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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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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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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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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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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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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How to design a pulsed laser driver circuit?
I want to try a simple theoretical design of a pulsed aaser rriver circuit according to what specified in this guideline from LASER COMPONENTS. Since the guide is not exhaustive, I'd like to get some ...
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How to properly calculate current limiting resistor for unknown part?
Newby question here ;) I have pulled apart a kids toy containing a small laser. The laser part doesn't have any partnumber on it, so I did some measurements on the actual device. Please note that I ...
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Impact of laser current source noise on RIN (relative intensity noise)
I am trying to specify the noise requirements for a constant-current source that would drive a diode laser with a certain relative intensity noise PSD. Lasers typically behave as forward-biased ...
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Arduino's impedance in breadboard circuit
(Warning, as this is a long question, asked by students that don't know what they're doing. Perhaps our questions are too general and can't be answered but at this point we'll take all the help we can ...
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Laser characterization setup
I was trying to design a setup to measure a laser beam's wavelength and (hopefully) its intensity (\$W/m^2\$). I mainly plan to work in the visible spectrum with intensities between 200 and 900 \$W/m^...
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IR laser detection
I'm currently trying to characterise a NIR 940nm laser device that I have recently made. The main thing I want to achieve is to see if the laser is truly doing what the enable signal told it to.
I ...
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Will the laser beam of a laser printer make the OPC drum more positively charged or more negatively charged [duplicate]
while I was tutoring students about A LEVEL computer science in chapter 3 -- hardware, I found a very interesting question about printer.
Some websites say that the laser beam could remove charges on ...
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