850 NM 2.5 G VCSEL TOSA

parameter

Symbol

Test Condition

Minimum

Typical

Maximum

Unit

VCSEL

Case operating temperature

-40

85

°C

Peak emission wavelength

840

850

860

nm

RMS spectral width

Dl

0.65

nm

T = -40 °C to 85 °C

0.06

nm/°C

Threshold current

1.5

2.5

mA

T = -40 °C to 85 °C

1.5

mA

h

T = 25 °C

0.08

0.11

0.13

mW/mA

h

T = -40 °C

0.15

mW/mA

h

T = 85 °C

0.06

mW/mA

Slope efficiency temperature variation

Dh/DT

-6000

PPM/°C

Laser forward voltage

1.7

2.0

V

Series resistance

20

45

60

Ohms

T=-40 °C

70

Ohms

T=85 °C

20

Ohms

Series resistance temperature coefficient

-2000

ppm/°C

T= 0 °C to 70 °C

20% - 80%

100

130

psec

20% - 80%

120

150

psec

Coupling efficiency

efiber

75

%

Average fiber coupled power

0.50

mW

Relative intensity noise

-130

-122

dB/Hz

MonitorPhotodiode

Photocurrent

0.15

0.6

mA

0.05

0.1

%/°C

T = 0 to 70 °C

Monitor dark current

20

nA

Monitor capacitance

100

pF

1. Slope efficiency is defined as

2. Drive electronics and optical measurement hardware affect Rise/Fall Time measurement.

3. Change in optical power over temperature while operated in a feedback loop in which the monitor current is held constant.

Electro-optical Characteristics