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Thread: Who make DPSS lasers with "negative" conrol voltage?

  1. 08-14-2008, 03:03 #1
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    riyalasers
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    Default Who make DPSS lasers with "negative" conrol voltage?

    Who have big experiense with using DPSS laser modules...
    By my data, MOST producers use POSITIVE voltage for control of laser modules: zero voltage - "closed" beam; PLUS 5 Volt - "open" beam.

    But one my client is sure that very many manufacturers use "negative" control (o to MINUS 5Volt)

    Write here please statistic for type of laser control...
    Ihor
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  2. 08-14-2008, 03:18 #2
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    Quote Originally Posted by riyalasers View Post
    Who have big experiense with using DPSS laser modules...
    By my data, MOST producers use POSITIVE voltage for control of laser modules: zero voltage - "closed" beam; PLUS 5 Volt - "open" beam.

    But one my client is sure that very many manufacturers use "negative" control (o to MINUS 5Volt)

    Write here please statistic for type of laser control...
    Ihor
    My blue DPSS uses negative modulation. It's from Dragon Lasers.
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  3. 08-14-2008, 03:26 #3
    FourDee
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    Lion lasers use inverted modulation (0V = full on)
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  4. 08-14-2008, 03:29 #4
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    Just checked my Neo-Neon DPSS and diode stack modules and those use negative modulation too.
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  5. 08-14-2008, 14:11 #5
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    I have one Lion DPSS blue TTL. When I leaved ttl cable unconnected the laser is on, so 0V, on. However, when I connect it to a DAC, it is off between 0 and ~2V then it turns on.

    Any idea of the reason?
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  6. 08-14-2008, 17:47 #6
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    CMOS inputs left unconnected read "high", not "low".
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  7. 08-14-2008, 22:13 #7
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    Viasho has Positive Voltage for the lasers.
    http://www.viasho.com
    wzc@viasho.com
    Wechat & Whatsapp: +8613911142669
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  8. 08-14-2008, 22:37 #8
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    laserwave had both "positive" and "nagative" TTL, you can choose with you like..
    Best regards!
    Bridge
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  9. 08-14-2008, 23:03 #9
    Simon2006
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    Tried some Viasho lasers, showed very positive voltage to me
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  10. 08-15-2008, 05:17 #10
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    Quote Originally Posted by heroic View Post
    CMOS inputs left unconnected read "high", not "low".

    Clear!!! Thank you very much!
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