Fiber Optics
Medium Power
1300 nm FP Laser
in FC or SC Receptacle Package
STM51007x
Features
•
•
•
•
Designed for applications in fiber optic networks
Laser Diode with Multi-Quantum Well structure
Suitable for bit rates up to 1 Gbit/s
Ternary Photodiode at rear mirror for monitoring
and control of radiant power
• Hermetically sealed subcomponents,
similar to TO 46
• SM receptacle with 2-hole flange and
optional connector
STM51007G
STM51007N
Data Sheet
1
2001-06-01
STM51007x
Pin Configuration and Flange
Pin Configuration and Flange
Transmitter (bottom view)
2.54 mm
2
1
3
4
Pinning 1
LD
1
4
2
3
MD
Figure 1
Transmitter
Available Pinnings with Flange
Type
STM51007x
Transmitter
1
Data Sheet
2
2001-06-01
STM51007x
Description
Description
Differences between a Fabry-Perot and a DFB Laserdiode
A conventional laser consists of an amplifying medium and two end mirrors. The cavity
is longer than one wavelength, and a standing wave is created. The number n of half
L
-
wavelengths
λ
is n
=
2
×
--
. If L >>
λ
then we speak of a Fabry-Perot Laser because the
λ
laserdiode emits multi-longitudinal modes. Typically the laserdiode is 250 µm long. For
λ
= 1310 nm/1550 nm n is about 350. Therefore for many neighboring wavelengths the
“standing wavelength” condition specified above is fulfilled. For a DFB-Laser a special
grating acts as a distributed filter allowing only one of the cavity’s longitudinal modes to
˜
propagate. This can be described with a reduced oscillator length L which is in the range
of
λ.
For such a reduced oscillator length the standing wavelength condition will be
fulfilled for n
≈
2 what means for only one wavelength.
4
Intensity
0
0
1
1
2
3
Wavelength
λ
4
5
Figure 2
Fabry-Perot Laserdiode
Data Sheet
3
2001-06-01
STM51007x
Description
4
Intensity
0
0
1
2
3
Wavelength
λ
4
5
Figure 3
DFB Laserdiode
Regulatory Compliance
Feature
Electrostatic
Discharge (ESD) to the
Electrical Pins
Standard
MIL-STD 883D
Method 3015.7
Comments
Class 1 (<500 V)
Data Sheet
4
2001-06-01
STM51007x
Technical Data
Technical Data
Absolute Maximum Ratings
Parameter
Module
Operating temperature range at case
Storage temperature range
Soldering temperature (
t
max
= 10 s,
2 mm distance from bottom edge of case)
Laser Diode
Direct forward current
Radiant power CW
Reverse Voltage
Monitor Diode
Reverse Voltage
Forward Current
Symbol
Limit Values
min.
max.
85
85
260
°C
Unit
T
C
T
stg
T
S
–40
–40
I
F max
P
F, rad
V
R
V
R
I
F
120
2
2
10
2
mA
mW
V
V
mA
The electro-optical characteristics described in the following tables are only valid for use
within the specified maximum ratings or under the recommended operating conditions.
Transmitter Electro-Optical Characteristics
Parameter
Optical output power
(maximum)
Emission wavelength center of
range,
P
F
= 0.5
P
F, max.
Spectral width (RMS)
Temperature coefficient of
wavelength
Threshold current
(whole temperature range)
Radiant power at
I
th
Data Sheet
Symbol
min.
Limit Values
typ.
max.
1.2
1280
1330
5
0.5
2
45
1.5
40
5
Unit
mW
nm
P
F, max
λ
trans
σ
λ
TC
I
th
nm/K
mA
V
µW
2001-06-01
Forward voltage,
P
F
= 0.5
P
F, max.
V
F
P
th
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