Data Sheet

May 2001

10 Gbits/s Lithium Niobate Electro-Optic Modulator

3

Agere Systems Inc.

Optical/Electrical Characteristics

* 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.

Note: Circuitry in dotted lines is used only with the 2623CSA.

Figure 1. Recommended Operating Circuit Diagram

Figure 2. Equivalent Circuit Diagram

Table 1. Optical/Electrical Characteristics

Parameter

Min

Typ

Max

Unit

Operating Wavelength:

C-band

L-band

1525

1565

—

—

1565

1620

nm

nm

Insertion Loss:

2623N, 2623Y, 2623CS

2623CSA

3

3.5

3.7

4.5

5.5

6.5

dB

dB

Extinction Ratio @ dc

20

27

—

dB

Extinction Ratio @ RF

—

13

—

dB

S11 Optical Return Loss

—

—

–35

dB

Bandwidth*

8

10

—

GHz

Drive Voltage (V

π) @ dc

2.8

3.1

4.0

V

Drive Voltage (V

π) @ 1 GHz

3.5

4.1

5.0

V

Attenuation Voltage @ –19 dB

15

19

22

V

Electrode Impedance

—

43

—

Ω

S11 Electrical Return Loss (0.13 GHz—5 GHz)

—

–15

–13

dB

S11 Electrical Return Loss (5 GHz—10 GHz)

–

–14

–12

dB

S11 Electrical Return Loss (10 GHz—18 GHz)

—

–8

–6

dB

MODULATOR

DRIVER

BIAS

TEE

dc BIAS

CONTROLLER

PHOTODETECTOR/

PREAMP

dc

ATTENUATION

CONTROLLER

HIGH-

SPEED

DATA

INPUT

PMF

CW-LASER

2623N, 2623Y, 2623CS, 2623CSA

SPLITTER

SEE NOTE.

2623N, 2623Y, 2623CS

43

Ω

0.2

µF

43

Ω

0.2

µF

–10 pF

2623CSA

1-1063 (F)

1-1062 (F)