I got my trilights 532nm DPSS Module +TTL Power about a month ago for my RGB laser projector build for ~$130.00 shipped (Link: http://stores.ebay.com/triAngle-lights). After reading that the analog version was not really analog, I just decided to go with the TTL module.
I started reading about the people talking about modifying the laser to use a Flexmod to drive the IR pump diode to make it analog (Link: http://www.photonlexicon.com/forums/...nm-200mw-Ebay/), so I decided to attempt it this weekend and here is what I got.
Insides:
Total of 6 wires that lead from the power unit to the dpss module:
Baby Blue - Don't know
Yellow - Don't know
Brown - Positive peltier module cooling module (only about 70% sure about this)
Yellow/Green - Negative peltier module cooling module (only about 70% sure about this)
Red - Positive IR pump diode
Black - Negative IR pump diode
The Baby Blue, Yellow, Red, and Black wires all seem to go through the heatsink and into the black cylinder. The Brown and Yellow/Green wires connect to wires that go into the peltier module.
Two potentiometers:
Top: Controls the IR pump diode current
Bottom (marked TEC Mode): Controls the peltier module current
DPSS Fan:
Model - XJ1253010M (DC12V, 0.08A)
Positive end connects to red wire and negative end connects to the brown wire from the power unit (thought that was very odd).
Flexmod test:
Results:
When you disconnect the red wire from the power supply unit it no longer turns on, thus causing the fans and peltier module not to be on. To overcome this a created a load resistance with 8 x 1.2ohm 1/2W resistors from the where the red wire use to be to where the black wire use to be on the power unit.
I then connected the Flexmod to the red and black wire on the DPSS module and used it to drive the IR pump diode. I could only get the power to max out at 290mW (without IR filter), anything higher caused the laser power output to start dropping so the TEC seems a bit unstable when using the Flexmod (Note: Fluke 117 multimeter is measuring the current of what I think is the peltier module cooling module because I was watching how it changed when running). Without the Flexmod, I could get it up to about 320mW (without IR filter) before the laser power output would start dropping. The fan on the back of the DPSS unit does not turn on when using the Flexmod, which also might be causing it to be unstable. It does seems to be analog now, but I have yet to test it completely until my projector is done.
Questions:
1. Can I run the DPSS module without the 12V fan on or is this going to cause problems? Any ideas on how to get it running?
2. How come there are 6 wires into the DPSS module? I know two are for the diode, two for the peltier module. Are the other two a temperature sensor or something?
3. Any ideas on getting the TEC stable?
4. What do you think is the max current I can put into this IR pump diode? (Stock was 676mA)