40 Gbits/s Lithium Niobate Electro-Optic Modulator
Preliminary Data Sheet, Rev.2
June 2001
The Lithium Niobate 40 Gbits/s Modulator (2625C) is a higher-
speed addition to the Agere Systems' family of modulators
that also includes 10 Gbits/s and 20 Gbits/s versions.
Features
s
Ti-diffusion process
s
Dual-drive technology
s
Thin-film, 50
termination in package for minimal
reflections
s
Low modulation voltages
s
Tested to
Telcordia Technologies
* 468
s
Angled interfaces for minimal optical reflections
s
Hermetic package
s
Separate dc bias electrode
Benefits
s
Excellent long-term bias stability over a full opera-
tional temperature range of 0 C to 70 C
s
Adjustable chirp for long distances at high bit rates
s
Internal polarizer
*
Telcordia Technologies
is a trademark of Telcordia Technologies,
Inc.
Applications
s
Digital high-speed telecommunications:
-- SONET OC-768
-- Undersea communications
s
Internet data communications
s
SONET test equipment
Description
Representing the latest advancements in high-speed
lithium niobate technology, the 40 Gbits/s electro-
optic modulator is designed for long-wavelength,
single-mode, external amplitude modulation applica-
tions. It uses an integrated Mach-Zehnder configura-
tion to convert single polarization CW light from a
semiconductor (DFB) laser into a time-varying optical
output signal. Using the source in the CW mode elim-
inates the need for demanding, high-speed perfor-
mance from the laser and reduces its cost.
The dual-drive design inherently offers the capability
to adjust the phase of the voltages on the electrodes,
which produces zero-chirp modulation operation.
The modulator is tested to, and meets the intent of,
TR-NWT-00468.
Preliminary Data Sheet, Rev. 2
40 Gbits/s Lithium Niobate Electro-Optic Modulator
June 2001
2
Agere Systems Inc.
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Characteristics
2625C Characteristic Curves
Parameter
Symbol
Min
Max
Unit
Storage Temperature
T
stg
40
85
C
Optical Input Power at 1.5
m
P
IN
--
30
mW
RF Voltage (peak to peak)
V
RF
--
10
V
dc Voltage (dc input)
V
dc
20
20
V
Operating Temperature
T
OP
0
70
C
Table 1. Optical/Electrical Characteristics (T
C
= 25 C)
Parameter
Min
Typ
Max
Unit
Operating Wavelength
1525
--
1620
nm
Optical Insertion Loss
--
--
6
dB
Extinction Ratio at dc
20
--
--
dB
Extinction Ratio at RF
13
--
--
dB
S11 Optical Return Loss
--
--
30
dB
Bandwidth
30
--
--
GHz
Drive Voltage (V
) at 1 GHz
--
--
3
V/side
Electrode Impedance
--
47
--
S11 Electrical Return Loss
--
--
10
dB
Figure 1. Magnitude of Electro-Optic Response
Figure 2. S11 Electrical Return Loss
0
40
30
20
10
51
48
45
42
39
36
FREQUENCY (GHz)
EO
E RES
P
O
N
S
E
(dBe)
0
40
30
20
10
35
30
25
20
15
0
FREQUENCY (GHz)
R
E
FLECTI
O
N
S11
(dB
)
35
25
15
5
5
10
1-1961 (F)
1-1962 (F)
Preliminary Data Sheet, Rev. 2
40 Gbits/s Lithium Niobate Electro-Optic Modulator
June 2001
For additional information, contact your Agere Systems Account Manager or the following:
INTERNET:
http://www.agere.com
E-MAIL:
docmaster@micro.lucent.com
N. AMERICA:
Agere Systems Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286
1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)
ASIA PACIFIC: Agere Systems Singapore Pte. Ltd., 77 Science Park Drive, #03-18 Cintech III, Singapore 118256
Tel. (65) 778 8833, FAX (65) 777 7495
CHINA:
Agere Systems (Shanghai) Co., Ltd., 33/F Jin Mao Tower, 88 Century Boulevard Pudong, Shanghai 200121 PRC
Tel. (86) 21 50471212, FAX (86) 21 50472266
JAPAN:
Agere Systems Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan
Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700
EUROPE:
Data Requests: DATALINE: Tel. (44) 7000 582 368, FAX (44) 1189 328 148
Technical Inquiries:OPTOELECTRONICS MARKETING: (44) 1344 865 900 (Ascot UK)
Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application.
Copyright 2001 Agere Systems Inc.
All Rights Reserved
June 2001
DS99-365LWP-2 (Replaces DS99-365LWP-1)
Package Information
Designed to NEBS (inside plant) standards, the hermetic package design incorporates a laser-sealed lid and sol-
dered fibers. The minimum bend radius for the fiber is 1.5 in.
Ordering Information
Table 3. Package Information
Description
Type
Input Optical Fiber
PANDA-type PMF
Output Optical Fiber
PANDA-type PMF
Fiber Connectors
FC
Fiber Length
1.5 m max
RF Connector
V-type
Package Dimensions
See Outline Diagram, page 3
Table 4. Device Information
Part Number
Comcode
2625C
109036483
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