Datasheet 2623Y, 2623N, 2623CSA, 2623CS Datasheet (AGERE)

Page 1

10 Gbits/s Lithium Niobate Electro-Optic Modulator

Data Sheet

May 2001

The Lithium Niobate Modulators include three single-drive modulators (2623N, 2623Y, 2623CS) and a single-drive modulator with an integrated attenuator (2623CSA). All devices are capable of modulation rates up to 10 Gbits/s.

Features

■

Ti-diffusion process

■

Single-drive technology

■

C- and L-band models

■

Slim, hermetic package

■

Bandwidths up to 10 GHz

■

Operational over a temperature range of 0 °C to 70 °C

■

43 Ω design for minimal electrical reflections

■

Angled interfaces for minimal optical reflections

■

Integrated optical attenuator available on 10 Gbits/s modulator (2623CSA)

■

Tested to

Telcordia Te chnologies

* 468

Benefits

■

Excellent long-term bias stability

■

Internal polarizer

■

Low modulation voltages

Applications

■

Digital high-speed telecommunications: — SONET: OC-1 through OC-192 — SDH: STM-16, STM-64 — Undersea communications

■

Internet data communications

■

SONET/SDH test equipment

Telcordia Technologies

is a trademark of Telcordia Technologies,

Inc.

Page 2

Data Sheet

10 Gbits/s Lithium Niobate Electro-Optic Modulator May 2001

22 Agere Systems Inc.

Description

The 10 Gbits/s Electro-Optic Modulator is designed for long-wavelength, single-mode external amplitude modulation applications. It uses an integrated MachZehnder configuration to convert single polarization CW light from a semiconductor (DFB) laser into a timevarying optical output signal. Agere Systems Inc. also offers a 10 mW CW laser with polarization-maintaining fiber (D2525P) to use as a source for the modulator.

The Ti-diffusion process is a standard feature on all modulator devices. The 2623N, 2623Y, and 2623CS are single-drive, 10 Gbits/s modulators; the 2623CSA

is a single-drive, 10 Gbits/s modulator with an attenuating section. Variable attenuation to >19 dB is achieved through a dc bias voltage.

The package is hermetic to protect the LiNbO

die from the environment. Novel processing techniques now make it possible to achieve 20-year operation with little drift in the dc bias point. The modulator is tested to, and meets the intent of TR-NWT-00468.

Other standard features include PANDA-type polarization-maintaining fiber (PMF) for the optical input (all codes) and output (2623N, 2623Y, and 2623C) fiber with FC-type connectors that are keyed to the axis of polarization. Custom designs are available.

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute 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.

Parameter Symbol Min Max Unit

Storage Temperature T

stg

–40 85 °C

Optical Input Power @ 1.5 µm

—

30 mW

RF Voltage (peak to peak) V

—

10 V

dc Voltage (RF input) V

dcRF

–20 20 V

dc Voltage (Attenuator input) V

dcATT

–25 25 V

Operating Temperature T

070°C

Page 3

Data Sheet May 2001 10 Gbits/s Lithium Niobate Electro-Optic Modulator

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

3.5

3.7

4.5

5.5

6.5

dB Extinction Ratio @ dc 20 27 — dB Extinction Ratio @ RF — 13 — dB S11 Optical Return Loss — — –35 dB Bandwidth* 8 10 — GHz Drive Voltage (Vπ) @ dc 2.8 3.1 4.0 V Drive Voltage (Vπ) @ 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

Ω

0.2 µF

Ω

0.2 µF –10 pF

2623CSA

1-1063 (F)

1-1062 (F)

Page 4

Data Sheet

10 Gbits/s Lithium Niobate Electro-Optic Modulator May 2001

Agere Systems Inc.

Optical/Electrical Characteristics

(continued)

Electrical Signal Input

Electrical signal input is made through SMA coaxial connectors. The standard device includes an internal termination network. Care must be taken not to exceed the recommended 8 in./lb. of torque when making connections to these inputs. High-frequency coaxial cable is recommended.

Characteristic Curves

Figure 3. Magnitude of Electro-Optic Response,

0.130 GHz—20 GHz.

Figure 4. S11, 0.130 GHz—20 GHz

Figure 5. Output Power vs. Bias Voltage

Figure 6. Optical Power vs. Attenuator Bias Voltage

dBe

COR

AVG

START .130 000 000 GHz STOP 20.000 000 000 GHz

LOG MAG3 dB/ REF –55.48 dB 1: –55.846 dBE/OCH1

W/A

HID

FREQUENCY

SMA

POWER (3dB/div)

1. 130 000 000 GHz

4. –61.766 dB

18.76 48 GHz

2. –55.476 dB

0.9248 GHz

3. –58.476 dB

9.9690 GHz

dBe

COR

START .130 000 000 GHz STOP 20.000 000 000 GH

LOG MAG 5 dB/ REF 0 dB 1: –18.896 dBS11CH1

HID

FREQUENCY

POWER (3 dB/div)

1. 924 000 000 GHz

4. –8.7734 dB

14.7344 GHz

2. –15.278 dB

3.7006 GHz

3. –16.27 dB

5.0975 GHz

–10

–20

–30

–40

–50

–20 –10 0 10 20

MODULATOR dc BIAS VOLTAGE (V )

OPTICAL POWER OUT (dB)

1-1060(F)

1-898 (C)

–10

–20

–30

–40

–50

–40 –20 0 20 40

ATTENUATOR BIAS VOLTAG E (V)

OPTICAL POWER (dB)

–60

–30 –10 10 30

START = –23.98 V STOP = 25.58 V

1-1061(F)

1-1058(F)

1-1059(F)

Page 5

Data Sheet May 2001 10 Gbits/s Lithium Niobate Electro-Optic Modulator

Agere Systems Inc..

Outline Diagrams

Dimensions are in inches and (millimeters).

2623N, 2623Y, 2623CS Lithium Niobate Modulators

SMA SHORTING CAP

FIELD-REPLACEABLE SMA CONNECTOR

BEND LIMITER 2 PLACES

FC/PC CONNECTOR OPTIONAL 2 PLACES

Agere Electro-Optic Modulator

Model

S/N

A06686 98

2623N XXXX

0.20 (5.1)

1.20

(30.5)

0.14 (3.6)

1.5 METER MAXIMUM

LOOSE-TUBE

JACKETED FIBER

2 PLACES

2623N S/N XXXX A0668698 014097001

0.32 (8.1)

0.43

#4-40 UNC 2B

0.12 (3.05) DEEP MIN, 6 PLACES

4.64 (117.9)

0.60 (15.2)

0.39 (9.8)

0.20 (5.11)

1.53

(38.9)

4.00 (101.6)

2.00 (50.8)

0.09 (2.2)

(10.8)

INPUT

1-1064(F)a

Page 6

Data Sheet

10 Gbits/s Lithium Niobate Electro-Optic Modulator May 2001

Agere Systems Inc.

Outline Diagrams

(continued)

2623CSA Lithium Niobate Modulator

1-1064F.c

SMA SHORTING CAP

FIELD-REPLACEABLE SMA CONNECTOR

BEND LIMITER 2 PLACES

FC/PC CONNECTOR OPTIONAL 2 PLACES

Agere Electro-Optic Modulator

Model

S/N

A06686 98

2623CSA XXXX

0.20 (5.1)

1.20

(30.5)

0.14 (3.6)

1.5 METER MAXIMUM

LOOSE-TUBE

JACKETED FIBER

2 PLACES

2623CSA S/N XXXX A0668698 014097001

0.32 (8.1)

0.43

#4-40 UNC 2B

0.12 (3.05) DEEP MIN, 6 PLACES

4.64 (117.9)

0.60 (15.2)

0.39 (9.8)

0.20 (5.11)

1.53

(38.9)

4.00 (101.6)

2.00 (50.8)

0.09 (2.2)

(10.8)

INPUT

ATTENTION

ELECTROSTATIC

SENSITIVE

DEVICES

ATTENUATOR PIN # 2

ATTENUATOR PIN # 1

Page 7

Data Sheet May 2001 10 Gbits/s Lithium Niobate Electro-Optic Modulator

Agere Systems Inc..

Package Information

Designed to NEBS (inside plant) standards, the hermetic package design incorporates a laser-sealed lid and soldered fibers. The minimum bend radius for the fiber is 1.5 in. To prevent warping, use only the two center screws to mount the device.

Ordering Information

Table 2. Package Information

Description Type

Input Optical Fiber (all codes) PANDA-type PMF Output Optical Fiber:

2623N, 2623Y, 2623CS 2623CSA

PANDA-type PMF

Standard Single-mode Fiber Connector FC Fiber Length 1.5 m max RF Connector SMA Package Dimensions See Outline Drawings, page 5, 6.

Table 3. Device Information

Part Number Minimum

Bandwidth

(GHz)

Attenuator C-Band L-Band Comcode

2623N 8 No Yes Yes 1077393100 2623Y 9 No Yes Yes 108864604

2623CS 10 No Yes Yes 107862823

2623CSA 8 Yes Yes Yes 108433954

Page 8

Data Sheet

10 Gbits/s Lithium Niobate Electro-Optic Modulator May 2001

For additional information, contact your Agere Systems Account Ma nager or the following: INTERNET:

http://www.agere.com

E-MAIL:

[email protected]

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.

May 2001 DS00-331OPTO-2 (Replaces DS00-331OPTO-1)