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Coaxial Pigtailed Laser Module Technical Data
LST262X
Features
* Compact Coaxial Package * Wide Operating Temperature -40C to +85C * Modulation Capability Up to 622 Mbit/s * 200 W Fiber Coupled Power * Convenient Variety of Pin Out and Mounting Flange Options
Description
The LST262X is a compact coaxial pigtailed laser transmitter, operating in the 1300 nm wavelength region and coupling light to single mode fiber. It is designed for use in short and medium distance networks with bit rates up to 622 Mbit/s. The device features a high reliability laser diode and rear facet monitor photodiode. 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-TSY-000983 document. Options within the LST262X family offer pinouts and pin rotational orientations designed to match existing products available
Applications
* Telecommunications * Fiber in the Loop * Inter/lntra Office * SONET/SDH * Datacommunications * Switches
on the market. We also offer a comprehensive range of alternative mounting flanges. 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 customisation to meet your needs.
Laser Safety Warning This device is a Class Illb (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.
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Absolute Maximum Ratings
Absolute maximum limits mean that no catastrophic damage will occur if the product is subjected to these ratings for short periods, provided 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 Current Laser Reverse Voltage Photodiode Reverse Voltage Photodiode Forward Current Operating Temperature Storage Temperature Relative Humidity Fiber Pull Strength Mechanical Shock Vibration
Symbol Conditions If Ir Vlr Vr Ipf Tc Ts RH DC DC DC DC DC Pf = 200 W
Limits Min Max - - - - - -40 -40 0.0 - 150 100 2 10 1 +85 +85 noncondensing 10
Units mA A V V mA C C %RH N
Mil Std 883D, Method 2002, Condition B Mil Std 883D, Method 2007, Condition A
Performance Specifications
Parameter LASER Threshold Current Peak Optical Output Power Optical Output Power Drive Current above Ith Slope Efficiency Forward Voltage Centre Wavelength Temp. Dependence of c Linewidth Rise Time Fall Time Small Signal Freq. Response Ith Pf Pth Id Vf c c/T r f Bw Symbol Conditions CW, Tc = 25C, Pf = 200 W unless otherwise stated 5 200 - 10 8 - 1280 - - - - 1.0 25 - 10 25 20 1.8 1330 0.4 2.5 0.5 0.5 - mA W W mA W/mA V nm nm/C nm ns ns GHz Limits Min Max Units
Pth = Pf @ Ith - 2 mA Pf = 200 W
Note 1 Tc = -40C to +85C 1x, RMS, Note 1 10% to 90%: Ith to Pf = 200 W 90% to 10%: Pf = 200 W to Ith
Note: 1. Modulated measurements also available.
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Performance Specifications (cont'd.)
Parameter MONITOR PHOTODIODE Symbol Test Conditions Tc = 25C, Vr = 5 V (Note 2), Pf = 200 W unless otherwise stated lm R Id C R r f 200 1.0 - - - - - 1000 5.0 20 10 1.0 2.0 2.0 A A/W nA pF dB ns ns Limits Min Max Units
Photocurrent Responsivity Dark Current Capacitance Tracking Error Rise Time Fall Time
Note:
Pf = 0 W 1 MHz Im = Im @ (Pf = 200 W, Tc = 25C) Tc = -40 to +85C 10% to 90%: Ith to Pf = 200 W 90% to 10%: Pf = 200 W to Ith
2. Photodiode will also operate under zero bias conditions.
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 Min 1.0 4.5 122 - 0.8 1150 Max - 5.5 128 1.0 1.0 1240 Unit m m m m mm nm
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Examples of LST262X-X Flange Options - All dimensions in mm.
LST262X-D
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F 41 B O 32 C G N M
D E 4 1 J DIMENSION A B C D E F G
I K MIN. 7.2 16.8 7.2 0.9 3.6 12.5 0.41 MAX. 7.6 17.2 7.6 1.1 3.8 12.9 0.49 DIMENSION H I J K L M N MIN. 2.1 3.9 12.0 - 1000 - 0.8 L MAX. 2.3 4.1 - 25.0 - 6.0 1.0
CASE
PHOTODIODE
LASER 3 2
O: PITCH CIRCLE DIAMETER OPTIONS: LST2625-D = 2 mm LST2626-D = 2.54 mm
LST-262X Pkg Dimen 1
LST262X-E
A
M 2 B N 1 4 3 C E J K
D F
G L H I
2 PHOTODIODE
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3 LASER 4 CASE
DIMENSION A B C D E F G
MIN. 2.4 15.7 11.8 7.8 0.41 12.0 1.3
MAX. 2.6 16.3 12.2 8.2 0.49 - 1.7
DIMENSION H I J K L M
MIN. - 1000 0.8 - - -
MAX. 25.0 - 1.0 6.0 4.2 6.3
N: PITCH CIRCLE DIAMETER OPTIONS: LST2627-E = 2 mm LST2628-E = 2.54 mm
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Ordering Information
The following details how to define the part number correctly for the LST262X family of coaxial pigtailed lasers. Electro-optic parameter limits are as defined on previous pages for all options.
LST262X-X-XX
Connector Type: FP = FC/PC ST = ST(R) SC = SC DN = DIN BI = Biconic D4 = D4 SF = Superpolish FC/PC Flange Type: B - Without mounting flange D - 2 hole PCB mount, 12.7 mm between centers E - 2 hole panel mount, 12 mm between centers Pin Outs - See Drawings: 5 = 2 mm PCD 6 = 2.54 mm PCD 7 = 2 mm PCD 8 = 2.54 mm PCD
Allowed Model Names: LST2625-D LST-2626-D LST2627-E LST2628-E LST262*-B (No flange)
CDRH Certification
Laser Warning
10 b Laser Product
ST(R) is a Registered Trademark of AT&T.
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For more Information: United States: (800) 545-4306 Far East/Australasia: (65) 290-6305 Japan: (81) 3 3331 6111 Europe (44)473-742250 Canada: (416)206-4725
Or contact your local HP sales office listed in your telephone directory and ask for a Components representative.
Data subject to change Copyright (c) 1995 Hewlett-Packard Co. Printed in U.S.A. 5962-9395E (1/95)

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