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Laser Circuits Page
3 Lasers: #-KLM-Z
Last Updated on:
Sunday, July 27, 2008 07:40 PM
Circuits Designed by Dave Johnson, P.E. :
MICRO POWER 40KHz BURST LASER DIODE DRIVER
Some laser tag or simulated combat games can use this circuit to send short bursts of modulated laser light at the opponent's vest, equipped with a matching light receiver. The circuit operates
from three 1.5v cells (4.5v) that should provide enough energy for about 200,000 shots.
MODULATED LASER DIODE TESTER
This circuit can either be used to test laser diodes or as a general purpose modulated light source. The circuit has an adjustable diode threshold current and an adjustable modulation frequency.
The frequency can be adjusted from below 30KHz to above 50MHz. It is powered from a 9v battery.
Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
Thermoelectric Cooler Temperature Controller for Fiber Optic Lasers: AN89 Linear Technology This application note presents
circuitry for maintaining 0.01°C temperature control of fiber optic lasers over wide ambient range variations. The circuitry also features high efficiency power delivery, compact size and low
noise. Detailed descriptions of circuitry and results are given with special emphasis on thermal loop optimization. An appended section covers practical considerations for thermoelectric
cooler-based control loops.
Using the ADN8810 Demo Board: AN-619 Analog Devices Application Notes (app note added 2/06) The ADN8810 is a
12-bit,high output current D/A converter that is controlled through a serial peripheral interface (SPI) . The device can be used as a current source for tunable lasers or other precision
high output current applications, like 4 –20 mA control loops.
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