Search the CONFOCAL archive at
http://listserv.acsu.buffalo.edu/cgi-bin/wa?S1=confocal

Dear confocalists:


After replacing our laser on an MRC1000 and realigning our fiber
coupling on the input, we observe the following:

1) the beam leaving the fiber is much more divergent than before.

2) In the center of the beam there is a black shadow, shaped like the
number 8, but with three black circles (not only two, as in 8).

3) Output power is only 25 % of input, although better alignment may
still improve this.


Is this due to bad alignment? Or due to dirt? Or is something broken??

Any suggestion would be greatly appreciated!!!

With best wishes


Ernst



--
Ernst Niggli
Department of Physiology
University of Bern
Buehlplatz 5
CH-3012 Bern / Switzerland

E-mail: [log in to unmask]

WWW:
http://beam.to/Ernst_Niggli
http://beam.to/calcium_quark