[Laser] How much power

[Terry Morris]

Has anyone research the specs for the power that the DVD/RW media require.
That should be published in a spec or standard somewhere.

Terry W5TDM


>From: "Chuck Hast" <wchast at gmail.com>
>Reply-To: Free Space LASER Communications <laser at mailman.qth.net>
>To: "Free Space LASER Communications" <laser at mailman.qth.net>
>Subject: Re: [Laser] How much power
>Date: Thu, 7 Jun 2007 00:27:36 -0400
>
>On 6/6/07, Jim Moss <n9jim-6 at pacbell.net> wrote:
>> >From what I recall,
>>The IR diodes in old R/W optical drives were 20-30mW output.
>>I seem to recall reading an article about the newer R/W CD drives at about 
>>35mW.
>>
>>Not sure about DVD R/W drives.
>>
>Jim,
>The faster they write the higher the power. I have seen data that indicate
>that some of the CD w diodes are now 70mw. The DVD diodes are higher
>yet, I have seen powers reported as high as 250mw for really fast writers.
>I have measured diodes at 100mw for some slower units.
>
>--
>Chuck Hast  -- KP4DJT --
>To paraphrase my flight instructor;
>"the only dumb question is the one you DID NOT ask resulting in my going
>out and having to identify your bits and pieces in the midst of torn
>and twisted metal."
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