Model 762
OEM PULSEDLASER DIODE DRIVERANALOG MODULES, INC.

OEM Seed Laser Diode Driver AssemblyOUTPUT CURRENT UP TO 2.5 AMPSOUTPUT PULSEWIDTH 20ns TO CWCOMPLIANCE VOLTAGE TO 2.5V
ON-BOARD PULSE GENERATORDIGITAL OR ANALOG CONTROL+5VDC INPUT POWER
RoHS COMPLIANTDESCRIPTION:
AMI’s Model 762 OEM programmable seed laser diode drivers are ideal for driving 14-pin butterfly
packaged laser diode modules for use in CW or pulsed fiber MOPA systems. Applications include
materials processing, LIDAR systems for remote sensing, laser communication and rangefinding.

SPECIFICATION:
762PARAMETER

762-EXTMin.

Typical

Max.

Min.

Typical

Max.

Units

Power (Driver and TEC)

4.75

5.0

5.25

4.75

5.0

5.25

VDC

Current (Driver and TEC)

-

0.330

3.5-

0.330

3.5

A

Power (Laser)

3.0

5.0

12

3.0

5.0

12

VDC

Current (Laser) (Laser dependent)

--

2.5--

2.5

A

Control Voltage (50 Ω Impedance)

-

N/A-

0-

2.5

V

Current

0.1-

2.50.1-

2.5

ACompliance Voltage

-

2.0

2.5-

2.0

2.5V20Single
Shot0-

CW-

CWns-

10-

10MHz-

10020Single
Shot0-

100%Risetime (Optical) @ 2A-

1015-

1015nsFalltime (Optical) @ 2A-

10--10-ns* Analog Back Facet Monitor

0-

3.70-

3.7

V

TEC Voltage

0-

4.20-

4.2

V

TEC Current0-

3.00-

3.0

A

INPUT

OUTPUT

Pulsewidth
Repetition Rate
Duty Cycle

Faster risetimes, shorter pulsewidths, higher voltage, and CW operation possible under certain operating conditions (consult factory).

Specifications are subject to change without notice.

APPLICATIONS:
Seed Laser Diode Driver/Pump Laser Diode Driver for Pumping Fiber Lasers
126 BAYWOOD AVENUE ♦ LONGWOOD, FLORIDA 32750-3426 ♦ USA(407) 339-4355 ♦ FAX (407) 834-3806 ♦ E-mail: ami@analogmodules.com
www.analogmodules.com

2/2015

PROTECTION:

Adjustable current limit
Driver disabled when laser temperature exceeds temp window

CONNECTIONS:
Back Facet
Monitor:Power:
Interface:

Micro Coax Connector (Amphenol 908-24100)
3 pin Terminal Block (Molex 0393570003)
8 & 14 Pin AMP MicroMatch Connectors (7-215460-8 & 8-215460-4)

TEMPERATURE:
Operating:

0ºC to +50ºC

Storage:-20ºC to +70ºC

SIZE:

2.9" x 3.00" x 0.5”
2DIGITALCONTROL:

THERMAL:

Asynchronous (9600bps, 8nl serial) protocol or I C slave protocol (100 or 400kHz). All logic inputs
are TTL, 5V CMOS compatible. Digital outputs are pulled up to +5V internally with 4.75kΩ except
AMP SYNC1/AMP SYNC 2 pulled up to +5V with 300Ω.

On-board TEC Controller will provide heating and cooling as necessary to maintain desired operating
point. Thermistor and the TE cooler are in the laser diode package (not included). Customer may
need to provide thermal mass for heatsinking under high dissipation conditions.

OPERATING NOTES:
The driver circuitry operates from a single +5V power source. Additional voltages are generated on theboard by high efficiency switching power supplies. The laser power input may be operated down to +3V
to conserve power at the expense of switching speed. Input laser power may also be increased up to+12V to enhance switching speed for high inductance lasers. For most applications laser power may betied to the driver +5V supply, or through an external switch as an additional safety interlock.
An on-board field programmable gate array (FPGA) is programmed to handle communications, to modify
adjustable features, and to provide external flags and signals to a host system. The FPGA also contains
a comprehensive pulse generation system with many programmable features. Adjustments can also bemade through analog operation by the use of multi-turn potentiometers and providing an external TTL
trigger pulse so a serial interface is not required. A graphical user interface (GUI) program is included foreasy control and programming from a PC. The driver supplies a bidirectional proportional-integralderivative (PID) thermoelectric cooler (TEC) controller with current capability of 3A and voltage capabilityof 4.2V.
The 762-EXT is offered for those who require agile control of the laser current, want to modulate thecurrent or drive the laser with arbitrary waveforms, pulses with variable rise/fall times or modified pulse
flatness. An external control voltage with a calibration of 1A/V is required for this mode of operation andthe potentiometer and digital control of the laser current are disabled.
The board is manufactured as a RoHS compliant assembly built to the Directive 2002/95/EC
requirements. A heatsink adapter plate to mount to an external heatsink and all required mating cables
are supplied with each unit. Contact AMI today to discuss your custom requirements.

2

14-pin Connector (J7)8-pin Connector (J8)14-Pin Butterfly Package Interface(Customer-supplied)Pin

Signal_______ENABLE

PinPin2GND2345678CONTROL VOLTAGE
MONITOR GAIN MSBMONITOR GAIN LSBGND

34567811Signal_________CURRENT FAULT___________
TEMP. FAULTGND
LASER FIRE OUTGNDAMP SYNC1GNDAMP SYNC21234567810TRIG/PW
GND________
TRIG/PW
GND

11I2C CLK/ASSYNC TX

11121314I2C DATA/ASSYNC RX
GND
SERIAL SEL.

12131499103Connection
TEC Cooler (+)
Thermistor
Back facet monitor anode (+)
Back facet monitor cathode (-)
Thermistor
N/C
N/C
N/C
N/C
Laser diode anode (+)
Laser diode cathode (-)
N/C
Case ground
TEC cooler (-)

Sample Optical Output Waveforms
Data taken with 3S Photonics Model 1064CHP

20ns Pulsewidth, 2A Drive Current, 1KHz Frequency

200ns Pulsewidth, 2A Drive Current, 1KHz Frequency

Data taken with Oclaro Model LC96A1060-20R

20ns Pulsewidth, 2A Drive Current, 1KHz Frequency

200ns Pulsewidth, 2A Drive Current, 1KHz Frequency

Effects of increased laser voltage on output

3S Photonics, 20ns Pulsewidth, 2A Drive Current,
1KHz Frequency, 6V Laser Voltage

Oclaro, 200ns Pulsewidth, 2A Drive Current,
1KHz Frequency, 12V Laser Voltage

4Included Graphical User Interface Program

126 BAYWOOD AVENUE ♦ LONGWOOD, FLORIDA 32750-3426 ♦ USA(407) 339-4355 ♦ FAX (407) 834-3806 ♦ E-mail: ami@analogmodules.com
www.analogmodules.com
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