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Here is a picture of the beam and a system Phil

Elliptical around 2:1 but can be corrected. The only Melles Griot 457 nm with round beams are 100 mW BLS 301. They do have the collimator option so the beam isn't tiny. Phil

The newest Data sheet online from Ushio says "Single Transverse Mode", the Single Longitudinal Mode was simply a mistake. However they may be fine for Holography and I will test a couple soon on a 2GHz FSR scanning interferometer to see what the real linewidth is, Remember HeNe;'s ate arou...

Here are actual numbers: Laser #12 367 Hours 300 mW @ 13.2 Amps $7K Laser #13 367 Hours 300 mW @ 13.3 Amps $7K Laser #18 756 Hours 300 mW @ 14.7 Amps $7K Laser #15 1531 Hours 300 mW @ 14.2 Amps $7K Laser #17 195 Hours 300 mW @ 11.8 Amps $8K Laser #18 756 Hours 300 mW @ 12.1 Amps $8K Melles Griot BLS...

Correct. Shorter wavelength is better. Tgis is why high power long coherence HeCd were so desirable before diode lasers and DPSS were availavle.....say 180 mW @ 441.6 nm TEM 00 perfect beam. But they were huge, fan cooled, and $40K. I can get 300 mW Melles Griot BLS 601 lasers for $7K if we can get ...

PS So far I have sold five of them, all good and making Holograms.

Five 300 mW 457 nm SLM lasers are available in good condition with low hours. I need 3 to 5 buyers to make the deal happen; the owners are a large company and want to get these sold but at a fair price. $30K new, asking $7K. Beam is TEM 00 but elliptical around 2:1. Owners may have correction optics...

Just finished another build like this one but even better. Lasos MNova50 SLM. 50 mW @ 532 nm TEM 00 SLM. The original mount is on top of the heat sink making temperature even more stable with changes in the room air. A "thermal capacitor" effect. LC thermometer strip, new power supply and ...

Melles Griot BLS 601 Lasers Group Buy? Who is "in" for a low hour Melles Griot BLS 601 laser? $7K at most- I will try to get it lower say $6K. These are $30K new or more. 300 mW @ 457 nm SLM. Can be used at 150-200 mW for a long lifetime but not lower to maintain SLM. I have sold five-all ...

For $7K I can get you a Melles Griot BLS 601 laser used in good condition. 300 mW SLM @ 457 nm.

The company selling these wants me to sell several at once. Why wants to go in on one? Phil