

decision at 0xd72d    val= 0x01000
lamp 0  0xd897 0xdc91  len 129 usec
lamp 1  0xd7b8 0xdddd  len 200 usec
lamp 2  0x0 0x0  len 0 usec
lamp 3  0x0 0x0  len 0 usec
lamp 4  0xd601 0xd7a1  len 52 usec
Qswitch target missfire -46 usec
>
decision at 0x96e5    val= 0x01000
lamp 0  0x96d5 0xa179  len 346 usec
lamp 1  0x9774 0x9d99  len 200 usec
lamp 2  0x0 0x0  len 0 usec
lamp 3  0x0 0x0  len 0 usec
lamp 4  0x95b9 0x975a  len 53 usec
Qswitch target missfire 2 usec


The length of the pulse is also a function of how good a "view" the optical
fiber has of the end of the rod.  

decision at 0x35b9    val= 0x01000
lamp 0  0x0 0x0  len 0 usec
lamp 1  0x3648 0x3c60  len 198 usec
lamp 2  0x0 0x0  len 0 usec
lamp 3  0x0 0x0  len 0 usec
lamp 4  0x348d 0x362e  len 53 usec
Qswitch target missfire 1748 usec

decision at 0x3770    val= 0x01000
lamp 0  0x376f 0x410b  len 312 usec
lamp 1  0x3805 0x3e12  len 196 usec
lamp 2  0x0 0x0  len 0 usec
lamp 3  0x0 0x0  len 0 usec
lamp 4  0x3644 0x37e5  len 53 usec
Qswitch target missfire 0 usec

decision at 0xfe17    val= 0x01000
lamp 0  0x4f 0x25c  len 66 usec
lamp 1  0xfea9 0x4a9  len 195 usec
lamp 2  0x0 0x0  len 0 usec
lamp 3  0x0 0x0  len 0 usec
lamp 4  0xfceb 0xfe8c  len 53 usec
Qswitch target missfire -72 usec


This is real 3 lamp data

decision at 0x9395    val= 0x1710
lamp 0  0x924e 0x988c  len 203 usec
lamp 1  0x9141 0x986d  len 233 usec
lamp 2  0x90a4 0x982a  len 244 usec
lamp 3  0x0 0x0  len 0 usec
lamp 4  0x9095 0x9234  len 52 usec
Qswitch target 0x984e actual 0x984e 195 usec
>
>
>show
state 2 target 0x932f actual 0x932f rflags 0x17 fflags 0x1f 
decision 0x300  97 usec
risejitter 0x190  50 usec
offset 0x600  195 usec



The polarizer only works when the side which has the grub screw is facing
the HR.  Weird...

Successfull shot:
>
offset= 0x400
             
>
decision at 0x72e8    val= 0x1110
lamp 0  0x71e0 0x77d2  len 193 usec
lamp 1  0x0 0x0  len 0 usec
lamp 2  0x0 0x0  len 0 usec
lamp 3  0x0 0x0  len 0 usec
lamp 4  0x6fe8 0x7184  len 52 usec
Qswitch target 0x75e0 actual 0x75e0 130 usec
>

The avalanche transistor stack was done with 2n3904s, not 2n5551s 
(except for the triggered one on the bottom).

Do not flash the msp430 with the qswitch high voltage on, it will apply
DC to the qswitch for the duration of the flash.
Need to add rest button pads.
The peak osc output seems to be at offset = 0x530.

I put the passive qswitch back in.  So the theory is that the active one
will prevent the laser from lasing until well above the threshhold of
the passive qswitch, then it opens and the laser lases until it drops
below the passive qswitch threshhold.  So the active does the rising edge
and the passive takes care of the pulse length.

The laser will lase with the active qswitch disabled, though with 
much less output.

What is the angle of the 1/4 wave plate?  How does it interact with
the angle of the active qswitch?  

How does the polarization angle of the laser affect the SHG?

There is something arcing, sometimes.  (I hear an extra pop)  It seems
to be coming from the region of the amplifiers.  It may be related to
the qswitch.  (its power connector is dangling there.)

I rearranged the 24V power supply connector, its regulation sense
lines are now correctly connected.  It puts out exactly 24V, and
didn't affect the temperature regulation on the SHG and THG.  
Putting 24V into the qswitch trigger results in the 3.3V regulator
overheating (which was vaguely expected...).

Played with my oscilloscope some more, and have convinced myself that
the osc pulse really is on the order of 20 ns.  With the passive qswitch
(as well as the active) at least.  See oscpulse.hpgl.eps.

Re-observed the pulse with the passive qswitch removed.  There was no
significant change, see oscpulse_without_passive.hpgl.


