Hi there, I have a working 315M DPSS laser, with the controller, power supply, and a weird autostart dongle without the ready light... I am trying holography again (thanks Fred unterseher) in my livingroom w ith this new laser, but I think it may be having trouble stabilizing...? It starts up just fine, but when I run it though the interferometer it p erforms this ?breathing? routine, where the fringe pattern moves a little in a regular manner every 3-4 seconds, contracting in. I ha ve eliminated the possibility of table, pump, or fan movement- as my other cheapo chinesium diode laser settles just fine in no time. (I converted th e 315M-100 to water cooling, but the weird fringe behavior persists even wi th the pump off for 15 mins). I have tried the recommendations in the laser faq for this model, DC vol tage is good/stable, checked all ribbon cable conn?s (visually, as i'd hate to brick it by poking around with a multimeter). I have also trie d adjusting the pot down for a lower current/power setting to no avail- it resets and takes its 6mins to find a new stable setting, but the fringes ne ver settle. I do not have a oscilloscope or power meter handy as of yet, but it seem s to be stuck in a loop. Any suggestions would be appreciated!
-Roo