Looking for 457nm laser with coherence length > 50cm

[Frank]

Hi,guys
Is there anyone that I can get this type of laser as in the title?

I am looking for it.

Thanks for your help firstly.

[Jem]

Hi Frank

Are you wanting this for Holography?

If so, you may get a better response posting this on the Holography forum...

http://www.holographyforum.org

I don't know of any DPSS or Diode lasers at 457nm, perhaps a gas laser with an etalon may be a possibility.

Cheers

Jem

[allthatwhichis]

I don't know of any DPSS or Diode lasers at 457nm, perhaps a gas laser with an etalon may be a possibility.

Cheers

Jem

Actually there are 457nm dpss lasers. dave and aijii have several on thier site, but I am unsure of the specs. I think there is also a didoe capable of that wavelength but may be wrong...

[Jem]

Oop's, you're correct. I stand corrected.

Still I wouldn't like to guess at the stability/coherence length of them. A coherence length of >50cm is a tall order without a LOT of effort to stabilise the laser cavity. The Coherent C315m is a prime example of a long coherence length laser, that has lots of goodies controlling the temperature in order to get the required stability.

Cheers

Jem

[dave]

Nichia make diodes that lase at 455nm also

[buffo]

Dave;

Are those 455, or 445 nm? I knew of the 445 nm units, but 455 is new. I'm assuming these are direct-injection blue diodes, right?

I'll bet they're priced in the stratosphere though...

Adam

[dave]

opps, ur right buffo

[Frank]

Thanks for all the informations.
I will connact both dave and aijii to see whether they can help me.

If any one gets news,please let me know.Send me a PM,thanks.