LSC2500 HP | Alldatasheet

Document overview

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Technical content

Features

  • Center Wavelength Between 1535 nm and 1565 nm
  • Modulation Capability up to

2.488 Gb/s

  • 30 dB Internal Optical Isolation
  • 25 Ω Impedance Matched
  • Wide Operating Temperature Range: -20°C to +65°C
  • Industry Standard Hermetic

14 PIN Butterfly Package

Applications

  • Telecommunications
  • Fiber Optic Sensors
  • Cable Television
  • Military Communications and Control Systems
  • Instrumentation

Description

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 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)

MIN. 29.6 20.6 12.45 8.4 5.40 1500.00 4.5 8.8 25.9 2.50 A B C D E F G H I J K L M N P R S T U V DIM. U A I MAX. 30.4 21.1 12.95 9.0 5.90 6.5 9.0 26.1 2.70 0.75 12.0 2.54 0.50 0.20 7.0 30.0 2.0 0.75 17.8 NOM. ALL DIMENSIONS IN MILLIMETERS S B R H ∅ T C F J V M D K G E N P L LSC2500 Mechanical Outline Top View LSC2500 Pin Connections and Block Diagram Top View Side View Back View TEC 7654321 8 9 10 11 12 13 14 THERMISTOR THERMISTOR LASER DC BIAS MONITOR ANODE MONITOR CATHODE TEC TEC GROUND GROUND NOT CONNECTED GROUND LASER MODULATION GROUND NOT CONNECTED PIN CONNECTIONS

LSC2500 Typical Operating Characteristics 4.5 0 10 40 60 100 5.0 1.5 LASER VOLTS (V) DRIVE CURRENT (mA) 3020 50 4.0 3.5 3.0 2.5 2.0 1.0 0.5 70 80 90 -10 -30 1000 4000 6000 7000 -20 REL. POWER (dB) FREQUENCY (MHz) 30002000 5000 3500 0 10 40 60 100 4000 500 FIBER POWER (µW) DRIVE CURRENT (mA) 3020 50 3000 2500 2000 1500 1000 70 80 90 3500 0 200 600 1000 1600 4000 500 FIBER POWER (µW) MONITOR CURRENT (µA) 400 800 3000 2500 2000 1500 1000 1200 1400 1534 1536 1540 1542 1544 100 REL. POWER (dB) WAVELENGTH (nm) 1538 1546 1548 1550 1552 1556 1554 PRODUCT TYPE : LSC2500 MODULATION BIT RATE : 2.488 Gb/s MODULATION DEPTH : 12% EXTINCTION RATIO THRESHOLD CURRENT (Ith) mA 16.00 FORWARD VOLTAGE AT 3000 µW V 2.26 POWER AT Ith + 40 mA µW 1956.00 MONITOR CURRENT AT 2000 µW µA 629.39 PEAK WAVELENGTH (12% XR) nm 1545.04 SIDEMODE SUPPRESSION dB 45.99 SENSITIVITY (B-B) IE-10 dB -29.69 SENSITIVITY (B-B) IE-4 dB -33.27 SENSITIVITY (106 Km) IE-10 dB -28.28 SENSITIVITY (106 Km) IE-4 dB -32.34 Ssat 75.40 Svar 5.83

Parameter Minimum Maximum Units Laser Forward Current - 150 mA Laser Reverse Voltage - 3.0 V Photodiode Forward Current - 1 mA Photodiode Reverse Voltage (Vr) - –10 V Fiber Pull Strength - 10 N Operating Temperature (Case) –20 +65 °C Storage Temperature –40 +85 °C Mechanical Shock MIL-STD-883, Method 2002, Test Condition B Vibration MIL-STD-883, Method 2007, Test Condition A TEC Current - 1.1 A TEC Voltage - 3.0 V Absolute Maximum Ratings at +25°C 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. Performance Specifications – Laser[1] Parameter Minimum Typical Maximum Units Threshold Current (Ith) 10 - 30 mA Slope Efficiency[3] 0.02 0.05 0.12 mW/mA Rise Time: 10% to 90% - - 0.12 ns Fall Time: 90% to 10% - - 0.12 ns Peak Wavelength 1535 - 1565 nm Spectral Width (–30 dB) Modulated - - 0.6 nm Temperature Dependence of Peak Wavelength - 0.10 - nm/ °C Sidemodes (Modulated)[2] - - –34 dB Dispersion Penalty (1800 ps/nm) [2] - - 1.5 dB Tracking Error +65°C Case, +25°C Chip[4] - - 0.5 dB –20 °C Case, +25°C Chip - - 0.5 dB Flatness of Frequency Response to 3 GHz - - ± 1.5 dB Cut Off Frequency 3.5 4.3 - GHz Notes: 1. At +25°C and Pf = 2 mW unless otherwise specified. 2. Measured at PRBS 2 23-1, 2.488 Gb/s, 12% extinction. 3. Other slope efficiencies available on request. 4. Fiber output power change for constant monitor output current.

Fiber Pigtail: Tight jacketed, self-mode stripping, single mode fiber Parameter Minimum Maximum Units Length 1.0 - m Spot Size (Mode Radius) 4.5 5.5 µm Cladding Diameter 122 128 µm Core/Cladding Concentricity - 1.0 µm Secondary Jacket Diameter 0.8 1.0 mm Effective Cutoff Wavelength 1150 1240 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. Performance Specifications – Monitor Photodiode Parameter Minimum Maximum Units Photocurrent (Im) at 2 mW 0.2 2.0 mA Dark Current (Vr = –5 V) at +25°C - 100 nA Thermistor Test Conditions TC = +25°C, Pf = 0 mW Test Limits Parameter Symbol unless otherwise stated Min. Max. Units Resistance Rt 9.5 10.5 k Ω Temperature Coefficient of Rt Δ Rt/Δ T Typ. 4.4 %dR/K β Constant β 0°C to +50°C Typ. 3900 °K TEC Test Conditions TC = +25°C, Pf = 0 mW Test Limits Parameter Symbol unless otherwise stated Min. Max. Units TEC Cooling Current Ic Δ T = –40°C, Tc = +65°C - 1.0 A TEC Heating Current Ih Δ T = –45°C, Tc = –20°C - 1.0 A Voltage Vc Δ T = –20°C, to +65°C - 2.0 V

Ordering Information

Connector Type: FP = FC/PC Polish Model Name: LSC2500 CDRH Certification Hewlett-Packard Ltd. Whitehouse Road Ipswich, Suffolk IP1 5PB England This product conforms to the applicable requirements of 21 CFR 1040 at the date of manufacture. 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. Laser Warning