devices incorporate a high-speed Fabry-Perot laser diode integrated in a pig-tail module. Packages are available with various connectors and

mounting styles.

Features

l High-speed Fabry-Perot laser diode

L8347 series: 1.25 Gbps

L7892 series: 2.5 Gbps

l Compatible with single-mode optical fiber

Applications

l Optical fiber communications

l Fiber channel

l Gigabit ethernet

l HDTV

l SDH

LASER

DIODE

Laser diode

Pigtail type, 1.3 µm, 1.25, 2.5 Gbps

L8347/L7892 series

s Absolute maximum ratings

(Ta=25 °C)

Parameter

Symbol

L8347 series

L7892 series

Unit

Ith + 14 (DC)

Ith + 16 (DC)

mA

Forward current

Ith + 28 (pulse) *

Ith + 32 (pulse) *

mA

Reverse voltage (laserdiode)

2

V

Reverse voltage (photodiode)

V

Operating temperature

Topr

-20 to +70

°C

Storage temperature

Tstg

-40 to +70

°C

* Duty ratio: 50 %

s

Parameter

Symbol

L8347 series

L7892 series

Unit

Peak wavelength

lp

1.31

1.31

µm

Forward voltage

1.1

1.1

V

Threshold current

Ith

69

mA

Fiber end output

0.1

0.3

mW

Rise time

tr

250

200

ps

Data rate

B

1.25

2.5

Gbps

Monitor current (photodiode)

Im

0.4

0.5

mA

s

Package lineup

L8347/L7892

Configuration

-11

-12

-21

-22

-31

-32

Mounting style

Coaxial

Board

Panel

Module

Dimensional outline

➀➁

➂

Type

SM (9.5/125) f0.9

Fiber

Length

1 m +20 cm/-0 cm

Type

SC

FC

SC

FC

SC

FC

Connector Dimensional outline

➃➄➃➄

➃

➄

1