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4hv.org :: Forums :: Sale and Trade
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CO2 Laser Resonator Mirrors on eBay
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RickR
Sat Jan 09 2010, 06:53PM Print
RickR Registered Member #93 Joined: Thu Feb 09 2006, 04:11PM
Location: Houston, Texas
Posts: 64
 		I'm not selling them myself, but I did order one set of CO2 Laser Cavity Mirrors off eBay. These mirrors seem suitable for a DIY CO2 laser. The cheapest mirrors I have been able to find before would run around $150.

Again, I'm not related in any way to the seller other than as a purchaser of their product.

RickR
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turbohead
Tue Feb 23 2010, 10:17PM
turbohead Registered Member #1037 Joined: Sun Sept 30 2007, 02:41AM
Location:
Posts: 3
 		The reflectance of the output coupler (92%) seems high. Most 30 to 50 watt lasers designs I have seen recommends about 85% reflectance.
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RickR
Wed Feb 24 2010, 06:07PM
RickR Registered Member #93 Joined: Thu Feb 09 2006, 04:11PM
Location: Houston, Texas
Posts: 64
 		Well, I chose the mirrors based on the design I found on this website: http://www.timefracture.org/laser.html.

This design used a 92% OC. Once I hit a slow spot with my high voltage experimentation, I plan to implement this particular design.

RickR
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turbohead
Wed Feb 24 2010, 08:50PM
turbohead Registered Member #1037 Joined: Sun Sept 30 2007, 02:41AM
Location:
Posts: 3
 		You may want to review Sam's FAQ in detail:

Link2

The FAQ provides tables of optimal reflectance for the tube length/tube inside diameter configuration.

For example, the design in the Timefracture website is a 1.2 meter tube. For a 15mm ID tube, the theoretical reflectance is 65%.

A 92% mirror will work, however, if you want more power, you will quickly outgrow the 92% reflectance mirror.

Another point of reference:

Link2

specifies an 80% reflectance output coupler.

Just trying to help.
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RickR
Wed Feb 24 2010, 09:32PM
RickR Registered Member #93 Joined: Thu Feb 09 2006, 04:11PM
Location: Houston, Texas
Posts: 64
 		No problem, I (and I'm sure others as well) appreciate the additional information.

BTW, do you have any favorite sources for mirrors/couplers with reasonable prices? I jumped at this set because it seemed relatively cheap.

Thanks,

RickR
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turbohead
Wed Feb 24 2010, 09:50PM
turbohead Registered Member #1037 Joined: Sun Sept 30 2007, 02:41AM
Location:
Posts: 3
 		I have purchased several CO2 laser optics from:

Link2

The owner is Bruce Sunderland. Bruce has been very helpful with advice and supports those who are making CO2 lasers as a hobby.

His prices are competitive. Bruce is also mentioned in Sam's FAQ.
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aonomus
Thu Feb 25 2010, 05:21AM
aonomus Registered Member #1497 Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
 		Not to derail, but if you don't trust ebay, Link2 is a commercial optics website that caters to high level stuff. Expensive though, but they'll certainly carry what you need, and probably give you advice too.
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