A371-Type Analog Uncooled Isolated

Data Sheet

DFB

FastLight Laser Module

January 1999

4

Lucent Technologies Inc.

Analog Operation

The A371-Type Laser Module has the capability of being used in a wide variety of analog operations. These may

include several channels of pure video signals, or a mix of video signals with digital data channels riding on analog

carriers. It is difficult to prepare a single battery of testing conditions that will satisfy all applications. The following

table contains a set of testing conditions that Lucent believes will give a broad indication of the performance of the

A371 Series Laser Module. Please contact your local Field Application Engineer if different testing conditions and

parametric limits are required.

The distortion characteristics are measured using a two-tone test. The frequencies are 13 MHz and 19 MHz. The

second-order distortion components are measured at f1 + f2 = 32 MHz and f1 – f2 = 6 MHz. All third-order distor-

tion components are measured in the frequency range of 5 MHz—200 MHz, and they meet the required level. All

measurements are made with SC-SPC connectors on the laser module pigtails.

* See Table 5 for more information.

† Double-isolated version.

‡ Low-performance option.

§ Single- and double-isolated versions.

Table 3. Analog Characteristics

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Output Power*

CW, T = –40

°C to +85 °C

—

2.0

—

mW

Relative Intensity Noise

RIN

Freq. = 5 MHz to 300 MHz;

no fiber loss, T = –40

°C to +85 °C

—

–155

–145

dB/Hz

Modulation Bandwidth

BW

T = –40

°C to +85 °C

1.0

—

—

GHz

Second-order Distortions

—

T = 25

Two-tone test: f1 = 13 MHz,

f2 = 19 MHz; 20 km of fiber,

(7 dB loss) plus connector loss,

f1

± f2

—

–54

–46

–50

dBc

dBc

dBc

Third-order Distortions

—

T = 25

Two-tone test: f1 = 13 MHz,

f2 = 19 MHz; 20 km of fiber

(7 dB loss), plus connector loss,

all peaks from 5 MHz—50 MHz

meet this level

—

–70

–69

–63

dBc

dBc

dBc

Spurious Noise

T = 25

ref. to one-tone: 5 MHz to 50 MHz,

20 km of fiber, (7 dB loss) plus

connector loss

—

–63

–61

dBc

dBc

Spurious Noise (carrier off)

T = 25

—

–50

–45

–45

dBc

dBc

dBc

RF Bandpass Flatness

Peak to valley, 5 MHz to 200 MHz

—

—

1.0

dB