Data Sheet
September 1999
1241/1243/1245-Type Uncooled Laser Transmitter
Characteristics (continued)
Table 3. Optical Characteristics
Parameter
Average Power Output Options1
Extinction Ratio2
Symbol
PO
Min
Typ
Max
Unit
See Ordering Information.
dBm
dB
rE
10
—
—
Optical Rise and Fall Times3:
OC-3/STM-1
OC-12/STM4
tR, tF
tR, tF
tR, tF
—
—
—
—
—
—
1.0
0.5
0.37
ns
ns
ns
1062.5 Mbits/s
Center Wavelength
RMS Spectral Width4
Side-mode Suppression Ratio5
λ
See Ordering Information.
nm
nm
dB
∆λ
—
—
—
4
SMSR
30
—
1. Output power definitions and measurement per ITU-T Recommendation G.957 and G.958.
2. Ratio of logic 1 to logic 0 power levels.
3. Between 10% and 90% (50% duty cycle).
4. 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
50 • MICROSTRIP OR STRIPLINE-
CONTROLLED IMPEDANCE TRACES
360 •
360 •
16
15
D
D
ECL
DRIVER
TRANSMITTER
50 •*
50 •*
0.1 µF
V
EE
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 ]
