Multi-Channel-Transmitter-for- - Finisar Corporation

September 2001

Four Channel Transmitter – BH version

PRELIMINARY

Multi Channel Transmitter for D-WDM

_______________________________________________________________________________________________

Application:

· High Speed 2.5Gb/s per channel, Metro D-WDM

networks.

Features:

· 4 WDM channels standard, one fiber output,

isolator optional

· Fiber Grating Laser Diodes, wavelength locking,

APC and LD driving electronics included

· Thermal stabilization of LD

· Full ITU-T D-WDM grid available, channel

spacing 200 GHz standard (down to 50GHz)

· Wide operating temperature range

· Compact, hermetic package

Technical Specifications for 4 channel module

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings may cause permanent damage to the device. Exposure

to absolute maximum ratings for extended periods can affect the device reliability. The specified performance

can be achieved at the operating conditions, listed in this datasheet.

Parameter Symbol Conditions Rating Unit

LD optical output power/channel Pf CW 10 mW

Total supply current ITot 4 A

Total supply voltage VTot 5,25 V

Operating case temperature Tc 0 - +70 °C

Storage temperature Tstg -40 - +85 °C

ESD threshold tbd

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September 2001

Four Channel Transmitter – BH version

PRELIMINARY

Electrical/Optical Characteristics

Parameters are specified over operating case temperature.

A heat sink or ventilation may be needed to ensure operation within the above limits

Typical values are measured at 25°C, unless otherwise noted.

Electrical Characteristics

Parameter Conditions Symbol Min Typ. Max Unit

DC power supply voltage TEC included Vcc 4,75 5 5,25 V

DC power supply current TEC included Icc 2,4 4 A

Power dissipation Pdis 12 21 W

Input data voltage Vin 0,9 V

Input impedance Rin 50 W

Tx enable voltage Ven 0 0,8 V

Tx disable voltage Vdis 2,0 Vcc V

l deviation alarm/channel Note (1) V no-l alarm 0 0,3 V

V l alarm 4.5 Vcc V

Setting (active-low) l alarm -200 200 pm

Laser degrade alarm/channel V no alarm 4,5 Vcc V

alarm 0 0,3 V

Setting (active-

low)(2)

LD alarm 80 mA

Laser Bias Monitor Voltage per channel Vlbm 20 mV/mA

Laser Back-facet Monitor PD

Voltage (50% duty cycle)

Vbf 500 mV/m

Return Loss (input data) RLdata -10 dB

Note 1: Deviation due to control loop malfunction.

Note 2: Average Laser bias current

Optical Characteristics

Parameter Conditions Symbol Min Typ. Max Unit

Average Optical Power Output

per Channel

BOL Pave 2.0 5.0 dBm

EOL 3) Pave 0 2.0 dBm

Center wavelength range lc 1530 1610 nm

Variation of center wavelength

over temperature and lifetime

D lc -20 20 pm

Spectral width 2.5Gb/s

modulated, -20dB

D l20 0,2 nm

Side Mode Suppression Ratio SMSR 33 40 dB

Extinction ratio re 8,2 dB

Optical rise/fall time (20/80%) tr, tf 130 ps

Dispersion penalty (Type A) 1800ps/nm DP 2,0 dB

(Type B) 3000ps/nm DP 2,0 dB

Note 3: EOL defined as +20% change in Operating Bias Current

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September 2001

Four Channel Transmitter – BH version

PRELIMINARY

Fiber Pigtail Specification

Parameter Limits Unit

Fiber type SM

Mode field diameter 9.5±1 µm

Cladding diameter 125±2 µm

Secondary coating outer diameter 0.9±0.1 mm

Connector See ordering info

Optical return loss of connector 40 (min) dB

Typical Characteristics

Optical Power in Fiber

0.0

1.0

2.0

3.0

4.0

5.0

6.0

0 20406080100

Laser Current (mA)

Optical Power (mW)

Popt @ 18 °C

Popt @ 19 °C

Popt @ 20 °C

Popt @ 21 °C

Popt @ 22 °C

Typical LI curve at different laser temperatures

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07.11.01

September 2001

Four Channel Transmitter – BH version

PRELIMINARY

Spectrum at 50mA, 21°C

-70

-60

-50

-40

-30

-20

-10

1528 1530 1532 1534 1536 1538 1540

Wavelength (nm)

Relative Amplitude (dB

)

Wavelength

1533.0

1533.1

1533.2

1533.3

1533.4

1533.5

0 20406080100

Laser Current (mA)

Wavelength (nm)

Lambda @ 18 °C

Lambda @ 19 °C

Lambda @ 20 °C

Lambda @ 21 °C

Lambda @ 22 °C

Wavelength shift vs. drive current for different temperatures

Typical spectrum at average drive current

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September 2001

Four Channel Transmitter – BH version

PRELIMINARY

Package Dimensions

120 x 95 x 10mm³ (excluding cooling fins)

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