Re: pulsed lasers-continuous lasers
- From: "extremesoundandlight@xxxxxxxxx" <extremesoundandlight@xxxxxxxxx>
- Date: Mon, 15 Sep 2008 13:01:34 -0700 (PDT)
On Sep 15, 12:43 pm, Camilo <camilo...@xxxxxxxxxxxxxx> wrote:
If what you meant was what determines whether the laser is pulsed or
continuous, it is how you design whatever pumps it.
--
hmm, so you mean that a laser that use and alternating source (an AC
HV source for instance) to generate light the output amplified light
has the same duration that AC period (1/frequency). And consequently
if I use a continuous pumping souce, the laser will emit continously
amplified light?! (a CC HV source, from a Van de graaff generator for
instance )
A charging voltage is applied to the system. A stage capacitors charge
through the charging resistors (Rc). When fully charged, either the
lowest gap is allowed to breakdown from over voltage or it is
triggered by an external source (if the gap spacing is set greater
than the charging voltage breakdown spacing). This effectively puts
the bottom two capacitors in series, over voltaging the next gap up,
which then puts the bottom three capacitors in series, which over
voltages the next gap, and so forth. This process is referred to as
"erecting". A common specification is the erected capacitance of the
bank, equal to the stage capacitance divided by the number of stages.
The charging resistors are chosen to provide a typical charging time
constant of several seconds. A typical charging current would be in
the 50-100 mA range. The charging resistors also provide a current
path to keep the arc in the spark gaps alive, and so, should be chosen
to provide a current of 5-10 amps through the gap. This has a pulsing
effect on the laser to obtain higher orders of radiation emission or
light emissions.
Or a cchv source.
.
- References:
- pulsed lasers-continuous lasers
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