new laser?

Started by Robert Baer in sci.electronics.design10 months ago 26 replies

My friend has made a working laser that has the following intellectual properties: 1) the more learned the individual is regarding laser...

My friend has made a working laser that has the following intellectual properties: 1) the more learned the individual is regarding laser construction and operation, the more confused and hostile they are regarding this new laser. 2) The less the individual knows about lasers, the more acceptable the laser is. This laser has absolutely *NO* optics, NO mirrors, no lenses; none, na...


another LT Spice question

Started by John Larkin in sci.electronics.design4 years ago 35 replies

I have this circuit driving a pulsed laser. I want to compute the energy dumped into the laser and the energy stored in the power...

I have this circuit driving a pulsed laser. I want to compute the energy dumped into the laser and the energy stored in the power supply capacitors. The ballpark is 120 amps into a 20 volt laser for a few hundred microseconds. What I did was create a "B" behavioral current source whose equation is I = V(LASER) * I(LASER) which represents power, and dump that into a 1 farad cap. The...


Edge-cutting Laser Pointer Plus Laser Presenter Boosts User Ability

Started by TomFred in sci.electronics.design10 years ago 3 replies

Price Updated Popular laser pointer now also serves wireless laser presenter with Power Point compatible function delivering high work...

Price Updated Popular laser pointer now also serves wireless laser presenter with Power Point compatible function delivering high work efficiency. This kind of Laser Pointer with Page Up down Function is the best choice for office and teaching presentation. The special Laser Presenter is suitable to teaching, meeting, speech and traning. Such kind of Remote Laser Pointer allows you to presen...


OT: Blinding Bugs with a Laser Pointer

Started by D from BC in sci.electronics.design2 weeks ago 58 replies

I saw a bug on my ceiling... Which reminded me of a utube video of a spider chasing after a laser spot. So I get the laser pointer(actually a...

I saw a bug on my ceiling... Which reminded me of a utube video of a spider chasing after a laser spot. So I get the laser pointer(actually a laser distance measurement tool) and aim it near the bug. It flies! I don't like flies and when it relanded on the ceiling I decided to do a less friendly test.. Laser blinding! muhahahhaha.... :P I rested the laser spot all over the fly. A good 30...


OT: Ha! Finally Found Something Not on Wikipedia

Started by D from BC in sci.electronics.design8 years ago 33 replies

Not of wiki.. "Laser Telemetry" http://en.wikipedia.org/w/index.php?title=Special% 3ASearch&search=LASER+TELEMETRY&go=Go A laser telemeter...

Not of wiki.. "Laser Telemetry" http://en.wikipedia.org/w/index.php?title=Special% 3ASearch&search=LASER+TELEMETRY&go=Go A laser telemeter is an instrument for measuring distance. Using a laser telemeter to measure distance is called laser telemetry. Reference: http://www.pearson.ch/download/media/9780130616104.pdf Tool example: http://ptd.leica-geosystems.com/en/Laser-Distancemet...


Anybody seen a spice model for a laser diode?

Started by Michael in sci.electronics.design10 years ago 17 replies

Hi there - I was thinking about trying to design a laser driver over the weekend. Unfortunately, I can't seem to find a spice model for a laser...

Hi there - I was thinking about trying to design a laser driver over the weekend. Unfortunately, I can't seem to find a spice model for a laser diode, putting a bit of a squabash on that plan. Anybody know where I can find one? Ideally I'd find one for a very normal ~5mw red laser diode - like those you'd find in a cheap laser pointer. Thanks! -Michael


Direct green laser diodes/modules?

Started by Richard Rasker in sci.electronics.design6 years ago 19 replies

Hello, I'm designing some equipment which incorporates a 5 mW green laser module. The problem is that all green lasers I've been able to find...

Hello, I'm designing some equipment which incorporates a 5 mW green laser module. The problem is that all green lasers I've been able to find so far are based on a 1064 nm IR laser pumping a frequency doubler, resulting in a 532 nm green beam. This type of pumped green laser has lots of drawbacks: it's relatively bulky, has a rather limited operating temperature range (roughly between 15 ...


Laser, graphene, propulsion

Started by amdx in sci.electronics.design2 years ago 43 replies

I heard about this on a Science 360 broadcast this morning. A laser pointed at a graphene sponge propels it forward. (not quite the same as...

I heard about this on a Science 360 broadcast this morning. A laser pointed at a graphene sponge propels it forward. (not quite the same as skysail) The researchers have several theories as to why. They do note the sponge emits electrons after being charged with the laser. My read says the electrons are only emitted from one side, the side the laser hits. Hmm? Also works with focused sunli...


Estimate of diode laser bandwidth

Started by George Herold in sci.electronics.design2 years ago 12 replies

Hi all, after tribulations with HV opamps and leaky inductors, my diode laser seems to be happy again. Here's a scan of the laser through a...

Hi all, after tribulations with HV opamps and leaky inductors, my diode laser seems to be happy again. Here's a scan of the laser through a Fabry-Perot confocal cavity. (F-P FSR ~ 380 MHz, finesse > 100.) https://www.dropbox.com/s/6zpgdfs6cqus7ig/TEK0015.BMP?dl=0 I put 10 MHz side bands on the laser to give a scale. Looking at the 'scope shot would I be safe in claiming 1 MHz (or bette


Semiconductor lasers

Started by Aleksandar Kuktin in sci.electronics.design2 years ago 13 replies

I tore up a computer mouse to get my grubby little paws on a laser. Only.. I'm not sure it's a laser. Apart from testing the output for...

I tore up a computer mouse to get my grubby little paws on a laser. Only.. I'm not sure it's a laser. Apart from testing the output for coherence, is there a way to tell a laser diode from a light-emitting diode? Other than that, how do you drive these things? Is there some Internet- accessible resource where this is explained? Usually, I begin my crawl with Wikipedia, but on the subj...


Laser locking (control loops with two feedback paths.)

Started by George Herold in sci.electronics.design5 years ago 44 replies

Laser locking (control loops with two feedback paths.) So I finally had a user ask about side locking our diode laser. (That=92s where you...

Laser locking (control loops with two feedback paths.) So I finally had a user ask about side locking our diode laser. (That=92s where you lock the frequency to the side of an absorption feature.) Now, you can change the laser frequency in two ways. There=92s a piezo stack that changes the angle of a diffraction grating. And you can change the laser current. The electronics is all set u...


Diode Laser

Started by Jon Slaughter in sci.electronics.design8 years ago 20 replies

What does a diode laser module add to a diode laser? A voltage regulator or current limiter?

What does a diode laser module add to a diode laser? A voltage regulator or current limiter?


TEC for laser diode

Started by mt in sci.electronics.design4 years ago 26 replies

I have a laser diode that is cooled by a fan and a heat sink. I have a small TEC lying around and I would like to integrate that to the laser...

I have a laser diode that is cooled by a fan and a heat sink. I have a small TEC lying around and I would like to integrate that to the laser diode head. How do I go about controlling the voltage supply to maintain a stable temperature. Thanks for you valuable input


Go cheap or functional when choosing laser presenter

Started by TomFred in sci.electronics.design10 years ago 1 reply

At some point or another in everybody's working life, a presentation in front of one's peers, colleagues, or customers is inevitable....

At some point or another in everybody's working life, a presentation in front of one's peers, colleagues, or customers is inevitable. Laser presenter offers a very nice alternative to remaining tethered to a PC while cranking through the PowerPoints. Since i am a person who like playing too much, i would like a laser pointer can be both useful in working and leisure time. That means some k...


laser used in metal 3D printer

Started by Jamie M in sci.electronics.design3 years ago 25 replies

Hi, Here is an upcoming metal 3D printer that uses a laser for melting metal powder layer by...

Hi, Here is an upcoming metal 3D printer that uses a laser for melting metal powder layer by layer: http://techcrunch.com/2014/07/18/matterfab/ Any idea on what type or even part# of laser this uses? There are a couple spots in the video with a close up of it, 5minutes in. cheers, Jamie


DVD Laser Head Control

Started by RonGr in sci.electronics.design8 years ago

Hi NG. Has anyone tried to work with DVD writer laser head modules...

Hi NG. Has anyone tried to work with DVD writer laser head modules like these: http://www.matelectronics.com/acatalog/Mat_Electronics_DVD_Laser_Parts_Accessories_26.html I do not mean just using the Laser diode from the system, but actually interfacing to the ribbon cable/cable connector supplied ? I am looking for technical specs/datasheet on focus-length, pin-out etc. The supplie...


Laser pointers.

Started by Jamie in sci.electronics.design5 years ago 9 replies

One of the guys did a flea market run this weekend. He knew I was looking around for a source for cheap laser pointer/toys, so I could strip...

One of the guys did a flea market run this weekend. He knew I was looking around for a source for cheap laser pointer/toys, so I could strip the lasers out of them.. He found me a deal. 15 Laser pointer-Animal toys, for $20 bucks. These are key chain things with end caps you can change project images instead if just a point. The 3 button cells in each package alone, is worth more...


Stepper motor, micro-stepping: Left vs Right

Started by Anonymous in sci.electronics.design5 years ago 10 replies

Using 12bit DAC, I would like to have 32 microsteps. I have mounted a laser on the shaft so I can see the laser beam on my wall, where I have...

Using 12bit DAC, I would like to have 32 microsteps. I have mounted a laser on the shaft so I can see the laser beam on my wall, where I have 32 grid lines. I've experimented, and it goes pretty well, all 32 steps are more or less on grid - when I go right. But when I turn back left, the laser dot moves fast, then slow, then fast again - not on grid. I haven't found anything on the ...


crazy memory ideas?

Started by Joseph H Allen in sci.electronics.design4 years ago 50 replies

Well here is one: Use a selenium-coated laser printer drum pretty much as intended. Impart a charge on it's surface, fire laser to erase...

Well here is one: Use a selenium-coated laser printer drum pretty much as intended. Impart a charge on it's surface, fire laser to erase charge for a 0 or leave it for a 1, then use some kind of electrometer to read the bit later. Recycle this back to the laser for recirculating memory. I'm wondering if there is any way to make a large scale CCD shift-register memory which can be made a...


Video monitors and CCD cameras.

Started by George Herold in sci.electronics.design5 years ago 29 replies

For one of our instruments, Diode laser spectroscopy, (http:// www.teachspin.com/instruments/diode_laser/index.shtml) We use a CCD camera and...

For one of our instruments, Diode laser spectroscopy, (http:// www.teachspin.com/instruments/diode_laser/index.shtml) We use a CCD camera and little TV to image the NIR laser spot and observe the Rubidium fluorescence. (Used to tune the laser to the correct wavelength.) So we didn=92t buy a lifetime supply of either the cameras or TVs and now they are both disappearing. (about a year...