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Those O-Like can be good heatsinkers too? Or if I want a more powerful laser I will necessarily need the press-fit mount?

Do you have some pics to illustrate which is press-fit mount and which is not? They all look pretty much the same to me.

Sigurthr, only by looking at a laser diode housing/host how can I know the maximum safety power of the laser diode to use with it and also know if I would need a press-tool or not to mount the diode inside it?

I'm not sure I follow you, but I think I do. You mean that even if I adjust the electrical gain of the PT to not reaching its maximum current, the problem will still exists because the larger the ambient light, lower will be the pulses in a relative way. I mean, as soon as the ambient light...

So the main problem is saturation, aint that right? If so, again I think it can be compensated. Take a look: This is basic idea behind my PT signals. I put them as simple current sources (just for simulation purposes). I also put 2 current sources (one is DC and the other is AC) so I could...

That's too bad. But why greater the frequency, more the ambient light affects me? If I will filter my frequency of interest (let's say 1MHz) with a nice band-pass filter, would not only beams flashing in that frequency disturb my system?

oh, I also bought a camera lens filter which is green to use as optical filter. But I started to think that maybe it reflects and absorb more than what it helps filtering. Also I was trying to use a camera lens inside the tube which was going to focus all the light in the PT (I used more than...

yeah, I did something similar with optical filtering (a tube with the PT inside). In a quick test with a simple RC filter (to eliminate DC part of the PT signal) and a 532 DPSS laser flashing in a frequency of 10Hz I was able to sense its reflection in a chair that was about one meter away. I...

Another thing, that's why I am thinking of buying more than one type of laser (20mW, 100mW and 300mW maybe). So I can make all kinds of tests over here.

I see. Yes, higher frequencies will be much harder to deal with from all points of view. But it may be the only way to do this. I bought a phototransistor with high sensitivity and its peak sensistivity is around 650nm. I dont think ambient light would be a problem since that's why I am...

I'm about to graduate in computer engineering. So I have to make a final work with all I've studied. This will probably be a robot with some intelligence. And part of this work will be sensing the environment. At first I think I will build a ultrasound system working together with a laser...

If I am going to build a 5mW laser, can I simply buy this diode: 2X 5 6mm 635nm 5mW Orange Red Laser Diode DL 3148 034 Sanyo Brand New | eBay and then buy one of these two: 1pc New 5 6mm T018 18x45mm Industrial Laser Diode House Housing Case Lens | eBay or 30mm Chrome Laser Diode Housing...

I see.... but I think all diode lasers that come with this module also come with drivers, aint they? And some of them are pretty difficult to remove its driver without damaging it. Is it possible to find lasers inside those modules without drivers? Or should I buy parts individually and then...

Are we talking about the same thing? I see that there are two basic types of laser diodes which do not come with driver (I will build my own driver). These are: 2X DL 4247 162 Sanyo Laser Diode 650nm 10mW for CD Recording | eBay and New Mitsubishi 645 655nm 350 500mW High Power Red Laser...

But this laser that i've posted is a 350mW and it does not have that round silver protective case around the diode. I think I've misunderstood what you've said.

I see... and is there any special need to have this external round case? This diode laser does not seem to have it: New Mitsubishi 645 655nm 350 500mW High Power Red Laser Diodes LPC 836 1 Pcs PCK | eBay Its only a protection case (as some pictures in google say) or it might help with...

i forgot to ask one last thing: If I buy a 100mw diode laser (650nm) like this one: 650nm 660nm 100mW CW Red Laser Diode LD Mitsubishi ML101J25 | eBay i would get the same result of buying this: 5 6mm 650nm 5mW Red Laser Diode Best Price 4 Pin | eBay using the same current source? I mean...

Thanks all you guys!

Thanks! Yea.. as I suspected. But once I searched google for this difference and I've found this web site: DPSS Laser Kits (Pantotek Technology, China (Mainland)) where he says: "DPSS Laser Kits Model No: DPSS LASER Kits Provide dpss laser kits in low cost, including: 1.808nm laser...

Thanks Sigurthr. As for the last question: yes, i mean identify the laser phisically by looking at the package type, not by looking at the laser beam. Is it possible?