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| Coaxial Pigtailed Laser Module Technical Data LST252X - 200 W Coaxial Laser LST282X - 1 mW Coaxial Laser LST292X - 1.6 mW Coaxial Laser LST3X21 - Dual-in-Line Package Features * Compact Coaxial Package * Strained Multi Quantum Well (SMQW) Laser Chip * Low Thresholds Current and Operating Currents * Wide Operating Temperature -40C to +85C * Optical Power May Be Customized up to 2 mW * Modulation Capability up to 622 Mb/s * Convenient Variety of Pinout and Mounting Flange Options Description Products in the LST2X2X family are compact coaxial pigtailed 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 laser diode and rear facet monitor photodiode. These are electrically connected to four pins in an industrystandard configuration. Environmental performance is designed to be compatible with the requirements of Bellcore's TA-NWT-000983 document. Options within the LST2X2X family offer pinouts and pin rotational orientations designed to match existing products Applications * * * * * * Telecommunications Fiber in the Loop Inter/Intra Office SONET/SDH Datacommunications Switches 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. 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. 520 5965-7336E (4/97) 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. Parameter Laser Forward Current Laser Reverse Voltage Photodiode Reverse Voltage Photodiode Forward Current Operating Temperature Storage Temperature Relative Humidity Fiber Pull Strength Mechanical Shock Vibration Symbol If Vlr Vr Ipf Tc Ts RH Test Condition DC DC DC DC Temperature measured at case Three times; 10 sec. MIL-STD-883D, Method 2002, Condition A MIL-STD-883D, Method 2007, Condition A Limits Min. Max. 120 2 20 1 -40 +85 -40 +85 noncondensing 10 500 20 Units mA V V mA C C %RH N G G Performance Specifications LST252X LST282X LST292X LST3521 LST3821 LST3921 Min. Max. Min. Max. Min. Max. Units Parameter LASER Symbol Rated Optical Power Threshold Current Threshold Current Coupled Power in "Off" State Slope Efficiency Drive Current above Ith, for Im = Im (Po, +25C) Forward Voltage Center Wavelength Wavelength/ Temperature Coefficient Spectral Width Rise and Fall Time Po Ith Ith Pth Id Test Condition CW, Tc = -40C to +85C, Po as noted below unless otherwise stated Tc = ranges specified above, CW Tc = +25C If = Ith - 2 mA Tc = +25C Tc = +25C Tc = -40C to +85C 0.2 3.5 1.5 10 30 10 16 20 33.3 1.0 3.5 1.5 10 30 10 80 20 33.3 1.6 3.5 1 10 30 10 mW mA mA W 10 12.5 10 50 12.5 10 80 12.5 10 128 W/mA 20 33.3 mW mA Vf /T Tc = +25C Tc = -40C to +85C 1.6 1.6 1.6 V 1286 1336 1286 1336 1286 1336 nm 1260 1360 1260 1360 1260 1360 nm 0.4 0.4 0.4 nm/C One sigma, RMS 10-90%, Ith to Po 2.5 0.5 2.5 0.5 2.5 0.5 nm ns 521 Performance Specifications (continued) LST252X LST282X LST292X LST3521 LST3821 LST3921 Min. Max. Min. Max. Min. Max. Units Parameter MONITOR PHOTODIODE Photocurrent Dark Current Capacitance Tracking Error Rise and Fall Time Symbol Test Condition Tc = +25C, Vr = 5 V, Po = Rated Power Po = 0 W 1 MHz Im = Im (Po, +25C) Tc + -40C to + 85C 10-90%, Ith to Po Im Id C DR tr 200 1000 20 10 -1 +1 2 200 -1 1000 20 10 +1 2 200 -1 1000 20 10 +1 - A nA pF dB ns Fiber Pigtail Parameter Fiber Pigtail Length Spot Size (Mode Radius) Cladding Diameter Core/Cladding Concentricity Secondary Jacket Diameter Effective Cutoff Wavelength Minimum 1000 4.5 122 0.8 1150 Maximum 5.5 128 1 1 1240 Units mm m m m mm nm Reliability Target Parameter Median Life Condition 50% inc. in total drive current, Tc = +25C Min. 2x105 Max. Units hours Other Documentation SMQW Laser Diode Reliability Datasheet LST282X/LST292X/LST3821/LST3921 Interim Qualification Report Publication number 5965-1293E Publication number 5965-5374E 522 Example of LST2X2X - All dimensions in mm. A I K H G B C O F M N L Q D P - PIN DIAMETER J R E DIM. A B C D E F MIN. TYP. 7.4 17.0 MAX. DIM. G H MIN. 12.0 TYP. MAX. 20.0 DIM. M N O P Q R MIN. TYP. 0.9 5.3 2.0 MAX. 11.8 3.7 2.4 12.5 12.2 2.6 12.9 I J K L 5.3 2.0 2.1 1000 2.3 0.4 0.5 1.25 0.5 LST3X21 Specification - All dimensions in mm. PINOUT OPTIONS LST2X25 PIN 1 2 3 4 FUNCTION MONITOR ANODE (-VE) MONITOR CATHODE (+VE) LASER CATHODE (-VE) LASER ANODE (+VE) PH CASE 4 1 2 O D TO PHOTODIODE IO D LASER 1 E 3 LST2X27 PIN 4 CASE 1 2 3 4 FUNCTION LASER CATHODE (-VE) MONITOR CATHODE (+VE) MONITOR ANODE (-VE) LASER ANODE (+VE) LA SE R 3 2 LST2X25 LST2X27 523 LST3X21 Specification - All dimensions in mm. D M 4 3 A B C 2 1 5 6 C/L 7 8 J K PIN 1 INDICATOR F E G H I CASE 4 PHOTODIODE PIN 5 LASER FUNCTION NO CONNECTION MONITOR ANODE (-VE) MONITOR CATHODE (+VE) NO CONNECTION NO CONNECTION LASER CATHODE (-VE) LASER ANODE (+VE) (CONNECTED TO HEADER) NO CONNECTION 3 2 1 6 7 8 1 2 3 4 5 6 7 8 OPTION 1 DIM. A B C D TYP. 12.60 7.62 2.54 30.00 DIM. E F G H TYP. 10.20 12.60 4.26 3.53 DIM. I J K M TYP. 2.54 8.60 3.20 1000 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. PINS 2, 3, 6, & 7 - 0.4/0.5 DIA. 524 Ordering Information Coaxial Package LST2X2X XX Y ZZ Connector Type: FP = FC/PC ST* = ST SC = SC DN = DIN SF = Superpolish FC/PC Flange: B = Without mounting flange T = Universal flange Empty = 155 Mb/s operation S4 = 622 Mb/s operation Pinout: 5 = see pinout diagram 7 = see pinout diagram Power: 5 = Po = 200 W 8 = Po = 1 mW 9 = Po = 1.6 mW Dual-in-Line Package LST3X21 - XX - ZZ Connector Type: FP = FC/PC ST* = ST SC = SC DN = DIN SF = Superpolish FC/PC Empty = 155 Mb/s operation S4 = 622 Mb/s operation Power: 5 = Po = 200 W 8 = Po = 1 mW 9 = Po = 1.6 mW *ST(R) is a registered trademark of AT&T. 525 |
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