Hi All
I'm just about to part with some more cash :-(
I have the following...
A Green 250Mw DPSS 532nm purchased from 'The Doctor'
A Red 450Mw(ish) Diode 650nm purchased from 'Marconi'
I want to order a Blue 200Mw from someone. I have contacted Lasever and they seem to be quite good units, their price is $1420 USD inc. shipping to the UK. In an Email I asked them if they could absolutely guarantee the published specifications and they can, all apart from two things. I quote their reply to my email to them below...
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1, Is the LSR473U Laser absolutely guaranteed to meet the specifications below (as shown on your website)? two items not, others yes:
Wavelength 473 nm
Output Power 200mW
Transverse Mode TEM00 (NOT)
Operation Mode CW
Beam Quality (M2) <1.2 (NOT)
Polarization Ratio 100:1
Beam Ellipticity <10%
Beam Diameter(1/e2) 2.0 mm
Beam Divergence 0.5 mrad
Pointing Stability <0.02 mrad per hour
Power Stability +/-5%
Warm Up Time <15 minutes
Operating Temperature 0~40oc
Lifetime 10,000 hrs
2, Does the Laser have an infrared filter?
yes.
3, Is the output of the laser guaranteed to be at least 200Mw of 473Nm blue light with NO infrared?
less than 0.1% percent of infrared power can be found because the filter can't absorb all infrared.
4, Is the beam a true Tem00 transverse mode with a true gaussian beam profile?
The beam is not guaranteed to be true gaussian beam profile, so not TEM00. But the beam of all looks Round and Small.
5,Is the beam ellipticity guaranteed at <10% as in the specification?
Yes, beam ellipticity guaranteed at <10%.
6, Is the output stable with no mode hopping after say, 15 minutes warm up time? no mode hopping
7, I would want analogue modulation up to 30khz 0 - 5v. Is the power supply that comes with the laser the LSR - PS - II?
The PS is LSR - PS - I. The modulation voltage is 0-5V. The brightness is about 80% when the analog modulation is 5khz and eventually comes down for 10khz and higher.
8, delivery time is one week, and the cost of postage $60 to the UK?
9, How do I pay for the laser - Credit Card, PayPal, Other way ??? wire transfer
In conclusion, Lasever makes good quality for the 200mW blue lasers. Others donot make TEM00 either. There are some lasers with TEM00 but not sure whether this one or that one.
Regards,
David Wu
Lasever Inc.
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I really value the depth of knowledge that you folks on this forum have, and am prepared to listen and learn from any advice you are prepared to offer me.
So, the question is... Should I go ahead and buy this Lasever laser, or does anyone have any other advice before I spend the money. I don't want to do something in haste that I may regret later. I read that Dave/Aijii on this forum also do decent lasers (CNI?). Opinions please ?
Cheers
Jem
P.S. As soon as I get the 'Blue' I have everything needed to start building![]()