Connect with us

Continuous laser power?

Discussion in 'LEDs and Optoelectronics' started by lynkynpark86, Mar 8, 2012.

Scroll to continue with content
  1. lynkynpark86

    lynkynpark86

    8
    0
    Oct 22, 2011
    I'm working on a laser security system, and I have most of it figured out, except for this: Can I keep a laser plugged in for long periods of time without damage to the laser, it's surroundings, or the object it's pointed at? It'd be a low-power one, like on presentation remotes. Also, how much power would this use?
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,412
    2,780
    Jan 21, 2010
    The laser (assuming it isn't overdriven and gets hot) will operate for tens of thousands of hours. Consider CD, DVD and Blueray players which read the media using lasers.

    A laser rated at under a couple of mW will require perhaps 50 to 100mW of power to drive it. (I've never actually checked -- I'm embarrassed to say -- but they run for quite a while from teeny tiny batteries)
     
  3. john monks

    john monks

    693
    1
    Mar 9, 2012
    Laser

    Red lasers, 660nm, generally get weaker through time. So you probably want to use in infra-red laser 1100-1550nm and in the pulsed mode You might consider using about 1uS pulse width with a 1mS period. This will keep the beam invisible and will last for many thousands of hours or even decades. And the beam can be distinguished from ambient light.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-