Mitsubishi Electric Corporation Semiconductor Group FU-445SDF-WM1 Datasheet

1.3 mm UNCOOLED DFB-LD MODULE WITH SINGLEMODE FIBER PIGTAIL
(BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)

DESCRIPTION

Module type FU-445SDF-WM1 is a 1.3mm Uncooled
DFB-LD module with single-mode optical fiber.
This module is suitable t o a light source for use in

2.5Gb/s digital optical communication systems.

FEATURES

l/4 shifted Multi quantum wells (MQW) DFB
Laser Diode module
Input impedance is 25W

Emission wavelength is in 1.3mm band
High-speed response

Built-in optical isolator
Built-in thermistor and bias T
8-pin Mini-DIL package with Gull wing leads
With photodiode for optical output monitor

APPLICATION

High speed transmission systems (~2.5Gb/s)

MITSUBISHI (OPTICAL DEVICES)

FU-445SDF-WM1

ABSOLUTE MAXIMUM RATINGS (Tc=25°C)

Parameter Symbol Conditions Rating Unit

Laser diode

Operating case temperature Tc -10 ~ +85
Storage temperature Tstg -40 ~ +85

Optical output
power

Forward current If CW 100 mA
Reverse voltage Vrl
Reverse voltage Vrd 20 VPhotodiode
Forward current Ifd

Pf CW 6 mW

2V

2mA

°C
°C

MITSUBISHI (OPTICAL DEVICES)

FU-445SDF-WM1

1.3 mm UNCOOLED DFB-LD MODULE WITH SINGLEMODE FIBER PIGTAIL
(BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)

ELECTRICAL/OPTICAL CHARACTERISTICS (Tc=-10~85°C unless otherwise noted)

Parameter Symbol Test Conditions Limits Unit

Min. Typ. Max.

Threshold current Ith

Optical output power
at threshold current

Operating current Iop

Operating voltage Vop CW, Pf=2mW - 1.2 1.5 V
Input impedance Zin - - 25 -

Optical output power from
fiber end

Light-emission central
wavelength

Wavelength temperature
coefficient

Spectral width
Side mode suppression ratio Sr (Note 1) 30 45 - dB

Cutoff frequency
(-1.5dB optical)

Rise and fall time
(10~90%)

Dispersion penalty Pp (Note 1), -300ps/nm disp. - - 0.5 dB
Relative intensity noise Nr CW, Pf=1mW, f=1GHz - -150 -140 dB/Hz
Tracking error

(Note 2)
Differential efficiency

Monitor current Imon CW, Pf=1mW, Vrd=5V 0.05 - 1 mA
Optical isolation Iso - 20 - - dB
Dark current (PD) Id Vrd=5V - - 0.1

Capacitance (PD) Ct Vrd=5V, f=1MHz - - 10 pF
Thermistor resistance Rth

B constant of Rth B - - 3950 - K

Note 1) 2.48832Gb/s NRZ, 223-1, Pf_ave=1mW, Ibias=Ith, optical return loss of the connectors should be greater

than 40dB in order to ensure the specified performance.

Note 2) Er=max|10´log(Pf / Pf@25°C)|

Pth CW, Ibias=Ith - - 50

Pf CW,nominal - 2 - mW

lc

lct

Dl

fc Pf=1mW 3.5 - - GHz

tr, tf (Note 1) - 125 150 psec

Er CW,APC(Imon=Const.) - 0.5 1.25 dB

h

CW,Tc=25°C
CW 2 - 40

CW, Pf=2mW,Tc=25°C
CW, Pf=2mW,Tc=85°C

CW, Pf=1mW 1290 1310 1330 nm

- - 0.09 0.1

(Note 1), -20dB - - 0.8 nm

CW, Tc=25°C
CW 0.04 - 0.27

Tc=25°C

-1025

-4070

-6090

0.06 - 0.2

9.5 10 10.5

mA

mW
mA

W

nm/°C

mW/

mA

mA

kW

FIBER PIGTAIL SPECIFICATIONS

Parameter Limits Unit
Type SM ­Mode field diameter 9.5 1

Cladding diameter 125 2
Secondary coating outer diameter 0.9 0.1 mm

Connector SC/PC ­Optical return loss of connector 40 (min) dB

mm
mm