AGILENT LSA3821

Analog Coaxial Pigtailed
Laser Module
Technical Data
LSA2825 - Analog
Coaxial Laser
LSA3821 - Dual-in-Line
Package
Features
Description
• Compact Coaxial Package
• Strained Multi Quantum
Well (SMQW) Laser Chip
• Low Thresholds Current and
Operating Currents
• Wide Operating Temperature –40°C to +85°C
• Optical Power May Be
Customized up to 2 mW
• Convenient Variety of
Pinout and Mounting Flange
Options
The LSAX82X is a compact
analog coaxial pigtailed laser
transmitter, operating in the
1300 nm wavelength region and
coupling light to single mode
fiber.
Applications
Environmental performance is
designed to be compatible with
the requirements of Bellcore’s
TA-NWT-000983 document.
• CATV/CCTV
• Return Path Links
• LANS/WANS
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.
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
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
Vibration
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
Parameter
Symbol
LASER
Rated Optical Power
Threshold Current
Threshold Current
Slope Efficiency
Drive Current above Ith,
for Im = Im (Po, +25°C)
Po
Ith
Ith
η
Id
Forward Voltage
Center Wavelength
Vf
λ
Wavelength/Temperature
Coefficient
Spectral Width
MONITOR PHOTODIODE
Photocurrent
Dark Current
Capacitance
Tracking Error
Test Condition
CW, Tc = –40°C to +85°C, Po as
noted below unless otherwise
stated
CW
Tc = +25°C
LSA2825
LSA3821
Min.
Max.
Tc = +25°C
Tc = +25°C
Tc = –40°C to +85°C
1.0
3.5
1
30
12.5
10
Tc = +25°C
Tc = –40°C to +85°C
1286
1260
∆λ/∆T
σ
Im
Id
C
DP
One sigma, RMS
Tc = +25°C, Vr = 5 V
200
Po = 0 µW
1 MHz
Im = Im (Po, +25°C)
Tc + –40°C to + 85°C
–1
Units
10
30
80
33.3
55
1.6
1336
1360
0.4
mW
mA
mA
µW/mA
mA
mA
V
nm
nm
nm/°C
2.5
nm
1000
20
10
+1
µA
nA
pF
dB
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
3rd Order Distortion
-
-
Test Conditions
Po = 1 mW, Tc = –40°C to +85°C
Min.
Tc = +25°C, Po = 1 mW, OMD = 35%
Two tone test: F1 = 13 MHz, F2 = 19 MHz,
20 km fiber, Total loss = 9 dB, F1 ± F2
Tc = +25°C, 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
Max.
–135
Unit
dB/Hz
–43
dBc
–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
Units
mm
µm
µm
µm
mm
nm
5.5
128
1
1
1240
Reliability Target
Parameter
Median Life
528
Condition
50% inc. in total drive current, Tc = +25°C
Min.
2x105
Max.
Units
hours
Example of LSA2825-T – All dimensions in mm.
H
A
I
K
G
C
O
F
M
N
L
Q
E
P – PIN DIAMETER
D
J
R
DIM.
MIN.
TYP.
A
MAX.
DIM.
MIN.
G
12.0
7.4
B
C
D
11.8
E
F
2.4
12.5
12.2
H
I
2.6
12.9
J
K
L
17.0
3.7
TYP.
5.3
2.0
2.1
1000
DIM.
MIN.
TYP.
M
0.9
N
O
5.3
2.0
P
Q
R
0.4
MAX.
0.5
0.5
1.25
OTHER FLANGE OPTIONS ARE AVAILABLE.
PINOUT
LST2825
1
PHOTODIODE
CASE 4
LASER
B
3
PIN
FUNCTION
1
2
3
4
MONITOR ANODE (-VE)
MONITOR CATHODE (+VE)
LASER CATHODE (-VE)
LASER ANODE (+VE)
2
529
LSA3821 Specification – All dimensions in mm.
D
A
B
4
5
3
6
2
7
1
8
M
C
C/L
J
K
PIN 1 INDICATOR
F
E
G
I
PIN
CASE
4
5
3
6
2
7
1
8
LASER
PHOTODIODE
H
OPTION 1
DIM.
TYP.
DIM.
TYP.
DIM.
TYP.
A
B
C
D
12.60
7.62
2.54
30.00
E
F
G
H
10.20
12.60
4.26
3.53
I
J
K
M
2.54
8.60
3.20
1000
ALL DIMENSIONS IN MILLIMETERS
530
FUNCTION
1
2
NO CONNECTION
MONITOR ANODE (-VE)
3
4
5
6
7
MONITOR CATHODE (+VE)
NO CONNECTION
NO CONNECTION
LASER CATHODE (-VE)
LASER ANODE (+VE)
(CONNECTED TO HEADER)
8
NO CONNECTION
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.
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.
531