Questions tagged [laser]
Is the acronym Light Amplification by Stimulated Emission of Radiation. Can refer to Gas, electrical, or chemical lasers.
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Detector for a fiber optic gyroscope
I'm a navigation engineer, so I often have to deal with gyroscopes and their measurements. Out of curiosity, I've decided to build one myself and will give it a try with a Fiber Optics Gyroscope (FOG),...
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UL certification and laser tag equipment
We are a 32+-year-old laser tag equipment company. We purchase parts overseas and assemble them in the US and have hundreds of installations all over the world.
We have been told by 1 location that ...
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Powering on a laser diode that exceeds PSU max current
I have a laser diode that I want to test (just seeing if it turns on). However, the threshold current is past the 10A that my bench power supply can supply, hence I can't generate any light. How can I ...
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Control laser pointer on/off from external switch
I want to hook up leads to a laser pointer so that I can control it using an external switch. The goal is to turn the laser on/off using a MOSFET connected to an Arduino.
The battery contacts are ...
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The functionality of a driver circuit
I was requested to make a laser driver circuit for a course project. After some research, I found this circuit.
Can someone explain how this circuit works? What is 1R (R5&R6)? Can it be replaced ...
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Issue with Gain Compensation Circuit in MLD203P1 Laser Driver
I am experiencing difficulties with the gain circuit of Thorlabs' MLD203P1 laser driver. Despite adhering to the datasheet and evaluation manual, my laser diode is burning out, and the current ...
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Can two interfering light beams create radio waves?
Two sound frequencies differing in only a few hertz can create ‘beats’ and this has been popularized in music designed to produce ‘binaural beats’. Can two lasers be tuned in a similar fashion so that ...
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Laser Power Control Using Duty Cycle
I have a Coherent Cx-10 CO2 laser that I want to use for laser heating of very small samples at high pressure, so I need to accurately control the laser power. I also have a pulse width modulated ...
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What's the difference between a FP, gain guided and DFB laser diode?
What is the difference between a Fabry-Perot (FP), a gain-guided and a Distributed Feedback (DFB) laser diode?
I think Fabry-Perot is the default configuration, gain-guided has something to do with a ...
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Better switch/mux type for laser diode
I recently designed and tested a laser driver board which can generate max 200mA current. One of the requirement was to be able switch that current source between 4 laser diode channels. I used ...
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Creating a circular laser beam projection [closed]
I’m looking to create a small device (<5 in.) that will project a circular beam around it, a certain distance away from the object. The goal is to have a laser/projector module/something at the top ...
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Replicating this analog laser diode driver
I'm working on an RGB show laser and currently am figuring out what to do for the laser drivers, as they need to be modulated with a 0-5 V analog signal. There are ones for purchase but are pretty ...
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Arduino ultrasonic sensors in closed spaces
I am wondering whether or not it is possible to use an Arduino ultrasonic sensor in a closed box (30 cm x 30 cm.)
I have been told that the walls will cause the signal to bounce all over the place and ...
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Why are orange diode lasers still not common although orange LEDs have been around for decades?
Nowadays you can find lots of cheap laser diodes emitting light at wavelengths such as 405, 450, ~640, ≥780 and, since recently, also ~520 nm. But it's really hard to find a laser diode emitting at ...
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If we increased the frequency of HV-AC lines, could we get atmospheric air to excite and illuminate?
I had a thought experiment I wanted to run past some experts.
It starts with CFL light bulbs. CFL light bulbs are light bulbs that use ~500 VAC @ ~20 kHz or more to excite a gas in a light vacuum.
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