TZ7-01-111A (3/6)

MITSUBISHI (OPTICAL DEVICES)

FU-645SDF-x1Mxx

1.55

µm UNCOOLED DFB-LD MODULE WITH SINGLEMODE FIBER PIGTAIL

(BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)

ELECTRICAL/OPTICAL CHARACTERISTICS (Tc=-5~70°C, unless otherwise noted)

Limits

Parameter

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

CW, Tc=25°C

-

10

25

Threshold current

Ith

CW

2

-

40

mA

Optical output power

at threshold current

Pth

CW, Ibias=Ith

-

-

50

µW

CW, Pf=2mW, Tc=25°C

-

40

70

Operating current

Iop

CW, Pf=2mW, Tc=70°C

-

60

90

mA

CW, Pf=2mW, Tc=25°C

-

1.2

1.5

Operating voltage

Vop

CW, Pf=2mW, Tc=70°C

-

1.6

1.8

V

Input impedance

Zin

-

-

25

-

Ω

Optical output power from

fiber end

Pf

CW, nominal

-

2

-

mW

Light-emission central

wavelength

λc

CW, Pf=1mW

1530

1550

1570

nm

Wavelength temperature

coefficient

λct

-

-

0.10

0.12

nm/°C

Spectral width

∆λ

(Note1), -20dB

-

-

0.4

nm

Side mode suppression ratio

Sr

(Note1)

30

45

-

dB

Cutoff frequency

(-1.5dB optical)

fc

Pf=1mW

3.5

-

-

GHz

Rise and fall time (10~90%)

tr, tf

(Note1)

-

125

150

psec

Dispersion penalty

Pp

(Note1), +1800ps/nm disp.

-

-

2

dB

Relative intensity noise

Nr

CW, Pf=1mW, f=1GHz

-

-150

-140

dB/Hz

Tracking error (Note 2)

Er

CW, APC(Imon=const.)

-

0.5

1.25

dB

CW, Tc=25°C

0.06

-

0.1

Differential efficiency

η

CW

0.036

-

0.15

mW/

mA

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

µA

Capacitance (PD)

Ct

Vrd=5V, f=1MHz

-

-

10

pF

Thermistor resistance

Rth

Tc=25°C

9.5

10

10.5

k

Ω

B constant of Rth

B

-

-

3950

-

K

Note 1) 2.48832Gb/s NRZ, 2

23

-1, Pf_ave=1mW, Extinction ratio 10dB, optical return loss from the line should be

greater than 24dB in order to ensure the specified performance.

Note 2) Er=max|10

×log(Pf / Pf@25°C)|

FIBER PIGTAIL SPECIFICATIONS

Parameter

Limits

Unit

Type

SM

-

Mode field diameter

10

±1

µm

Cladding diameter

125

±2

µm

Secondary coating outer diameter

0.9

±0.1

mm

Connector

See Table 1.

-

Optical return loss of connector

40 (min)

dB