GHz Cut Off Frequency Minimum 10 0.02 1535 3.5 Typical 0.05 0.10 4.3 Maximum 30 0.12 0.12 0.12 1565 0.6 -34 1.5 0.5 0.5 1.5 Units mA mW/mA ns ns nm nm nm/C dB dB dB dB dB GHz Notes: 1. At +25C and Pf = 2 mW unless otherwise specified. 2. Measured at PRBS 223-1, 2.488 Gb/s, 12% extinction. 3. Other slope efficiencies available on request. 4. Fiber output power change for constant monitor output current. 562 Performance Specifications - Monitor Photodiode Parameter Photocurrent (Im) at 2 mW Dark Current (Vr = -5 V) at +25C Minimum 0.2 Maximum 2.0 100 Units mA nA Thermistor Test Conditions TC = +25C, Pf = 0 mW unless otherwise stated Test Limits Min. Max. 9.5 10.5 Typ. 4.4 Typ. 3900 Parameter Resistance Temperature Coefficient of Rt Constant Symbol Rt Rt/T 0C to +50C Units k %dR/K K TEC Test Conditions TC = +25C, Pf = 0 mW unless otherwise stated T = -40C, Tc = +65C T = -45C, Tc = -20C T = -20C, to +65C Test Limits Min. Max. 1.0 1.0 2.0 Parameter TEC Cooling Current TEC Heating Current Voltage Symbol Ic Ih Vc Units A A V Fiber Pigtail: Tight jacketed, self-mode stripping, single mode fiber Parameter Length Spot Size (Mode Radius) Cladding Diameter Core/Cladding Concentricity Secondary Jacket Diameter Effective Cutoff Wavelength Minimum 1.0 4.5 122 0.8 1150 Maximum 5.5 128 1.0 1.0 1240 Units m m m m mm nm Hewlett-Packard can offer a ruggedized fiber pigtail for this product range if extreme mechanical strength is required. The pigtail length can be customized to your specific length, with a connector, to a tolerance of 25 mm. 563 Ordering Information LSC2500 - XX Connector Type: FP = FC/PC Polish Model Name: LSC2500 Handling Precautions 1. The LSC2500 can be damaged by current surges or overvoltage. 2. Power supply transient precautions should be taken. 3. Normal handling precautions for electrostatic sensitive devices should be taken. CDRH Certification Hewlett-Packard Ltd. Whitehouse Road Ipswich, Suffolk IP1 5PB England Manufactured:_______ Serial No:__________ Model No: _______ This product conforms to the applicable requirements of 21 CFR 1040 at the date of manufacture. Laser Warning 564 |
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