DFB-1310-4X-50SMF-XXX

ELECTRICAL-OPTICAL CHARACTERISTICS

Parameter

Test Conditions

Symbol

Min.

Typ.

Max.

Units

Notes

Threshold Current

T = 25°C

10

20

40

mA

Operating Current

T = 25°C

45

70

mA

1

Modulation Current

T = 25°C

25

60

mA

ER~4.5dB

ER~6.5dB

Output Power

-4.0

dBm

10km option, 2

+2.5

30km option, 2

Slope Efficiency

T = 25°C, SMF

η

0.025

mW/mA

10km option

0.1

30km option

Extinction Ratio

6.0

9.0

dB

3

LA (wiggle)

LA

1.5

dB

4

Wavelength

T = 25°C

λ

1290

1330

nm

Spectral Width

Δλ

1.0

nm, rms

Wavelength temperature

coefficient

0.1

nm/°C

Side Mode Suppression

SMSR

30

dB

Relative Intensity Noise

0.1<F<5.5GHz

-120

dB/Hz

5

Modulation Bandwidth

4

6

GHz

Rise / Fall Time

Tr

Tf

90

90

ps

6

Forward Voltage

Vf

1

1.3

V

Laser Resistance

2

5

12

Ohms

7

Monitor Current

80

800

Tracking Error

TE

-1.25

1.25

dB

8

Monitor Dark Current

100

nA

Monitor Diode Capacitance

10

pF

Optical Return Loss

ORL

12

dB

Notes:

1. Operating current is the average bias current required to meet the ER, rise/fall, and bandwidth specifications. The target

operating condition is 35 mA over threshold at high temperature, 30mA over threshold at RT.

2. Other output power range is possible per customer request.

3. TOSA would be capable of meeting other specifications when modulated over this ER range.

4. Maximum change in power as fiber is rotated by 360º.

5. Measured with an optical receiver with a 3.125 Gb/s filter

6. Rise and fall times are measured 20-80%

7. Resistance is measured between ITH + 10mA and ITH + 20mA

8. Tracking error is defined as the coupled power difference at Tmax or Tmin (relative to 25°C) where the back monitor current,

Imon, is held constant at the value found at 25°C at I=Iop.