Hello,

I have been looking for a while for a laser diode (DPSS system) in
the
blue (405, 473, 488 or anything in between) for a low cost (per W)
and
low maintenance (operation hours, service) for holography (simple
diffraction phase gratings). A coherence length of like 20cm would
be great, 10 cm is doable 1cm is borderline.


Until now, I have tested two laser systems and have failed to
performed as promised by the sellers and had to be returned.


I was wondering if anybody knows of anybody that have an acceptable
DPSS laser in the blue. I am starting to reconsider Ar+ ions and
HeCds but I still would prefer a diode. I dont want to deal with
water cooling or short lifetime.


I usually test the lasers using a scanning Fabry Perot (Coherent
spectrum analyzer), measure fringe visibility vs optical path length
difference in a Michelson interferometer and before giving up, I try
to record a reflection and/or transmission type grating. When the
grating doesnt show up, the laser goes back to the seller and I have
an upset boss.


Any help will be greatly appreciated,

100m:
http://www.dragonseye.com/holography/net54holoarchive/1055780828.htm

On Mon, 7 Jan 2008 13:15:12 -0800 (PST), Goldeneye
juan.manuel.russo@gmail.com> wrote:

Hello,

I have been looking for a while for a laser diode (DPSS system) in
the
blue (405, 473, 488 or anything in between) for a low cost (per W)
and
low maintenance (operation hours, service) for holography (simple
diffraction phase gratings). A coherence length of like 20cm would
be great, 10 cm is doable 1cm is borderline.


Until now, I have tested two laser systems and have failed to
performed as promised by the sellers and had to be returned.

I was wondering if anybody knows of anybody that have an acceptable
DPSS laser in the blue. I am starting to reconsider Ar+ ions and
HeCds but I still would prefer a diode. I dont want to deal with
water cooling or short lifetime.

I usually test the lasers using a scanning Fabry Perot (Coherent
spectrum analyzer), measure fringe visibility vs optical path length
difference in a Michelson interferometer and before giving up, I try
to record a reflection and/or transmission type grating. When the
grating doesnt show up, the laser goes back to the seller and I have
an upset boss.

Any help will be greatly appreciated,

http://www.holoshop.com/catalog/display_item.asp?id=2943

1 inch coherence length:
http://www.holographyforum.org/phpBB2/viewtopic.php?f=2&t=5343

100m:
http://www.dragonseye.com/holography/net54holoarchive/1055780828.htm

commercial reliable holography equipment:
http://www.photonicsonline.com/Content/news/article.asp?Bucket=Article&DocID=852648dc-9ea0-11d5-a775-00d0b7694f32&VNETCOOKIE=NO

I just used google and searched with: dpss blue holography coherence
length

best regards

John

Hello,

I have been looking for a while for a laser diode (DPSS system) in
the blue ...
I was wondering if anybody knows of anybody that have an acceptable
DPSS laser in the blue.  I am starting to reconsider Ar+ ions and
HeCds but I still would prefer a diode.  I dont want to deal with
water cooling or short lifetime.