L A S E R D I O D E
Laser diode
L8347/L7892 series
,
Pigtail type, 1.3 µm, 1.25 2.5 Gbps
L8347 and L7892 series are high-speed infrared emitter devices specifically developed for 1.3 µm band optical fiber communications. These
devices incorporate a high-speed Fabry-Perot laser diode integrated in a pig-tail module. Packages are available with various connectors and
mounting styles.
Features
Applications
High-speed Fabry-Perot laser diode
L8347 series: 1.25 Gbps
L7892 series: 2.5 Gbps
Optical fiber communications
Fiber channel
Gigabit ethernet
HDTV
Compatible with single-mode optical fiber
SDH
Absolute maximum ratings (Ta=25 °C)
ꢀ
Parameter
Symbol
L8347 series
Ith + 14 (DC)
Ith + 28 (pulse) *
L7892 series
Ith + 16 (DC)
Ith + 32 (pulse) *
Unit
mA
mA
V
Forward current
IF
Reverse voltage (laserdiode)
Reverse voltage (photodiode)
Operating temperature
Storage temperature
VR
2
20
VRm
Topr
Tstg
V
-20 to +70
-40 to +70
°C
°C
* Duty ratio: 50 %
Electrical and optical characteristics (Typ. Ta=25 °C, IF=Ith +10 mA)
ꢀ
Parameter
Symbol
L8347 series
L7892 series
Unit
µm
V
Peak wavelength
Forward voltage
Threshold
1.31
1.31
1.1
69
lp
VF
1.1
current
Ith
mA
mW
ps
Fiber end output
Rise time
Data rate
PF
tr
0.1
250
1.25
0.4
0.3
200
2.5
0.5
B
Im
Gbps
mA
Monitor current (photodiode)
Package lineup
ꢀ
L8347/L7892
-21 -22
Board
Configuration
-11
-12
-31
-32
Mounting style
Dimensional outline
Type
Coaxial
ꢀ
Panel
ꢀ
Module
Fiber
ꢀ
SM (9.5/125) f0.9
Length
Type
Dimensional outline
1 m +20 cm/-0 cm
FC
SC
ꢀ
FC
ꢀ
SC
ꢀ
SC
ꢀ
FC
ꢀ
Connector
ꢀ
1