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Analog Coaxial Pigtailed Laser Module Technical Data
LSA2825 - Analog Coaxial Laser LSA3821 - 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 * Convenient Variety of Pinout and Mounting Flange Options
Description
The LSAX82X is a compact analog coaxial pigtailed laser transmitter, operating in the 1300 nm wavelength region and coupling light to single mode fiber. 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.
Applications
* CATV/CCTV * Return Path Links * LANS/WANS
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.
526
5965-7337E (5/97)
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
LSA2825 LSA3821 Min. Max.
Parameter LASER
Symbol
Rated Optical Power Threshold Current Threshold Current Slope Efficiency Drive Current above Ith, for Im = Im (Po, +25C) Forward Voltage Center Wavelength Wavelength/Temperature Coefficient Spectral Width MONITOR PHOTODIODE Photocurrent Dark Current Capacitance Tracking Error
Po Ith Ith Id Vf /T Im Id C DP
Test Condition CW, Tc = -40C to +85C, Po as noted below unless otherwise stated CW Tc = +25C Tc = +25C Tc = +25C Tc = -40C to +85C Tc = +25C Tc = -40C to +85C
Units
1.0 3.5 1 30 12.5 10 1286 1260
10 30 80 33.3 55 1.6 1336 1360 0.4 2.5
mW mA mA W/mA mA mA V nm nm nm/C nm A nA pF dB
One sigma, RMS Tc = +25C, Vr = 5 V 200 Po = 0 W 1 MHz Im = Im (Po, +25C) Tc + -40C to + 85C
-1
1000 20 10 +1
527
Other Documentation
1. SMQW Laser Reliability Report - Publication Number 5965-1293E 2. LST282X/292X Characterization Report - Publication Number 5965-5374E
Analog Specifications
Parameter Relative Intensity Noise (RIN) 2nd Order Distortion Symbol RIN Test Conditions Po = 1 mW, Tc = -40C to +85C Tc = +25C, Po = 1 mW, OMD = 35% Two tone test: F1 = 13 MHz, F2 = 19 MHz, 20 km fiber, Total loss = 9 dB, F1 F2 Tc = +25C, Po = 1 mW, OMD = 35% Two tone test: F1 = 13 MHz, F2 = 19 MHz, 20 km fiber, Total loss = 9 dB, 2F1 F2, 2F2 F1 Min. Max. -135 -43 Unit dB/Hz dBc
3rd Order Distortion
-
-50
dBc
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
528
Example of LSA2825-T - 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 I J K L
MIN. 12.0
TYP.
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
5.3 2.0 2.1 1000
0.4 0.5 1.25
0.5
OTHER FLANGE OPTIONS ARE AVAILABLE.
PINOUT
LST2825 CASE 4
LASER
1
PHOTODIODE
PIN 1 2 3 4
FUNCTION MONITOR ANODE (-VE) MONITOR CATHODE (+VE) LASER CATHODE (-VE) LASER ANODE (+VE)
3
2
529
LSA3821 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 3 2 1
PIN 5 LASER 6 7 8 OPTION 1 1 2 3 4 5 6 7 8
FUNCTION NO CONNECTION MONITOR ANODE (-VE) MONITOR CATHODE (+VE) NO CONNECTION NO CONNECTION LASER CATHODE (-VE) LASER ANODE (+VE) (CONNECTED TO HEADER) NO CONNECTION
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.
ALL DIMENSIONS IN MILLIMETERS
530
Ordering Information
Coaxial Package LSA2825 Y - ZZ Connector Type: AP = Angle polished FC/PC AS = Angle polished SC/PC US = Ultra polished SC/PC SF = Superpolished FC/PC Flange: B = Without mounting flange T = Universal flange LSA3821 ZZ Connector Type: AP = Angle polished FC/PC AS = Angle polished SC/PC US = Ultra polished SC/PC SF = Superpolished FC/PC
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.
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