1241/1243/1245-Type Uncooled Laser Transmitter
Data Sheet
September 1999
Characteristics
(continued)
Table 3. Optical Characteristics
Parameter
Average Power Output Options
1
Extinction Ratio
2
Optical Rise and Fall Times
3
:
OC-3/STM-1
OC-12/STM4
1062.5 Mbits/s
Center Wavelength
RMS Spectral Width
4
Side-mode Suppression Ratio
5
1.
2.
3.
4.
Symbol
P
O
r
E
t
R
, t
F
t
R
, t
F
t
R
, t
F
λ
∆λ
SMSR
Min
10
—
—
—
—
30
Typ
—
—
—
—
—
—
Max
—
1.0
0.5
0.37
4
—
Unit
dBm
dB
ns
ns
ns
nm
nm
dB
See Ordering Information.
See Ordering Information.
Output power definitions and measurement per ITU-T Recommendation G.957 and G.958.
Ratio of logic 1 to logic 0 power levels.
Between 10% and 90% (50% duty cycle).
Root-mean-square spectral width accounts for modes up to and including those 20 dB down from the central mode.
(Applies to 1241-Type only.)
5. Applies to 1243/1245-Type only.
Recommended User Interfaces
V
EE
360 •
50 • MICROSTRIP OR STRIPLINE-
CONTROLLED IMPEDANCE TRACES
16
ECL
DRIVER
50 •*
360 •
D
TRANSMITTER
15
50 •*
D
V
EE
0.1 µF
1-496(C).c
* Locate these components as close to DATA/DATA inputs as possible.
Note: The 1241 gigabit version does not require the external 50
Ω
terminations since this termination is included inside the module.
Figure 2. dc-Coupled, Differential Input
6
Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
