LST2425X HP | Alldatasheet

Document overview

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Technical content

Features

  • Compact Coaxial Package
  • Strained Multi Quantum Well Distributed Feedback (DFB) Laser Chip
  • Low Thresholds Current and Operating Currents
  • Wide Operating Tempera- ture -40 °C to +85°C
  • Excellent Wavelength Stability with Temperature ~0.1 nm/
  • Narrow Line Width <1 nm @ -20 dB
  • Side Mode Suppression Ratio >-30 dB
  • Modulation Capability up to

622 Mb/s

  • Convenient Variety of Pinout and Mounting Flange Options

Applications

  • Telecommunications
  • Fiber in the Loop
  • Inter/Intra Office
  • SONET/SDH
  • Datacommunications
  • Switches

Description

Products in the LST242X family are compact coaxial pigtailed DFB laser transmitters, operating in the 1300 nm wavelength region and coupling light to single mode fiber. They are designed for use in short, medium and long distance networks with bit rates up to 622 Mb/s. The device features a high reliability SMQW-DFB laser diode and rear facet monitor photo- diode. These are electrically connected to four pins in an industry-standard configuration. Environmental performance is designed to be compatible with the requirements of Bellcore’s TA-NWT-000983 document. Options within the LST242X family offer pinouts and pin rotational orientations designed to match existing products available on the market. We also offer a comprehensive range of alternative mounting flanges including a dual in line option. If the specific arrangement or performance you require is not listed, please contact your local representative as our highly flexible design and manufacturing processes allow both physical and electro-optical customization to meet your needs. Preliminary Product Disclaimer This preliminary data sheet is provided to assist you in the evaluation of engineering samples of the product which is under development and targeted for release during 1997. Until Hewlett-Packard releases this product for general sales, HP reserves the right to alter prices, specifications, features, capabilities, function, manufacturing release dates, and even general availability of the product at any time. 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. (5/97)

Parameter Symbol Test Condition Min. Max. Units Laser Forward Current If DC 120 mA Laser Reverse Voltage Vlr DC 2 V Photodiode Reverse Voltage Vr DC 20 V Photodiode Forward Current Ipf DC 1 mA Operating Temperature A Tc Temperature measured at case –40 +85 °C B 0 +70 °C Storage Temperature Ts –40 +85 °C Relative Humidity RH noncondensing %RH Fiber Pull Strength Three times; 10 sec. 10 N Mechanical Shock MIL-STD-883D, Method 2002, 500 G Condition A Vibration MIL-STD-883D, Method 2007, 20 G Condition A Absolute Maximum Ratings 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 LST242X LST3421 Parameter Symbol Test Condition Min. Max. Units LASER CW, over operating temperature range, Po, as noted below unless otherwise stated and –20 dB ORL Rated Optical Power Po Tc = ranges specified above, CW 2 mW Threshold Current Ith Tc = +25 °C4 1 5 m A Threshold Current Ith Over operating temperature range 2 40 mA Coupled Power in “Off” State Pth If = Ith – 2 mA 0 10 µW Drive Current above Ith, Id Tc = +25 °C 12.5 25 mA Over operating temperature range - 40 mA Forward Voltage Vf 1.6 V Center Wavelength λ Over operating temperature range 1280 1335 nm Wavelength/Temperature Δλ /Δ T 0.1 nm/ °C Coefficient Spectral Width σ At –20 dB 1 nm Side Mode Suppression Ratio SMSR +30 dB Rise and Fall Time τ 10-90%, Ith to Po 0.5 ns MONITOR PHOTODIODE Tc = +25°C, Vr = 5 V, Po = Rated Power Photocurrent Im 50 1000 µA Dark Current Id Po = 0 µW2 0 n A Capacitance C 1 MHz 10 pF Tracking Error Δ R Im = Im (Po, +25 °C) –1 1 dB Tc + –40°C to + 85°C for Im = Im (Po, +25°C)

Parameter Minimum Maximum Units Fiber Pigtail Length 1000 mm Spot Size (Mode Radius) 4.5 5.5 µm Cladding Diameter 122 128 µm Core/Cladding Concentricity 1 µm Secondary Jacket Diameter 0.8 1 mm Effective Cutoff Wavelength 1150 1240 nm Reliability Target Parameter Condition Min. Max. Units Median Life 50% inc. in total drive current, Tc = +25 °C 2x10 5 hours

H N I L MF K G P – PIN DIAMETER R J Q B CO A D OTHER FLANGE OPTIONS ARE AVAILABLE. MIN. TYP. MAX. 11.8 2.4 12.5 7.4 17.0 3.7 12.2 2.6 12.9 A B C D E F MIN. TYP. MAX. 12.0 2.1 5.3 2.0 1000 20.0 2.3 G H I J K L 0.4 0.9 5.3 2.0 0.5 1.25 0.5 M N O P Q R DIM. E Example of LST242X – All dimensions in mm. FUNCTION MONITOR ANODE (-VE) MONITOR CATHODE (+VE) LASER CATHODE (-VE) LASER ANODE (+VE) PIN CASE LASER LST2425

D H TYP. 12.60 7.62 2.54 30.00 A B C D DIM. C/L E PIN 1 INDICATOR F I G PHOTODIODE LASER CASE FUNCTION NO CONNECTION MONITOR ANODE (-VE) MONITOR CATHODE (+VE) NO CONNECTION NO CONNECTION LASER CATHODE (-VE) LASER ANODE (+VE) PIN (CONNECTED TO HEADER) NO CONNECTION8 TYP. 10.20 12.60 4.26 3.53 E F G H DIM. NOTE: PINS 1, 4, 5 AND 8 ARE ISOLATED FROM THE INTERNAL CIRCUITRY, BUT ARE ELECTRICALLY CONNECTED TO EACH OTHER. PINS 1, 4, 5, & 8 – 0.51 x 0.38 NOM. K J TYP. 2.54 8.60 3.20 I J K DIM. OPTION 1 LST3421 Specification – All dimensions in mm.

Ordering Information

Connector Type: AP = Angle polished FC/PC Other connections available. Contact HP for details. Flange: B = Without mounting flange T = Universal flange Temperature Range: A = –40°C to +85°C B = 0°C to +70°C Dual-in-Line Package LST3421X - ZZ Connector Type: AP = Angle polished FC/PC Other connections available. Contact HP for details. Temperature Range: A = –40°C to +85°C B = 0°C to +70°C