Data Sheet
May 2001
10 Gbits/s Lithium Niobate Electro-Optic Modulator
Optical/Electrical Characteristics
Table 1. Optical/Electrical Characteristics
Parameter
Operating Wavelength:
C-band
L-band
Insertion Loss:
2623N, 2623Y, 2623CS
2623CSA
Extinction Ratio @ dc
Extinction Ratio @ RF
S11 Optical Return Loss
Bandwidth*
Drive Voltage (Vπ) @ dc
Drive Voltage (Vπ) @ 1 GHz
Attenuation Voltage @ –19 dB
Electrode Impedance
S11 Electrical Return Loss (0.13 GHz—5 GHz)
S11 Electrical Return Loss (5 GHz—10 GHz)
S11 Electrical Return Loss (10 GHz—18 GHz)
Min
1525
1565
3
3.5
20
—
—
8
2.8
3.5
15
—
—
–
—
Typ
—
—
3.7
4.5
27
13
—
10
3.1
4.1
19
43
–15
–14
–8
Max
1565
1620
5.5
6.5
—
—
–35
—
4.0
5.0
22
—
–13
–12
–6
Unit
nm
nm
dB
dB
dB
dB
dB
GHz
V
V
V
Ω
dB
dB
dB
* Bandwidth stated is electrical-optical-electrical as determined by the ratio of the received RF electrical power (at a photodiode) relative to the
RF electrical power used to drive the modulator. This response is referenced to the value at 130 MHz.
dc BIAS
CONTROLLER
SEE NOTE.
PHOTODETECTOR/
PREAMP
HIGH-
SPEED
DATA
INPUT
MODULATOR
DRIVER
BIAS
TEE
dc
ATTENUATION
CONTROLLER
PMF
CW-LASER
2623N, 2623Y, 2623CS, 2623CSA
SPLITTER
Note: Circuitry in dotted lines is used only with the 2623CSA.
1-1062 (F)
Figure 1. Recommended Operating Circuit Diagram
43
Ω
0.2
µF
2623N, 2623Y, 2623CS
43
Ω
0.2
µF
–10 pF
2623CSA
Figure 2. Equivalent Circuit Diagram
Agere Systems Inc.
1-1063 (F)
3
AGERE [ AGERE SYSTEMS ]
