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Output Current <5A To 40A Repetition Frequency To 1 MHz Variable Pulse Width From 12ns to 1s Economical OEM Module
The DLD-100B is a high speed, high current pulsed laser diode driver designed to operate at 5A to 40A output current with continuously variable pulse widths from 12ns to 1s (Option A), and frequencies up to 1MHz. The DLD-100B is available in two models. Option A is optimized for fast rise and fall times and a narrower minimum pulse width than Option B. Option B is optimized for maximum duty cycle and efficiency, with a slower rise time and longer minimum pulse width than Option A. (See specific performance data on the following pages.) The output pulse is launched on low inductance pads. The laser diode can be mounted directly on the driver, or connected via a low inductance stripline interconnect. The driver is supplied mounted on a 1/4" aluminum heat spreader to provide the cooling needed for the switching transistor, and to simplify mounting or installation of the driver.
DLD-100B
PULSED LASER DIODE DRIVER
DLD-100B Option A 20A Output, 12ns Pulse Width
DLD-100B Option A 30A Output, 600ns Pulse Width
The Pulse Of The Future Directed Energy, Inc. * 2401 Research Blvd., Suite 108 * Fort Collins, CO 80526 TEL: 970-493-1901 * FAX: 970-493-1903 * EMAIL: deiinfo@directedenergy.com * INTERNET: www.directedenergy.com
Technical Description
The DLD-100B is an open-frame, OEM module designed for integration into the user`s equipment. The driver requires +12 to +15VDC support power, a high voltage DC input (150VDC maximum for Option A, 60VDC maximum for Option B), and a +5V gate signal. The amplitude of the high voltage DC supply controls the amplitude of the output current pulse. The output pulse width and frequency follow the input gate's width and frequency. To minimize cost, the driver is designed so that the laser diode is floating on the voltage of the drain of the output transistor. The diode must be electrically isolated from earth (chassis) ground. The cathode (-) connects to W1, and the anode (+) connects to W2.
+ High Voltage Input (P1 - 2) Energy Sorage Capacitors Impedance Matching Resistor Laser Diode (Floating) Cathode (-) = W1 Anode (+) = W2
+12V (P1 - 4)
Control Gate (P1 - 6)
Gate Drive Circuitry
DE150-201N09 Power MOSFET
DLD-100B Simplified Block Diagram
SPECIFICATIONS
PARAMETER Peak Output Current Minimum Pulse Width (Typical) Maximum Pulse Width at 5% Droop Pulse Rise Time (10% to 90%) (Typical) PRF (Pulse Recurrence Frequency), CW Gate (Trigger) In Support Power DC HV Input Throughput (Propagation) Delay MECHANICAL Size
ALL SPECIFICATIONS MEASURED INTO A SHORTED OUTPUT. SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.
DLD-100B Option A 30A, controlled by input high voltage amplitude 12ns (12E-9S) 1s (1E-6S) 11ns (11E-9S)
DLD-100B Option B 40A, controlled by input high voltage amplitude 15ns (15E-9S) 600ns (6E-7S) 18ns (18E-9S)
Single Shot to 1MHz, limited by maximum average current, controlled by input trigger frequency (see tables below) +5V/50 Output pulse width and frequency follow gate's width and frequency +12VDC to +15VDC at 60mA typical 150V Maximum 60V Maximum <40ns, typically 35ns 70mm (2.75") W x 100mm (3.9") L
Output Current (A) 5 10 15 20 25 30 35 40
Maximum Duty Cycle Option A 0.09 0.025 0.01 0.006 0.0035 0.002 ----- ----- Option B 0.40 0.1 0.04 0.024 0.015 0.01 0.008 0.005
Typical Input Voltage (VDC) Option A 25 50 75 100 125 150 ----- ----- Option B 6 12 20 25 32 40 47 60
Maximum Frequency Versus Pulse Width
The graphs below show the maximum pulse repetition frequency (PRF) versus pulse width at various output current levels. These graphs can be used to determine the maximum safe operating area for a given output current.
PULSE WIDTH vs PULSE RATE - DLD-100B Opt. A
1000 Pulse Rate (KHz)
100
10
1 25 200 400 600 800 1000 Pulse Width (Nanoseconds)
5A
10A
15A
20A
25A
30A
PULSE WIDTH vs PULSE RATE - DLD-100B Opt. B 1000
Pulse Rate (KHz)
100
10
1 25 50 100 200 300 400 500 600 Pulse Width (Nanoseconds)
5A 25A
10A 30A
15A 35A
20A 40A
Typical Performance Waveforms
The oscilloscope photos below show typical output waveforms of the DLD-100B. All waveforms are driving a shorted output.
DLD-100B Option A 10A Output, 600ns Pulse Width
DLD-100B Option A 30A Output, 18ns Pulse Width
DLD-100B Option B 10A Output, 15ns Pulse Width
DLD-100B Option B 5A Output, 40% Duty Cycle At 826KHz
DLD-100B Option B 40A Output, 15ns Pulse Width
DLD-100B Option B 40A Output, 500ns Pulse Width
DLD-100B 0299
The Pulse Of The Future Directed Energy, Inc. * 2401 Research Blvd., Suite 108 * Fort Collins, CO 80526 TEL: 970-493-1901 * FAX: 970-493-1903 * EMAIL: deiinfo@directedenergy.com * INTERNET: www.directedenergy.com

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