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Laser Output

Discussion in 'Electronic Design' started by Myauk, May 14, 2007.

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  1. Myauk

    Myauk Guest

    While preparing Specifications for DVD Recorder sets, I noticed that
    they are in a range from 0.8 mW to 1.2 mW for Laser output power
    during reading, and from 20 mW to 78 mW for Output Power During
    writing.
    And also the Laser Wavelength is different form one another 650, 658,
    780, 785 etc.
    I thought they should follow the standard value which might be the
    same for all the DVD Recording units selling in the market.
    Any comments?
     
  2. D from BC

    D from BC Guest

    All I know is that I think I saw a youtube video of someone igniting a
    match with a DVD laser...
    D from BC
     
  3. Jim Yanik

    Jim Yanik Guest

    Why would DVD's take so much power to write? Do CD's need that much power?

    also,shorter wavelength means more data can be written.
     
  4. Myauk

    Myauk Guest

    :)
     
  5. Myauk

    Myauk Guest

    And also the Laser Wavelength is different form one another 650, 658,
    (nano meter range)
     
  6. I'd expect the power to be proportional to the datarate
    and we're not slow anymore, the movies would never get written.

    Rene
     
  7. Myauk

    Myauk Guest

    Does anybody know the standard figures for them?
    I mean, is there any standard for this?
    Regards
     
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